JP7414245B2 - Computer-implemented method, computer system for exercising rights associated with blockchain non-fungible tokens - Google Patents

Description

The present disclosure relates to a computer implementation method, a computer system, a method for manufacturing a non-fungible token, and a non-fungible token. This application claims priority based on Japanese Application No. 2021-175267 filed on October 27, 2021, and incorporates all the contents described in the said Japanese application.

A non-fungible token (NFT) is a type of token recorded on a blockchain. NFTs are issued, for example, according to the Ethereum Request for Comments (ERC) 721 standard. Patent Document 1 discloses Ethereum.

Japanese Patent Application Publication No. 2019-160316

NFTs are generally used to prove ownership of content data such as digital art. The inventors had the idea of associating with an NFT some rights that are exercisable by the owner of the NFT. Since rights are associated with NFTs, proof of ownership of the NFT also serves as proof of ownership of the rights.

However, if the procedures for exercising rights associated with NFTs are complicated, there is a risk that such NFTs will not be used. Therefore, in order to popularize NFTs with associated rights, it is desirable to facilitate the exercise of rights associated with NFTs.

Certain aspects of the present disclosure are computer-implemented methods. The method of disclosure is a computer-implemented method for exercising rights associated with non-fungible tokens on a blockchain, executed by a computer system, that provides operational indicia associated with the non-fungible tokens. , provided to the terminal for display on the terminal of the owner of the non-fungible token, and when the operation of the operation display is executed, the non-fungible token associated with the operation display is provided to the terminal of the owner of the non-fungible token. and performing processing related to rights associated with the rights.

Another aspect of the disclosure is a computer system. The disclosed system includes a display providing unit that provides an operation display associated with a non-fungible token to a terminal of the owner of the non-fungible token for display on the terminal of the owner of the non-fungible token; and a rights processing unit that executes processing regarding rights associated with the non-fungible token associated with the operation display when the operation is performed.

Another aspect of the present disclosure is a method of manufacturing a non-fungible token. The disclosed manufacturing method includes generating a non-fungible token having data for displaying an operation display on a screen, and the operation display is generated by a computer system to display a non-fungible token of the owner of the non-fungible token. The computer system is configured to be displayed on a screen on a terminal, and when the operation on the operation display is executed, the computer system performs processing regarding the rights associated with the non-fungible token associated with the operation display. configured to run.

Another aspect of the present disclosure is non-fungible tokens. The disclosed non-fungible token includes data for displaying an operation display associated with the non-fungible token on a screen, and the data is used to display an operation display associated with the non-fungible token by a computer system. a non-fungible token is provided to the terminal for display on the terminal of the owner of the non-fungible token, and when an operation on the operational display is performed, the non-fungible token associated with the operational display is Used to perform processing related to rights associated with bull tokens.

Further details are described in the embodiments below.

FIG. 1 is a schematic diagram of a computer system, etc. FIG. 2 is a diagram showing how to save NFT data. FIG. 3 is a diagram showing how to display NFT data. FIG. 4 is a flowchart illustrating procedures such as rights-related processing. FIG. 5 is an explanatory diagram showing the procedure for exercising rights. FIG. 6 is a flowchart showing the verification procedure. FIG. 7 is a flowchart illustrating an example of a product acquisition scenario.

<1. Overview of computer implementation method, computer system, and non-fungible token for exercising rights attached to blockchain non-fungible tokens>

(1) The method according to the embodiment is a computer-implemented method for exercising rights associated with non-fungible tokens of a blockchain, which is executed by a computer system, and includes: An operation indication is provided to the terminal for display on the terminal of the owner of the non-fungible token, and when the operation on the operation indication is executed, the operation indication is The non-fungible token associated with the display includes executing processing regarding rights associated with the non-fungible token. In this case, the non-fungible token holder's terminal displays an operating display for exercising rights, so the non-fungible token holder can operate the operating display to It is possible to cause a computer system to perform processing related to rights.

Note that the owner of the non-fungible token may be a person who can be substantially considered the owner. That is, the owner may be a user associated with the non-fungible token in the blockchain, in addition to the person recorded as the owner in the blockchain. The user may be recorded on the blockchain as being able to play at least some of the roles held by the owner of the non-fungible token. Therefore, the user may be considered a substantial owner in some cases. The user who can be considered a substantial owner is, for example, a tenant in a rentable non-fungible token. Since the borrower can use the non-fungible token in the same way as the owner, he can be regarded as the owner. A non-fungible token that can be rented is, for example, a rental NFT defined in Ethereum's EIP4907 standard. "user" in EIP4907 can be considered as the owner.

(2) Preferably, the rights include the right to obtain items. In this case, the owner of the non-fungible token can obtain the item by operating the operation display. The item may be a physical item or a digital item. Further, it is preferable that the item be set in advance in correspondence with the non-fungible token, or determined based on the non-fungible token.

(3) Preferably, the rights include the right to receive services. In this case, the owner of the non-fungible token can receive the service by operating the operation display. The service may be a service provided in the real world or an online service. Preferably, the service is preset corresponding to the non-fungible token or determined based on the non-fungible token.

(4) Preferably, the non-fungible token includes the operation display. In this case, it is preferable to display the non-fungible token on the screen because the operation display can also be displayed on the screen. Note that it is preferable that only the owner of the non-fungible token has the authority to operate the operation display.

(5) Preferably, the operation display is a button selected for exercising the right.

(6) Preferably, the method according to the embodiment further comprises verifying whether the operation on the operation display was performed by the owner of the non-fungible token. The verification may be a verification of whether the operator of the operation display is the owner of the non-fungible token.

(7) In (6) above, it is preferable that the verifying includes transmitting the non-fungible token to a predetermined destination after the operation of the operation display is performed.

(8) Preferably, the verifying includes comparing source data of the non-fungible token transmitted to the destination with data indicating an operator of the operation display.

(9) In (6) above, the verifying includes data indicating the owner of the non-fungible token recorded on the blockchain and data indicating the operator of the operation display. Preferably, the method further includes comparing.

(10) In the above (1), the method according to the embodiment further includes causing the owner to transmit the non-fungible token to a predetermined destination after the operation on the operation display is performed. It is preferable to prepare. By transmitting the non-fungible token, the owner of the non-fungible token can be made a non-owner, and subsequent use of the non-fungible token by the former owner can be restricted. Note that it is preferable that a limit is set on the number of times the operation display can be operated, and it is more preferable that the number of times that the operation display is operated is limited to one time.

(11) In (10) above, the method further comprises verifying whether the non-fungible token whose operation display was operated and the non-fungible token sent to the destination are the same. is preferable.

(12) Preferably, the operation display is not displayed on the screen of the terminal of the non-fungible token. In this case, it is possible to prevent anyone other than the owner from exercising the rights.

(13) Preferably, the operation display is displayed on a screen in a state in which the operation display cannot be operated on a terminal other than the owner of the non-fungible token. In this case, it is possible to prevent anyone other than the owner from exercising the rights.

