JP2004185430A - Device, method, program, and program storage medium for providing copyrighted work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device, a method, a program, and a program storage medium for providing a copyrighted work capable of collectively managing copyrighted works purchased by a user via various media for preventing double purchase of the works. <P>SOLUTION: This copyrighted article providing system 100 is a computer system having a copyrighted work providing device, a user terminal 3, and a computer network 2 such as the Internet connecting the copyrighted work providing device 1 to the user terminal 3. In the copyrighted work providing system 100, the copyrighted works bought by the user from any media are collectively managed by the copyrighted work providing device 1, so that double purchase is prevented when the user purchases a copyrighted work from the copyrighted work providing device 1 via the computer network 2. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a work providing apparatus, a work providing method, a work providing program, and a work providing program recording medium for providing a work through a computer network.
[0002]
[Prior art]
At present, various shopping sites are opened on the Internet, and it is said that there are no products that cannot be purchased on the Internet. Works represented by music are no exception, and there are a wide variety of sites, including sales sites that purchase after trial listening, and sites and software (eg, WinMX) for exchanging works owned by users. In addition, some users enjoy the copyrighted works purchased on the Internet on a personal computer, and others enjoy purchasing music CDs, importing them to a personal computer, and converting them into music files represented by MP3 (MPEG Audio Layer-3). Some users enjoy both.
[0003]
If a music CD is played on a personal computer connected to the Internet, the playback software acquires attribute information such as an album name, an artist name, a work name, and a genre by a service represented by, for example, CDDB (Compact Disc Data Base). Then, a music file to which such information is added can be created.
[0004]
As the media is thus diversified, it is now possible to obtain copyrighted works and their attribute information from any media.
[0005]
The related prior art document information of this application includes the following.
[0006]
[Non-patent document 1]
[Retrieved November 25, 2002], Internet <URL: http: // www. winmx. com / >>
[0007]
[Non-patent document 2]
[Retrieved November 25, 2002], Internet <URL: http: // www. gracenote. com / >>
[0008]
[Problems to be solved by the invention]
In such a situation, it is possible to obtain a work and its attribute information from all media, but there is a problem that it is difficult to centrally manage the work and its attribute information.
[0009]
For example, a conventional work providing apparatus that provides a work such as music using the Internet as a medium has the following problems.
[0010]
1. A user cannot manage a copyrighted work (for example, an MP3 format music file directly created from a music CD) other than the copyrighted work purchased from the copyrighted work providing apparatus.
[0011]
2. Due to the above problems, there is a possibility that when a user collectively purchases a collection of copyrighted works, such as a music album, the already owned copyrighted work is repeatedly purchased.
[0012]
The present invention has been made to solve the above problems, and provides a copyright that can prevent duplicate purchases of copyrighted works by centrally managing the copyrighted works purchased by users through various media. It is an object of the present invention to provide an apparatus, a copyright providing method, a work providing program, and a work providing program recording medium.
[0013]
[Means for Solving the Problems]
To achieve the above object, the present invention according to claim 1 is capable of communicating with a user terminal via a computer network and preventing duplicate purchases based on purchase history information of a work purchased by a user. A work providing apparatus for providing a work purchased by the user to the user terminal, wherein the work detects a work stored in the user terminal and attribute information of the work. Product detection means, and purchase history update means for extracting difference information between the purchase history information and the attribute information of the work detected by the work detection means, and reflecting the difference information in the purchase history information. It is the gist to have.
[0014]
Here, the computer network means a general communication network using a telecommunication technology, for example, an Internet system based on TCP (Transmission Control Protocol) / IP (Internet Protocol), a WAN (Wide Area Network), and a LAN. (Local Area Network), optical fiber communication, cable communication, satellite communication, and the like. In addition, a copyrighted work means a digitally provided work that can be provided through a computer network, and refers to all digitalized works irrespective of attributes such as video, images, audio, characters, and numerical information. . Further, the copyrighted work providing device is a generic name for a device capable of realizing the functions of the present invention by a program, and includes a supercomputer, a general-purpose computer, an office computer, a workstation, a personal computer, a microcomputer, a PDA (Personal). Digital Assistance). The configuration may be any configuration such as a single device or a system in which a plurality of distributed devices are connected to a network.