(14) The computer system according to the embodiment includes a display providing unit that provides an operation display associated with a non-fungible token to the terminal for display on the terminal of the owner of the non-fungible token. and a rights processing unit that executes processing related to rights associated with the non-fungible token associated with the operation display when the operation of the operation display is performed.

(15) Preferably, the computer system according to the embodiment further includes a verification unit that verifies whether the operation on the operation display is performed by the owner of the non-fungible token.

(16) Preferably, the computer system further includes a verification unit that verifies whether the exercise of the right is appropriate.

(17) The non-fungible token manufacturing method according to the embodiment may include generating a non-fungible token having data for displaying an operation display on the screen. The operation display may be configured to be displayed on the terminal of the owner of the non-fungible token by a computer system. The computer system may be configured to perform processing regarding rights associated with the non-fungible token associated with the operation display when the operation display is operated.

(18) The non-fungible token according to the embodiment includes data for displaying an operation display associated with the non-fungible token on a screen, and the data is transmitted to the non-fungible token by a computer system. The operation display associated with the non-fungible token is provided to the terminal for display on the terminal of the owner of the non-fungible token, and when the operation of the operation display is executed, the operation display is associated with the operation display. The non-fungible token may be used to perform processing related to the rights associated with the non-fungible token.

<2. Computer implementation method, computer system, method for producing non-fungible tokens and examples of non-fungible tokens for exercising rights attached to non-fungible tokens of blockchain>

FIG. 1 shows an example of a computer system 10 (hereinafter simply referred to as "system 10") according to an embodiment. The system 10 uses non-fungible tokens 101 (NFTs 101) recorded on the blockchain 11 to support the exercise of rights associated with the NFTs 101. In the following, as an example, the system 10 provides a service that mediates online between a person 210 exercising a right and a person 220 receiving the exercise of the right in order to exercise the right. That is, the system 10 of the embodiment supports enforcement of rights associated with the NFT 101. Note that the person 220 receiving the exercise of rights may be the administrator of the system 10.

In embodiments, an owner 210 of an NFT 101 may exercise rights associated with that NFT 101. The owner 210 of the NFT 101 and its changes are recorded on the blockchain 11. That is, the person who can exercise the rights associated with the NFT 101 is the NFT owner 210 recorded on the blockchain 11. When the NFT 101 is transferred, the rights associated with the NFT 101 are also transferred. The system 10 treats the owner 210 of the NFT 101 as a person (right holder) who can exercise the rights associated with the NFT 101. Note that in the system 10 according to the embodiment, transfer (transmission) of the NFT 101 with associated rights may be prohibited.

Note that the system 10 can identify the owner 210 of the NFT 101, that is, the owner of the rights, by referring to the blockchain 11. System 10 may identify rights associated with NFT 101 using data indicating a correspondence between NFT 101 and rights associated with NFT 101. Further, the system 10 can identify the person 220 who is to exercise the right associated with the NFT 101 using data indicating the correspondence between the NFT 101 and the person 220 who is the recipient of the exercise of the right associated with the NFT 101 .

NFT 101 is generated by tokenizing digital data. The NFT manufacturing method according to the embodiment includes generating an NFT 101. Tokenization is also called NFTization. The digital data converted into NFT is recorded on the blockchain 11. Note that the digital data converted into NFT may include data recorded outside the blockchain 11.

The digital data to be converted into NFT is, for example, image data, text data, audio data, other data, or a combination of two or more of these data. The digital data may be hypertext. The digital data may include data that appears on the screen (display data) when the NFT 101 is displayed on the display.

At least a portion of the digital data to be converted into NFT may be stored in a database 13 outside the blockchain 11. Hereinafter, the digital data to be tokenized and stored in the database 13 outside the blockchain 11 will be referred to as NFT data 13A.

The digital data to be converted into an NFT may include data indicating the content of the rights associated with the NFT 101, as described below. Since the NFT 101 includes data indicating the content of the right, the NFT 101 itself can become data indicating the correspondence between the NFT 101 and the rights associated with the NFT 101. Further, the digital data to be converted into an NFT may include data indicating the person 220 who receives the exercise of the right associated with the NFT 101. Since the NFT 101 includes data indicating the person 220 who receives the exercise of the right, the NFT 101 itself can become data indicating the correspondence between the NFT 101 and the person 220 who receives the exercise of the right associated with the NFT 101. Note that data indicating these correspondences may be recorded in a computer outside the blockchain 11, such as the server 12.

The right associated with the NFT 101 is, for example, the right to request some kind of action from the third party 220 who receives the exercise of the right. The right is, for example, the right to obtain an item or the right to receive a service. In this case, the party 220 receiving the exercise of rights is the item provider or the service provider. Note that the person receiving the item or service does not need to be the owner 210 of the NFT 101, and may be one designated by the owner 210 of the NFT 101. The owner 210 of the NFT 101 can present an item or service by designating someone other than himself as the recipient of the item or service.

As described later, the NFT 101 of the embodiment includes a user interface 13B (UI 13B) for user operations. The user interface is, for example, a graphical user interface (GUI). The NFT 101 having the UI 13B can be configured, for example, by using the NFT data 13A as a source code written in the HTML language for creating a web page or the like. The NFT data 13A may include image data. As a result, the NFT data 13A is displayed on the screen of the user's terminal 30, and user operations such as selection operations are enabled on the terminal 30. That is, according to this embodiment, the NFT 101 having the UI 13B for operation is obtained. Note that the data 13A for providing the NFT 101 with the UI 13B may be recorded on the blockchain 11. Preferably, the UI 13B can be operated only by the owner of the NFT 101.

Since the system 10 is configured to execute some processing using execution of an operation using the UI 13B as a trigger, processing by the system 10 can be called by a user's operation on the NFT 10. By providing the UI 13B in the NFT 101, it is possible to limit those who can operate the UI 13B to the owner of the NFT 10. Further, since the NFT 101 has the UI 13B, the application program 30C of the terminal 30 or the application program 12C of the server 12 that handles the NFT 101 does not need to have the UI 13B that the NFT 101 has. Note that the process called by the operation using the UI 13B of the NFT 101 may be executed by the server 12, by the smart contract 130, or by cooperation between the server 12 and the smart contract 130. good.

In the embodiment, the NFT 101 includes data 13A for displaying the operation display 13B associated with the NFT 101 on the screen. This data 13A is provided by the system 10 to the terminal 30 for display on the screen of the terminal 30 of the owner 210 of the NFT 101, and when the operation display 13B is executed, the operation display 13B It is used to execute processing associated with the NFT 101 associated with the NFT 101 .

The NFT 101 may have a link to the NFT data 13A in order to associate the NFT 101 recorded on the blockchain 11 with the NFT data 13A with data stored in the database 13 outside the blockchain 11. . A link may be constituted by a unique resource identifier (URI), for example.

Further, in order to associate the NFT 101 with the NFT data 13A, the data 13A may be configured to allow only the owner of the NFT 101 to refer to the NFT data 13A.

For example, the database 13 controls external access to stored data. If the access is from the owner of the NFT 101 associated with the NFT data 13A, the database 13 can permit access to the NFT data 13A associated with the NFT 101 owned by that person. Furthermore, if the access is from someone other than the owner of the NFT 101 associated with the NFT data 13A, the access may be denied. That is, the NFT data 13A is displayed on the terminal of the owner of the NFT corresponding to the NFT data 13A, but is not displayed on terminals other than the owner of the NFT corresponding to the NFT data 13A. Note that the database 13 may permit access from a third party other than the owner of the NFT 101 associated with the NFT data 13A. When allowing access from a third party, the permission may be limited; for example, it may allow access to some data included in the data that constitutes the NFT data, but it may not allow access to other data. Access to data may be prohibited. Furthermore, although the NFT data 13A can be referenced by a third party, it is preferable that the setting is such that the user interface displayed by the NFT data 13A cannot be operated.

As described above, the NFT data 13A stored in the database 13 can be displayed on the screen of the user's terminal 30. The NFT data 13A is configured to display the operation display 13B on the screen. That is, the NFT 101 includes an operation display 13B. The operation display 13B may be recorded on the blockchain 11.

The operation display 13B is, for example, a selection button selected for exercising the right associated with the NFT 101. The operation display 13B may be displayed on the screen as a part of the NFT 101 displayed on the screen when the NFT 101 is displayed on the screen of the terminal 30. That is, the NFT 101 can be displayed on the screen so as to include the operation display 13B as a part thereof. Note that the operation display 13B may be displayed on the screen not in the area inside the NFT 101 displayed on the screen, but in an area outside the NFT 101 displayed on the screen. In this case, the NFT 101 and the operation display can be visually recognized as separate items.

The system 10 of the embodiment utilizes the blockchain 11. The blockchain 11 is configured by a P2P (Peer to Peer) computer network system in which multiple computers are interconnected.

In the blockchain 11, tokens such as NFT 101 can be traded between blockchain addresses, and token transaction records are recorded in the distributed ledger of the blockchain 11. The blockchain address indicates a user account 110 on the blockchain 11, for example. For example, when a certain user has an account 110 on the blockchain 11, the account 110 has a predetermined blockchain address (user address). In FIG. 1, the user account 110 is represented by "0x1111" as an example.

In order to ensure non-fungibility, the NFT 101 has a unique identifier in the blockchain 11 to enable it to be distinguished from other NFTs. Hereinafter, this identifier will be referred to as an NFT identifier. The NFT identifier is sometimes written as "NFT_ID." In the following, it is assumed that the NFT identifier (NFT_ID) of the NFT 101 is represented by "id01".

In the embodiment, the association between the NFT data 13A and the NFT 101 is realized, for example, by associating the NFT data 13A with the NFT_ID:id01 of the corresponding NFT 101 and storing it in the database 13. When one NFT data 13A is associated only with NFT_ID:id01 of one corresponding NFT 101, a one-to-one correspondence between the NFT 101 and the NFT data 13A is realized.

Note that one NFT data 13A may be associated with NFT_IDs of multiple NFTs 101. If the data for each of the plurality of NFT data 13A may be the same, one NFT data 13A may be associated with the NFT_ID of the plurality of NFTs 101.

The owner (and owner history) of the NFT 101 is recorded on the blockchain 11. Therefore, the owner of the NFT 101 does not need to be centrally managed, and the owner of the NFT 101 can be easily managed and confirmed. The ownership of the NFT 101 can be easily proven by the records on the blockchain 11.

As mentioned above, proof of ownership of NFT 101 also serves as proof of ownership of rights associated with NFT 101. In the embodiment, since the record of the owner of the NFT 101 recorded in the blockchain 11 can be used as the record of the right owner, management of the right owner (including management of changes in the right owner) is possible. ) does not need to be performed intensively and is easy to manage. Furthermore, it is also possible to trade (sell/assign to a third party) the NFT 101 as necessary for rights trading.

In embodiments, blockchain 11 may include smart contracts 130. The smart contract 130 is software (computer program) that is executable on the blockchain and automatically executes a predetermined protocol. Smart contract 130 has a contract address 140 that is a blockchain address. Smart contract 130 is stored at contract address 140. As described below, the contract address 140 may receive the NFT 101 associated with the exercised right (the exercised right NFT 101).

In the blockchain 11, NFTs 101 owned by users are recorded in association with user accounts 110.

The fact that a token is recorded in association with a user account (blockchain address) can also be said to be ``the account (blockchain address) owns the token.''

In FIG. 1, user account 110 owns NFT 101. That is, the owner of the NFT 101 shown in FIG. 1 is the user 210 who has the user account 110. Therefore, the owner of the rights associated with NFT 101 is user 210 who has user account 110.

The blockchain 11 is provided with an account 120 for collecting the NFT 101 as necessary. The collection account 120 is an account for receiving the NFT 101 whose rights have been exercised. The exercised NFT 101 may be received by the contract address 140 of the smart contract, as described above, but may also be received by a collection account 120 that is separate from the contract address 140.

Here, the NFT 101 whose rights have been exercised is also referred to as an "invalid NFT." The collection account 120 has a blockchain address of "0x5555", for example. In the blockchain 11, the collection account 120 is provided as an account for the administrator of the system 10, for example. The NFT 101 sent to the collection account 120 is never taken out from the collection account 120. Therefore, NFTs (invalid NFTs) sent to the collection account 120 are effectively non-tradable on the blockchain 11. Further, the NFT 101 received by the contract address 140 can also become an invalid NFT since it is virtually impossible to trade on the blockchain 11.

The system 10 according to embodiments may include a server 12 that is external to the blockchain 11. The system 10 may include the above-mentioned smart contract 130 as its component, if necessary. That is, the system 10 may include the server 12 but not the smart contract 130, or may include the smart contract 130 but not the server 12. System 10 may include both a server 12 and a smart contract 130. The division of roles between the server 12 and the smart contract 130 can be set as appropriate.

The server 12 is connected to a network 15 such as the Internet. The server 12 is operated by, for example, an administrator of the system 10. The server 12 is configured by a computer including a processor 12A and a memory 12B (storage device 12B). The server 12 may be configured by one computer, or may be configured by multiple computers connected via the network 15. For example, the server 12 may include a database 13. Memory 12B is connected to processor 12A. The memory 12B includes, for example, a primary storage device and a secondary storage device. The primary storage device is, for example, a RAM. The secondary storage device is, for example, a hard disk drive (HDD) or a solid state drive (SSD). Memory 12B includes a computer program 12C executed by processor 12A. Processor 12A reads and executes computer program 12C stored in memory 12B. Computer program 12C has program code that represents instructions executed by a computer functioning as server 12.

The server 12 can function as a display providing unit, a rights processing unit, and a verification unit, which will be described later, by having the computer program 12C executed by the processor 12A. That is, the server 12 may include a display providing section. The server 12 may include a rights processing unit. Server 12 may include a verification unit.