[0015]
According to a second aspect of the present invention, in the first aspect of the present invention, when a work included in the purchase history information and a work which the user intends to purchase has an overlap, the user has an overlap. The gist of the present invention is to have a duplicate information notifying means for notifying that there is a certain information.
[0016]
According to a third aspect of the present invention, in the first or second aspect, the work that the user intends to purchase is a collection of works composed of a plurality of works. .
[0017]
According to a fourth aspect of the present invention, there is provided the method according to any one of the first to third aspects, wherein the usage conditions of the purchased work or the usage conditions of the purchased work and the usage conditions in the purchase history information are different. The gist of the present invention is to include a copyright fee notifying unit that calculates a copyright fee of a work purchased by the user based on the difference and notifies the user terminal of the copyright fee.
[0018]
According to a fifth aspect of the present invention, a computer communicable with a user terminal and a computer network via a computer network prevents the user from making duplicate purchases based on purchase history information of a work purchased by the user. A work providing method for providing a work to be purchased to the user terminal, wherein the work stored in the user terminal and attribute information of the work are detected; A purchase history update step of extracting difference information between the purchase history information and the attribute information of the copyrighted work detected by the copyrighted work detection means, and reflecting the difference information in the purchase history information. .
[0019]
Here, the computer is a general term for a device capable of realizing the functions of the present invention by a program, and includes a supercomputer, a general-purpose computer, an office computer, a workstation, a personal computer, a microcomputer, a PDA (Personal Digital Assistance). ). The configuration may be any configuration such as a single device or a system in which a plurality of distributed devices are connected to a network.
[0020]
According to a sixth aspect of the present invention, in the invention of the fifth aspect, when there is an overlap between the work included in the purchase history information and the work that the user intends to purchase, the user is provided with an overlap. The gist of the present invention is to have a duplicate information notification step of notifying that there is a certain information.
[0021]
According to a seventh aspect of the present invention, in the invention of the fifth or sixth aspect, the work that the user intends to purchase is a collection of works composed of a plurality of works. .
[0022]
The present invention described in claim 8 is the invention according to any one of claims 5 to 8, wherein the use condition of the purchased work or the use condition of the purchased work and the use condition in the purchase history information are different. The gist of the present invention is to include a copyright fee notification step of calculating a copyright fee of a work purchased by the user based on the difference and notifying the user terminal of the copyright fee.
[0023]
According to a ninth aspect of the present invention, a computer communicable with a user terminal via a computer network prevents the user from making duplicate purchases based on purchase history information of a work purchased by the user. A work providing program for providing a work to be purchased to the user terminal, wherein the computer detects a work stored in the user terminal and attribute information of the work. And a step of extracting difference information between the purchase history information and the attribute information of the copyrighted work detected by the copyrighted work detection means, and performing a purchase history update step of reflecting the difference information in the purchase history information. That is the gist.
[0024]
Here, the program is configured such that an OS running on a computer, middleware such as database management software, network software, and the like, based on instructions of the program, execute a part of each process for implementing the present embodiment. Are included.
[0025]
According to a tenth aspect of the present invention, in the invention according to the ninth aspect, when there is an overlap between the work included in the purchase history information and the work that the user intends to purchase, the computer The gist of the present invention is to cause a user to execute a duplication information notification step of notifying that there is duplication.
[0026]
According to an eleventh aspect of the present invention, in the invention of the ninth or tenth aspect, the work which the user intends to purchase is a collection of works composed of a plurality of works. .
[0027]
According to a twelfth aspect of the present invention, in the invention according to any one of the ninth to eleventh aspects, the computer uses, in the purchase history information, the use condition of the purchased work or the use condition of the purchased work. A copyright providing program for calculating a copyright fee of a copyrighted work purchased by the user based on a difference from a use condition, and executing a copyright fee notifying step for notifying the user terminal. .
[0028]
According to a thirteenth aspect of the present invention, a gist of the present invention is that the copyrighted work providing program according to any one of the ninth to twelfth aspects is recorded on a computer-readable recording medium.
[0029]
Here, the recording medium refers to a computer-readable recording medium capable of recording a program such as a semiconductor memory, a magnetic disk, an optical disk, a magneto-optical disk, and a magnetic tape.