A user 210 who is the owner of the NFT 101 has a user terminal 30. The user terminal 30 is, for example, a mobile device such as a smartphone or a tablet. User terminal 30 is connectable to network 15 . The user terminal 30 is configured by a computer including a processor 30A and a memory 30B. Memory 30B is connected to processor 30A. The memory 30B includes, for example, a primary storage device and a secondary storage device. The primary storage device is, for example, a RAM. The secondary storage device is, for example, a hard disk drive (HDD) or a solid state drive (SSD). Memory 30B includes a computer program 30C executed by processor 30A. Processor 30A reads and executes computer program 30C stored in memory 30B. Computer program 30C has program code that indicates instructions to be executed by a computer functioning as user terminal 30.

The computer program 30C is, for example, a wallet application program for displaying the tokens stored in the user account 110 of the blockchain 11 on the user terminal 30. The wallet application program provides functionality that allows user operations for storing tokens, sending tokens, and receiving tokens.

The computer program 30C also includes a program code for displaying a token (NFT or fungible token) associated with the user account 110 in the blockchain 11 on the display of the user terminal 30. When displaying the NFT 101, the computer program 30C displays the NFT 101 and the NFT data 13A associated with the NFT 101.

On the user's terminal 30, the NFT data 13A associated with the NFT 101 of which the user 210 is the owner is displayed, but the NFT data associated with the NFT of which the user 210 is not the owner is displayed. It is preferable not to. In order to prevent the data from being displayed on a terminal other than the owner of the NFT associated with the data in the database 13, the database 13 stores data from the owner 210 of the NFT 101 associated with the NFT data 13A to the NFT data 13A. It is preferable that access control is performed so that access to the NFT data 13A is permitted, but access to the NFT data 13A is not permitted from anyone other than the owner. Note that the database 13 can grasp the owner 210 of the NFT 101 associated with the NFT data 13A by referring to the blockchain 11.

FIG. 2 shows an example of a method for displaying the NFT data 13A associated with the NFT 101 on the terminal 30 of the user 210 who is the owner of the NFT 101. The user 210 signs in to the user's 210 account on the server 12 via the terminal 30 (step S201). Sign-in is performed by, for example, an application program installed on the terminal 30. At the time of this sign-in, the server 12 can acquire the blockchain address 110 (user account 110 in the blockchain) of the user 210 from the user terminal 30.

The server 12 having the blockchain address 110 of the user 210 accesses the blockchain 11 (step S202). The server 12 refers to the record 11B of one or more NFTs owned by the blockchain address 110 of the user 210 in the blockchain 11, and obtains information 120A (for example, NFT_ID) about the one or more NFTs owned by the user 210. can be obtained (step S203).

When displaying the NFT owned by the user 210 on the user's terminal 30, the server 12 accesses the database 13 to refer to the NFT data 13A stored in the database 13. That is, the server 12 calls the database 13 to refer to the NFT data 13A (step S204).

The server 12 transmits the blockchain address of the user 210 to the database 13 in order to refer to the NFT data 13A associated with the NFT 101 owned by the user 210. The database 13 that has received the blockchain address of the user 210 accesses the blockchain 11 in order to refer to the NFT 101 owned by the user 210 indicated by the blockchain address 110 (step S205). Through this access, the database 13 acquires the NFT_ID of the NFT owned by the user (step S206).

When the database 13 receives a call using the user's blockchain address 110, in response to the call, the database 13 allows access to the NFT data 13A associated with the NFT 101 owned by the user 210. That is, the database 13 refers to the NFT_ID of the NFT 101 owned by the user 210 in the blockchain 11 (step S205), and uses the NFT_ID of the NFT 101 owned by the user from among the NFT data stored in the database 13. Access to the associated NFT data 13A is permitted.

Through the above processing, the server 12 can acquire the NFT data 13A associated with the NFT 101 with NFT_ID: id01 owned by the user. The acquired NFT data 13A is transmitted to the user terminal 30 for display on the user terminal 30 (step S207).

Note that the association between the NFT 101 and the NFT data 13A may be realized by, for example, the NFT 101 having a URI (Uniform Resource Identifier) that indicates the NFT data 13A. Further, when the server 12 has the NFT data 13A, the server 12 simply determines the NFT data 13A associated with the NFT 101 owned by the user 210, and transfers the NFT data 13A to the user terminal 30. Just provide it.

Now, the right to obtain the above-mentioned item is, for example, the right to obtain a product or the right to obtain a prize. The right to obtain a product is, for example, the right to have the purchased product delivered from the product seller or product manufacturer. For example, a person who purchases a product obtains an NFT 101 with the right to obtain the product instead of receiving the actual product. The NFT 101 is provided to a purchaser from a product seller or product manufacturer, for example. The purchaser can leave the product without exercising his rights until he needs the actual product. If the purchaser needs the actual product, he or she can exercise his or her rights and receive delivery of the product. In other words, the NFT 101 can function as an exchange ticket for a product. Further, even if the NFT 101 is traded and the owners of the NFT 101 and the rights change, the products associated with the NFT 101 do not need to be distributed from time to time. If the owner of the NFT 101 after being circulated wants to obtain the actual product, he or she can obtain the actual product by exercising the right to obtain the product associated with the NFT 101.

For example, wine, sake, or other alcoholic beverages may be desired to be stored for a long period of time in order to age, but it is often possible to ensure better storage conditions if the seller or manufacturer stores the wine, sake, or other alcoholic beverages than the purchaser. The owner of NFT101 does not exercise the right during the aging period and has the seller or manufacturer preserve it, and when it is ready to drink, can exercise the right to purchase a product (alcoholic beverage) that is in good condition. can be obtained.

Further, the owner of the NFT 101 can also sell the NFT 101 along with the rights to a third party. Since the rights are attached to the NFT 101, they are transferred when the NFT 101 is transferred. In this case, the transaction is easy because it is sufficient to buy and sell the NFT 101 and there is no need to deliver the actual product. Furthermore, depending on the product, the quality may deteriorate if it is repeatedly distributed for trading purposes, so it may be better to avoid frequent distribution as much as possible. In the embodiment, even if the NFT 101 is distributed from time to time, the actual product does not need to be distributed from time to time, so deterioration in quality can be prevented. Furthermore, although there is a possibility that a product that has been widely distributed may be a fake, in the embodiment, the actual product can be delivered from a reliable product seller or product manufacturer, so there is less worry about counterfeits. The same applies to other items other than products.

Note that items such as products do not need to actually exist at the time of the first sale of the NFT 101. For example, an item such as a product may be one that is scheduled to be manufactured in the future.

The right to obtain the above-mentioned prize is, for example, the right to have the prize given in a lottery handed over by the prize provider. A person who wins a prize can obtain an NFT 101 with the right to obtain the prize instead of receiving the actual prize. In other words, NFT01 can function as a gift voucher. Other points are the same as in the case of products.