[0030]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0031]
FIG. 1 is a schematic configuration diagram of a copyrighted work providing system 100 according to an embodiment of the present invention. The copyrighted material providing system 100 includes a copyrighted material providing device 1, a user terminal 3, and a computer network 2 such as an Internet network connecting the copyrighted material providing device 1 and the user terminal 3. When the user purchases a work from the work providing apparatus 1 via the computer network 2, the work provided by the work providing apparatus 1 is integrally managed by the work providing apparatus 1. It is a computer system that can be used.
[0032]
The work providing apparatus 1 includes a work providing database (hereinafter referred to as a work providing DB) 11, a CPU, and the like, and controls the work providing DB 11, transfers data, performs various calculations, and temporarily stores data. And a control unit 12 for performing such operations.
[0033]
Here, the work providing DB 11 has a work 111 such as a music file, a work management table 112, a work list management table 113, a user management table 114, and a user owned work management table 115 in detail. It has a configuration.
[0034]
As shown in FIGS. 2A and 2B, the work management table 112 includes items such as work ID, work name, artist name, availability information, provider ID, and plural use conditions. It is a master table for managing various attribute information related to the copyrighted work. In the work management table 112, the work ID is identification information for uniquely determining a record in the work management table 112.
[0035]
As shown in FIG. 3, the work list management table 113 includes information d1 on the work list as a collection of works, such as a list ID, a work list name, a genre, and use conditions, and the work list. And information d2 relating to music. As a result, the user can receive not only the music file as a single unit but also the music file as a music album. In the copyrighted work list management table 113, the list ID is identification information for uniquely determining a record in the copyrighted work list management table 113.
[0036]
As shown in FIG. 4, the user management table 114 includes items related to user attributes such as user ID, name, gender, date of birth, and mail address. It is identification information that uniquely determines a record.
[0037]
The user-owned copyrighted work management table 115 is a table that stores information regarding the purchase history of music files purchased by the user, and includes items such as a user ID, a copyrighted work ID, an acquisition date, a use condition, and a file location. And manages the copyrighted work owned by each user and the usage conditions thereof, as well as the file location of the owned music file on the user terminal 3. In the user-owned work management table 115, the user ID and the work ID are identification information for uniquely determining a record in the user-owned work management table 115.
[0038]
The copyrighted work providing device 1 has a Web server and a mail server (not shown) in addition to the functions as the application server and the database server as described above. Information can be exchanged using e-mail. Here, regarding the electronic mail, the electronic mail is transmitted using the mail address information managed in the user management table 114. The configuration of the copyrighted work providing device 1 may be a single device as shown in FIG. 1 or a system in which a plurality of devices are distributed and connected to a network.
[0039]
The user terminal 3 is a personal computer or the like connected to the computer network 2, and browser software, e-mail software, music file creation software, music file playback software, and the like are installed in the user terminal 3. . With the browser function and the e-mail function, the user terminal 3 can exchange information with the copyright providing apparatus 1 and, on the user terminal 3, a copyrighted work such as a music CD. For example, a music file in the MP3 format or the like can be created from the recording medium 4 and the music file can be reproduced. Then, various music files created by the music file creation software are managed as a work file 31, and attribute information of the music file is managed as a work attribute information file 32.
[0040]
Hereinafter, the operation of the copyrighted work providing system 100 will be described with reference to FIGS. Here, FIG. 6 is a sequence diagram illustrating a process of reflecting the attribute information on the copyrighted work purchased by the user in the copyrighted work providing device 1, and FIG. FIG. 9 is a sequence diagram illustrating a process of purchasing a. FIG. 8 is a view for explaining a screen for inputting attribute information on a work purchased by the user, and FIG. 9 is a view for explaining a transition of data in the user-owned work management table 115.
[0041]
(1) Attribute information reflection processing
First, the user creates a music file from the copyrighted recording medium 4 purchased by the user at the user terminal 3 (step S1).
[0042]
Next, the user inputs, for example, attribute information such as a title name, an artist name, and a genre of the created music file from a music file attribute information registration screen dis1 as shown in FIG. 8 (step S2). . As a result, the music file 31 purchased by the user is registered as a copyrighted work file 31 in the user terminal 3, and the attribute information of the music file is registered in the copyrighted work attribute information file 32. In the case where the attribute information is changed or deleted, the change / deletion process is similarly performed using the attribute information registration screen dis1.