The right to receive a service is, for example, the right to have a purchased service provided by a service provider. For example, in exchange for actually receiving the service, a person who purchases a service obtains an NFT 101 attached with the right to receive the service. The NFT 101 is provided, for example, from a service provider to a purchaser. The purchaser can leave the right without exercising the right until the actual service is needed, and once the actual service is needed, the purchaser can exercise the right and receive the service. can. In other words, the NFT 101 can function as a service usage ticket. Note that the service does not have to be something that can be bought or sold, and may be, for example, a preferential service such as a discount on the price of a product or service.

When the right to receive the service is exercised, items for use by the service recipient may be provided to the service recipient. The item provided for use by the person receiving the service is, for example, a ticket for using the service or a discount coupon. In other words, the right to receive the service may be the right to obtain a ticket or the like for receiving the service.

As described above, the digital data to be converted into an NFT may include data indicating the content of the rights associated with the NFT 101. That is, the NFT 101 may have data indicating the content of the rights associated with the NFT 101. If the NFT 101 has data indicating the contents of the rights associated with the NFT 101, the system 10 can identify the rights associated with the NFT 101 by referring to the NFT 101 recorded on the blockchain 11. Furthermore, by referring to the NFT 101 recorded on the blockchain 11, the system 10 can identify the person receiving the exercise of the rights associated with the NFT 101.

If the right is the right to obtain an item, the data indicating the content of the right may include, for example, the identifier of the provided item, the item name, the item description, the name of the item provider, the identifier of the item provider, and the item. It may include at least one piece of data on the available period (right validity period). If the right is the right to receive a service, the data indicating the content of the right may include, for example, the identifier of the service provided, the name of the service, the description of the service, the name of the service provider, the location of the service, and the item provider. The data may include at least one of an identifier and a service provision period (right validity period).

Note that the specific item or service does not need to be determined in advance, and may be determined after the right is exercised. For example, the right may be the right to enter a lottery to win an item or service. A right may also be a right to obtain an item or a right to receive a service, with the specific item or service to be provided being determined upon exercise of the right. In this case, the system 10 may perform processing to determine the specific item or service to be provided after the right is exercised. A specific item or service may be randomly determined in the system 10 from among item candidates or service candidates that are preset in association with the NFT 101, or may be determined according to a predetermined rule. In this way, the item or service may be preset in relation to the NFT 101, or may be determined after an exercise operation based on the NFT 101.

In addition, if the specific item or service is determined after the right is exercised, the provider of the product or service (the person receiving the exercise of the right) shall be determined after the specific item or service is determined. obtain.

FIG. 3 shows, as an example, a state in which NFT data 13A associated with NFT 101 owned by user 210 is displayed on user terminal 30. Here, it is assumed that the NFT 101 is associated with the right to obtain an item called Junmai Daiginjo, which is a type of Japanese sake. In other words, the NFT 101 functions as an exchange ticket for Junmai Daiginjo. The NFT data 13A includes an image 13C showing the item as well as a user interface 13B for the user to perform an operation to obtain the item.

As shown in FIG. 3, the user account 110 of the user 210 owns the NFT 101, and the user 210 who has the account 110 is the owner of the NFT 101. As shown in FIG. 3, a display 33 showing the NFT 101 stored in the account 110 of the user 210 is displayed on the display 31 of the user terminal 30 that the user 210 has. In the following, the display 33 in FIG. 3 will be referred to as an NFT display 33. Here, as an example, the NFT display 33 includes an image indicating an item (an image including an item called Junmai Daiginjo) 13C and an operation display 13B. The operation display 13B is, for example, a selection button.

The NFT data 13A is stored in the database 13 so that the user who is recorded in the blockchain 11 as the owner of the NFT 101 (NFT 101 with NFT_ID: id01) associated with the NFT data 13A is allowed to refer to it. It is preserved. Further, the user's terminal 30 is configured to display the NFT data 13A of the NFT 101 (NFT 101 whose NFT_ID: id01) owned by the user on the screen as the NFT display 33. Therefore, as shown in FIG. 3, if the user owns the NFT 101, the user's terminal 30 can display the NFT data 13A stored in the database 13 on the screen.

The terminal 30 can display on the display 31 the NFT display 33 generated from the data included in the NFT data 13A. By displaying the NFT display 33 on the display 31, the user can confirm the item or service associated with the NFT 101. The NFT display 33 includes an operation display 13B. The server 12 can transmit the NFT data 13A to the terminal 30 in order to provide the terminal 30 with the NFT display 33 including the operation display 13B. In this way, the server 12 can function as a display providing unit that provides the operation display 13B associated with the NFT 101 to the terminal 30 for display on the terminal 30 of the owner 210 of the NFT 101. Accordingly, system 10 may include a display provider.

By operating the operation display 13B included in the NFT display 33, the user 210 can cause the system 10 to execute processing related to the exercise of rights associated with the NFT 101. In this way, the system 10 according to the embodiment provides the operation display 13B associated with the NFT 101 to the terminal 30 for screen display on the terminal 30. In the system 10, the operation display 13B is associated with rights-related processing that the system 10 should execute. When the operation display 13B is operated, the system 10 executes processing related to the rights associated with the operation display 13B. Since the operation display 13B is associated with the NFT 101 and the NFT 101 is associated with a right, the system 10 can identify the right associated with the operation display 13B from the NFT 101 associated with the operation display 13B. . In this way, the server 12 can function as a rights processing unit that executes processing regarding rights associated with the NFT 101 associated with the operation display 13B when the operation display 13B is operated. Accordingly, system 10 may include a rights processor.

Note that it is preferable that the operation display 13B is not displayed on the screen of a terminal other than the owner of the NFT 101, or that the operation display 13B is displayed on the screen of a terminal other than the owner of the NFT 101 in a state in which the operation display 13B cannot be operated. In this case, operation by anyone other than the owner can be prevented. Note that even if the operation display 13B is not displayed on a terminal other than the owner, the NFT display 33 (NFT data 13A) other than the operation display 13B may be displayed on a terminal other than the owner. In other words, the NFT data 13A other than the operation display 13B may be visible to a person other than the owner. Since the NFT data 13A other than the operation display 13B can be referenced by a person other than the owner, for example, when the NFT 101 is resold, a person wishing to purchase the NFT 101 can view the operation display 13B before purchasing. The NFT display 33 not included can be displayed on the screen for reference. Moreover, when the operation display 13B is displayed on the screen in a state where it cannot be operated, it is preferable that the NFT displays 33 other than the operation display 13B are also displayed on the screen.

FIG. 4 shows an example of a procedure for exercising the right to obtain an item. First, the user 210 receives the NFT 101 using the terminal 30 (step S431). Thereby, the user becomes the owner of the NFT 101. In other words, the user 210 has acquired the right to obtain the item. Although the source of the NFT 101 received by the user 210 is not particularly limited, the source is, for example, a seller of the NFT 101. The seller of the NFT 101 is, for example, the seller or manufacturer of the item.

The user 210 causes the NFT display 33 of the NFT 101 to be displayed on the screen of the user's terminal 30 by performing an operation on the terminal 30 to display the NFT 101 on the terminal 30 (step S432; see FIG. 5). To display the NFT display 33 on the screen, for example, a list of NFTs 101 owned by the user 210 (for example, a list of thumbnails showing the NFTs 101) is displayed on the display of the terminal 30 using an application program of the terminal 30 or the server 12. The user 210 can perform an operation to select the displayed NFT 101 from the list. The system 10 provides the NFT display 33 of the selected NFT 101 to the terminal 30. Note that the user 210 signs in to the server 12 via the terminal 30 before the NFT display 33 is displayed on the screen. For example, the blockchain address of the user 210 is used for signing in. Server 12 may identify signed users by their blockchain addresses.

The NFT display 33 is provided, for example, by the server 12 (step S410). The server 12 may provide the terminal 30 with an NFT display 33 having an operation display 13B. If the user wishes to obtain the actual item, the user performs an item exchange operation (step S433). As shown in FIG. 5, the exchange operation is performed by the user tapping the operation display 13B (exchange button 13B) included in the NFT display 33 with a finger F or clicking with a mouse or the like.

When the operation on the operation display 13B is executed, processing regarding rights is started in the system 10. The operation display 13B includes, for example, a link (such as a URI) to the server 12 that executes processing related to rights. When the operation display 13B (exchange button 13B) is selected, the terminal 30 uses the link to access the server 12 that executes rights-related processing. When accessing the terminal 30, the terminal 30 can transmit information (NFT information) held by the NFT 101 corresponding to the operation display 13B to the server 12. The NFT information here is information recorded in the blockchain 11 or the database 13 as NFT digital data. The NFT information may be, for example, at least one of a token identifier (NFT_ID) for identifying the NFT 101 and a rights identifier (item identifier) for identifying the right to be exercised. Note that the server 12 may obtain the NFT information by referring to the blockchain 11.

Returning to FIG. 4, upon receiving access from the terminal 30, the server 12 that executes rights-related processing identifies the content of the right that the user intends to exercise (step S411). Identifying the content of the rights may include, for example, identifying the items or services provided to the user. Also, identifying the content of the rights may include identifying the provider of the item or service provided to the user. The items or services provided to the user may be identified by the server 12 by referring to the blockchain 11, may be preset in the server 12, or may be identified by the server 12 after the operation in step S433 is performed. 12 may be determined.

For example, if the content of the rights associated with the NFT 101 is recorded in the blockchain 11, the server 12 refers to the record in the blockchain 11 regarding the NFT 101 having the operation display 13B operated by the user 210. This allows the content of the right to be identified. The content of the identified right is, for example, at least one of the identifier of the provided item, the item name, the item description, the name of the item provider, the identifier of the item provider, and the period during which the item can be obtained (right validity period). That's all.

If the content of the rights associated with the NFT 101 is recorded in the server 12, the server 12 may include, for example, correspondence data that associates the token identifier of the NFT 101 with data indicating the content of the rights. When the server 12 is provided with correspondence data, the server 12 can identify the content of the right associated with the operated NFT 101 by acquiring the token identifier of the operated NFT 101 from the terminal 30.

Subsequently, the server 12 provides the terminal 30 with a setting display 500 regarding the exercise of rights associated with the operation display 13B (step S412). The setting display 500 is displayed on the display of the terminal 30. In the settings display 500, settings regarding the exercise of rights are executed by the user 210 (step S434). As shown in FIG. 5, the settings related to the exercise of rights are, for example, settings for the delivery destination of the item. The user 210 can complete the settings by operating the completed operation display 501. The completed operation display 501 is, for example, a confirm button. The completion operation is executed by the user tapping the completion operation display 501 with the finger F or clicking with a mouse or the like.

Returning to FIG. 4, when the settings by the user are completed, the settings are transmitted from the terminal 30 to the server 12 (step S435) and stored in the server 12. The saved settings can be used for subsequent processing (such as step S415) by the server 12.

Settings related to the exercise of rights may be set by users online, for example, for general online sales of items, provision of services, reservations for provision of services, or application of discount services at the time of sale. It can be similar. The set contents can be transmitted from the server 12 to the terminal 40 of the person 220 (for example, the provider of the item or service) who receives the exercise of the right.

For example, if the right is the right to obtain an item, the settings related to exercising the right may include at least one of the settings for delivery of the item and the desired date and time for delivery of the item. Setting an item's shipping destination may include setting a shipping destination's name and address. Setting a delivery destination for an item may include setting a phone number or email address for the delivery destination. The delivery destination may be set by the user 210 manually inputting the name, address, etc., or the system 10 allows the user to set the delivery destination from among delivery destination candidates preset in association with the user who has exercised the right. This may be done by selecting. Settings regarding the exercise of rights may include selection of items that the user wishes to obtain. Note that the item may be a tangible object or a digital item.

If the right is the right to receive a service, settings related to exercising the right may include, for example, settings for information necessary to receive the service. The information necessary to receive the service may include, for example, information on the person receiving the service. The information on the person receiving the service may include, for example, at least one of the name, address, telephone number, e-mail address, SNS account, gender, and age of the person receiving the service. The information on the person receiving the service may be set by the user 210 manually inputting the name, etc., or the system 10 may select one of the candidates set in advance in association with the user who has exercised the right. This may be done by the user making a selection from among the options. Settings regarding the exercise of rights may include selection of a service that the user desires to provide. Note that the service may be a service provided in the real world or may be a service provided online.

Note that the setting of information on the person receiving the service may be, for example, a setting as the destination of an item such as a ticket to be used by the person receiving the service.

Setting of information necessary to receive a service may be, for example, setting of details regarding the service. Details regarding the service may include, for example, at least one of the date and time of receiving the service, the location of receiving the service, and the type of service. For example, if the service provided is holding an event, transporting people by means of transportation, etc., setting details regarding the service may include seat designation.

If the right is the right to receive a discount service, settings regarding the exercise of the right may include selection of items or services to which the discount service is applied.

Note that the settings related to the exercise of rights do not need to be accompanied by user operations (step S434). For example, if the system 10 already has information (such as name and address) of the user who has exercised the right, the system 10 sets the information of the user as the recipient of the item or service. be able to. In this case, the user operation (step S434) may be omitted.

The server 12 may perform validation regarding the exercise of rights (step S413). The verification in step S413 is to verify whether the exercise of the right is appropriate, and more specifically, it may be to verify whether the operator of the operation display 13B is the owner of the NFT 101. By performing the verification, it is possible to prevent non-owners of the NFT 101 from exercising their rights. Unauthorized exercise of rights is, for example, an attack in which a non-owner of the NFT 101 attempts to receive an item or service illegally by sending data indicating the settings related to exercise of rights to the server 12. . Note that the operator of the operation display 13B may also be referred to as the source of data indicating the content of settings related to the exercise of rights. Further, the verification in step S413 may be performed after step S412 or before step S412.

In step S414, the process branches depending on whether the operator is the owner of the NFT 101. As a result of the verification in step S413, if it is determined that the operator is the owner of the NFT 101, the server 12 transmits the settings regarding the right exercise to the terminal 40 of the person receiving the right exercise (step S415). Settings related to exercising rights may include information indicating items or services related to exercising rights. If it is determined that the operator is not the owner of the NFT 101, the server 12 executes error processing (step S417). If the error process is executed, step S415 is not executed, and therefore, the right is not exercised.

In this way, the server 12 can function as a verification unit that verifies whether the operator of the operation display 13B is the owner of the NFT 101. Accordingly, system 10 may include a verifier.

The person receiving the exercise of rights here is, for example, the item provider 220. Note that the person receiving the exercise of the right, such as the item provider 220, can be identified in step S411 as one piece of information indicating the content of the right.

Settings related to the exercise of rights may include settings for the delivery destination of the item, as described above. The person 220 who has received the exercise of the right takes action to realize the exercise of the right in accordance with the settings regarding the exercise of the right. For example, the item provider 220 receives settings for sending a certain item to a certain delivery destination from the server 12, and performs procedures to send the item to the delivery destination (step S441). The item is delivered to the destination, for example by a delivery company.

After step S415, the server 12 may provide a reminder 600 of the exercise of rights to the user's terminal 30 (step S416). A display 600 indicating a copy is displayed on the display of the terminal 30. Note that the copy data may be a tokenized NFT.

FIG. 6 shows an example of the verification procedure in step S413. In step S61, the server 12 requests the terminal 30 of the user 210 who performed the operation for exercising the right to transmit the NFT 101 used for exercising the right to a predetermined destination. The user 210 performs an operation to transmit the NFT 101 from the server 12 to a specified destination. Thereby, the NFT 101 is transmitted to the specified destination (step S62). The destination is, for example, a management address managed by the administrator of the system 10. The management address is a blockchain address that can receive NFTs. The management address may be the contract address 140 where the smart contract 130 shown in FIG. 1 is stored, or the NFT collection address 120.

The fact that the NFT 101 used for exercising the right was sent to a predetermined destination is itself a factor that can be used to determine that the exercise of the right was appropriate. That is, if the NFT 101 associated with the exercised right is sent to a predetermined destination, the system 10 can determine that the exercise of the right was appropriate. Sending the NFT 101 is something the owner of the NFT 101 can do, and it also means losing ownership, so the fact that such a transmission occurred means that the exercise of rights was done by the owner of the NFT 101. can be guaranteed.

Further, by transmitting the NFT 101 used for exercising rights to a predetermined destination, the person who was the owner of the NFT 101 is no longer the owner and cannot use the NFT 101. That is, the NFT 101 becomes an invalid NFT, and its use thereafter is stopped. When a right is exercised, the exercise of the right associated with the NFT 101 can be limited to one time by invalidating the NFT 101. Note that invalidating an NFT is also referred to as a BAN.

In the embodiment, in order to perform even more reliable verification, the server 12 uses data on the source of the NFT 101 (the owner before the transmission of the NFT 101) transmitted to the management address for verification. As described above, there is a possibility that a non-owner of the NFT 101 may carry out an attack in which the non-owner of the NFT 101 performs an unauthorized right exercise operation and sends data indicating settings related to the right exercise to the server 12. To confirm that it is not such an attack, for example, the server 12 determines whether the sender of the NFT 101 and the sender of the settings related to rights exercise (for example, the settings of the item delivery destination) match. do it. If both transmission sources match, the server 12 can determine that the transmission source of the settings related to rights exercise (setting of item delivery destination) is the owner (transmission source) of the NFT 101 and is not an attack.

For such determination, for example, the server 12 acquires the source data of the NFT 101 sent to the management address (step S63). Since the transmission record (transaction record) of the NFT 101 is recorded in the blockchain 11, the server 12 can obtain the transmission source data of the NFT 101 by referring to the transaction record of the blockchain 11. The source data of the NFT 101 is, for example, the blockchain address 110 of the user 210 who was the owner of the NFT 101.

The server 12 compares the source of the NFT 101 and the source of the settings related to rights exercise (step S64). When the server 12 receives the settings related to the exercise of rights from the terminal 30, it can grasp the source of the settings related to the exercise of rights. The source of the settings related to the exercise of rights is, for example, a blockchain address that is recognized by the server 12 as the account of the user 210 when the user 210 signs in to the server 12. For example, if the blockchain address of the source of the NFT 101 and the blockchain address of the source of the settings regarding exercise of rights match, the server 12 will set the settings regarding exercise of rights (setting of item delivery destination). The transmission source can be determined to be the owner (transmission source) of the NFT 101. That is, the server 12 can determine that the operator of the operation display 13B is the owner (sender) of the NFT 101 (steps S414, S415).

Note that step S61 may be omitted. For example, if transmitting the NFT 101 is set as a condition for transmitting the settings (step S435), the NFT 101 is transmitted to the predetermined destination along with transmitting the settings. For example, the user 210's selection of the confirm button 501 in FIG. 5 may constitute consent to transmit the NFT 101. In this case, when the confirm button 501 is operated, the settings are transmitted to the server 12 under the control of the server 12, and the NFT 101 is transmitted to a predetermined destination.

Further, for the verification in step S413, the NFT 101 does not need to be transmitted to a predetermined destination. The server 12 can compare the owner of the NFT 101 and the source of the settings regarding exercise of rights, and if they match, it can determine that the exercise of rights is proper. In this case, since the user 210 remains in possession of the NFT 101, it is preferable to limit the operation of the operation display 13B to one time or a predetermined number of times. In this case, unlimited exercise of rights can be prevented. Further, transmitting the NFT 101 to a predetermined destination may be performed not only for the purpose of verification but also simply to make the NFT 101 invalid.

FIG. 7 shows an example of a scenario in which a user operates the NFT 101 and obtains a product. When the user 210 presses the button 13B of the NFT 101 (step S71), the terminal 30 of the user 210 calls the API of the server 12 and transmits data to the server 12 (step S72). Note that the user 210 signs in to the server 12 from the terminal 30 using the user's 210 blockchain address (0x1111).

The data transmitted in step S72 may include, for example, the token identifier (NFT_ID) of the NFT 101 on which the button 13B was pressed and the address (contract address) of the NFT 101. The address of the NFT 101 is the address where the NFT 101 is located in the blockchain 11. The address of the NFT 101 is, for example, the contract address of the smart contract 130 in which the NFT 101 is placed.

The data transmitted in step S72 may include product delivery information. The product shipping information may include the product shipping address. The data transmitted in step S72 may include the email address of the product delivery destination.

The data transmitted in step S72 may include the blockchain address of the user 210 who operated the button 13B of the NFT 101 in step S71.

The server 12 receives the data transmitted in step S72, and stores the received data in the database of the storage device 12B (step S73).

In response to step S72, the server 12 notifies the terminal 30 that the data has been saved (step S74). This notification is displayed on the display of the terminal 30 (step S75).

The user 210 then operates the terminal 30 to call the smart contract 130 and transmit the NFT 101 to the smart contract 130 (step S76). The smart contract 130 is called by the operation in step S76, and the NFT 101 on which the button 13B was operated is transmitted to the smart contract 130 (step S77A). By transmitting the NFT 101 from the blockchain address (0x1111) of the user 210 to the smart contract 130, the user 210 no longer has the NFT 101. Note that the calling of the smart contract 130 and the transmission of the NFT 101 can be executed by the server 12 that the terminal 30 is accessing.

The smart contract 130 receives the NFT 101 transmitted in step S77A. The smart contract 130 verifies whether the received NFT 101 is legitimate. That is, the smart contract 130 verifies whether the received NFT 101 is an NFT with associated rights.

The smart contract 130 records data indicating the NFT 101 with which rights are associated. For example, NFTs placed in smart contract 130 may be the only NFTs with associated rights. Here, the NFT placed in the smart contract 130 means that the blockchain address of the NFT is the contract address of the smart contract 130 and not the contract address of another smart contract.

If the received NFT 101 is an NFT placed in the smart contract 130, the smart contract 130 notifies the computer system 12 to that effect (step S77B). The server 12 executes rights-related processing when the received NFT 101 is an NFT placed in the smart contract 130. However, if the NFT is not placed in the smart contract 130, no rights-related processing is performed. This makes it possible to prevent rights-related processing from being executed when an NFT with no associated rights is fraudulently transmitted.

Furthermore, the smart contract 130 invalidates the received NFT 101.

If the NFT 101 received by the smart contract 130 is an NFT placed in the smart contract 130, the server 12 further performs verification (step S413; see FIGS. 4 and 6). The verification here includes, for example, the following first verification and second verification.

The first verification is whether the blockchain address of the user who sent the NFT 101 and the blockchain address of the user who operated the button 13B are the same. The server 12 can obtain the blockchain address of the user who sent the NFT 101 by referring to the transaction record of the NFT 101 recorded on the blockchain 11. Furthermore, the blockchain address of the user 210 who operated the NFT 101 in step S71 is stored in the database of the storage device 12B in step S73.

The second verification is whether the NFT 101 transmitted in step S77A is the same as the NFT 101 operated in step 71. The server 12 can perform the second verification, for example, by determining whether the token identifier (NFT_ID) of the NFT 101 transmitted in step S77A is the same as the token identifier (NFT_ID) stored in step S73. .

If both the first verification and the second verification are determined to be "the same," the server 12 registers the fact that the NFT 101 has become invalid in the database of the storage device 12B (step S78). The server 12 no longer accepts operations on the button 13B of the NFT 101 that is registered as an invalid NFT.

If either the first verification or the second verification is determined to be "not the same", the server 12 determines that the operation of the button 13B in step S71 is unauthorized, and performs the processing after step S413. do not have.

In step S79A, the server 12 transmits the product delivery information and the email address of the delivery destination saved in step S73 to the product delivery person. The server 12 registers in the database of the storage device 12B that the delivery information etc. have been sent to the delivery person (step S79B). The delivery information and the like are sent, for example, to the delivery person by e-mail. The delivery person who has received the delivery information etc. delivers the product associated with the NFT 101 to the delivery destination indicated by the delivery information. Further, the deliverer notifies the delivery destination that the product has been delivered by e-mail addressed to the delivery destination's email address. This allows the user 210 to understand that the product has been delivered. Further, the user 210 obtains the product delivered from the delivery person.

The present invention is not limited to the above embodiments, and various modifications are possible.

10: Computer system 11: Block chain 11B: Record 12: Server 12A: Processor 12B: Memory 12C: Computer program 12C: Application program 13: Database 13A: NFT data 13B: Operational display 13C: Image 15: Network 30: Terminal 30A: Processor 30B: Memory 30C: Computer program 31: Display 33: NFT display 40: Terminal 101: Non-fungible token 110: User account 120: NFT collection address 120A: NFT information 130: Smart contract 140: Contract address 210 : User 220 : Item provider 500 : Setting display 501 : Completed operation display 600 : Display F : Finger

Claims (14)

A computer implementation for causing a user to exercise a right associated with a non-fungible token, executed by a computer system having display data for exercising rights associated with an identifier of the non-fungible token on a blockchain. A method,
obtaining an identifier of the non-fungible token associated with the user in the blockchain by referencing the blockchain;
providing display data for right exercise operation associated with the identifier to the user 's terminal for display on the screen of the user 's terminal;
A computer-implemented method, comprising: executing processing related to the exercise of the right when the operation of the right exercise operation display is executed. The user is the person recorded as the owner of the non-fungible token in the blockchain.
The computer-implemented method of claim 1. The user is a person who is recorded in the blockchain as a "user" according to the EIP4907 standard that defines rental non-fungible tokens in Ethereum.
The computer-implemented method of claim 1 . further comprising verifying the operator of the right exercise operation display;
The verification includes transmitting the non-fungible token to a predetermined destination after the operation of the right exercise operation display is executed, and transmitting the non-fungible token to the destination. The computer-implemented method according to claim 1, further comprising comparing original data with data indicating an operator of the right exercise operation display. further comprising verifying the operator of the right exercise operation display;
Claim 1: The verifying includes comparing data indicating the user of the non-fungible token recorded on the blockchain with data indicating the operator of the right exercise operation display. The computer implementation method described in . The computer-implemented method according to claim 1, further comprising causing the user to transmit the non-fungible token to a predetermined destination after the operation of the right exercise operation display is executed. 7. The computer according to claim 6 , further comprising verifying whether the non-fungible token on which the right exercise operation display was operated and the non-fungible token transmitted to the destination are the same. How to implement. A limit is set by the computer system on the number of operations on the right exercise operation display.
The computer-implemented method of claim 1. The number of operations is 1.
9. The computer-implemented method of claim 8. A computer system that has display data for exercising rights associated with an identifier of a non-fungible token on a blockchain, and allows a user to exercise rights associated with the non-fungible token, the computer system comprising:
obtaining an identifier of the non-fungible token associated with the user in the blockchain by referencing the blockchain;
providing display data for right exercise operation associated with the identifier to the terminal of the user for display on the screen of the terminal of the user ;
A computer system that executes processing related to the exercise of the right when the operation of the right exercise operation display is executed. further comprising a verification unit that verifies the operator of the right exercise operation display,
The verification unit causes the non-fungible token to be sent to a predetermined destination after the operation of the right exercise operation display is executed, and is configured to determine the source of the non-fungible token sent to the destination. The computer system according to claim 10 , wherein the data is compared with data indicating an operator of the right exercise operation display. further comprising a verification unit that verifies the operator of the right exercise operation display,
11. The verification unit includes comparing data indicating the user of the non-fungible token recorded in the blockchain with data indicating an operator of the right exercise operation display. Computer system as described. After the operation of the right exercise operation display is executed, the non-fungible token is configured to be transmitted from the user to a predetermined destination.
The computer system according to claim 10. It is configured to verify whether the non-fungible token on which the right exercise operation display was operated and the non-fungible token sent to the destination are the same.
The computer system according to claim 13.

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