[0043]
Next, the user connects the user terminal 3 to the copyrighted work providing device 1 via the computer network 2, and instructs the attribute information reflection process (step S3). Upon receiving the reflection instruction from the user terminal 3, the work providing apparatus 1 searches for an arbitrary folder on the user terminal 3, and as a result of the search, finds the found work file 31 and work attribute information file 32. By comparing and referring to the user data in the user-owned copyrighted work management table 115, a list of newly added or changed / deleted music files and their attribute information is obtained (steps S4 to S7). ).
[0044]
This is because the presence of a new music file on the user terminal 3 and the deletion of the music file from the user terminal 3 are based on the file location information of the user-owned work management table 115 and the user terminal 3. Is determined by comparing the actual existence of the files. The change of the music file on the user terminal 3 is determined by comparing the acquisition date of the user-owned work management table 115 with the file creation date on the user terminal 3. From the viewpoint of shortening the search time, it is desirable to store music files and attribute information in a predetermined search folder, and to search the user terminal 3 only for the search folder.
[0045]
If a new music file exists on the user terminal 3, the copyrighted work providing apparatus 1 uses the attribute information (eg, album name, copyrighted work name, artist name, etc.) of the music file as a key to create a copyrighted work. The management table 112 is searched to confirm whether the information of the music file is managed in the copyrighted work management table 112 (steps S8 to S9). If the information of the music file owned by the user is not managed in the work management table 112, the work providing apparatus 1 allocates a new work ID to the music file, New information is registered in the memory 112 (see FIG. 2B) (steps S10 to S11). Here, the newly registered music file is considered to be unique to the individual and cannot be sold (the provision or non-provision is set in a negative state). When the copyright management is performed, the work management table 112 is updated by adding information such as the provider ID, the availability (provided that the availability is available), and the usage conditions.
[0046]
Next, the copyrighted work providing apparatus 1 reflects the information of the added, changed, or deleted music file whose difference has been extracted in the user-owned copyrighted work management table 115 (step S12).
[0047]
The reflection in the user-owned work management table 115 is, for example, specifically, as shown in FIG. 9B, the work ID, the acquisition date, the acquisition method (user registration), and the use condition information. , The user-owned work management data d15 in which items such as file location are set are registered in the work management table 115.
[0048]
Thereby, even if the user does not purchase a music file from the copyrighted work providing apparatus 1, the user can create the purchased music file in the user terminal 3 and register the attribute information of the music file. For example, the copyrighted work providing device 1 can search the user terminal 3 and reflect the attribute information of the music file in the copyrighted work management table 115 owned by the user, so that the user has purchased through various media. Music files can be centrally managed.
[0049]
(2) Processing for purchasing copyrighted works
First, the user selects a work list to be purchased from a work list (for example, a selection of songs by an artist) describing a collection of works provided by the work providing apparatus 1, and selects all the contents included in the work list. And specify its terms of use (eg, you can use the work unlimitedly, you can use the work up to 50 times, you can use the work for a limited period of three months from the date of purchase, etc.) A purchase procedure is performed (step S21).
[0050]
This is to display the copyrighted work list management data stored in the copyrighted work list management table 113 and allow the user to select a desired copyrighted work list and use conditions. In the above-described purchase, an example in which a plurality of works are purchased from the work list has been described. However, it is of course possible to purchase a single work.
[0051]
Next, the work providing device 1 compares and compares the work that the user wants to purchase or the work included in the work list with the work in the user-owned work management table 115. It is checked whether there is any overlap with the copyrighted work (steps S22 and S23).
[0052]
If there is a duplicate work, the work providing apparatus 1 checks the conditions of use of the work and determines whether the conditions of the owned work are the same as those specified at the time of purchase. (For example, the user specifies the purchase with no restrictions, but the expiration date of the copyrighted work is determined, etc.) (steps S24 and S25).
[0053]
In the case where the copyrighted work including the use condition is duplicated (in the case where the work is the same and the use condition is the same), the work providing apparatus 1 presents the fact to the user and information of the applicable work, It is confirmed whether or not to purchase the copyrighted work (steps S27 and S28).
[0054]
If the copyrighted work is duplicated but the terms of use are not the same, the copyrighted work providing device 1 presents the user with such information and information on the corresponding copyrighted work, and determines whether or not to purchase the copyrighted work. (Steps S26 and S28). This means, for example, a confirmation that the user has changed the usage condition “usable to use the work for three months only” to “unlimited use of the work”.
[0055]
Next, when the user who has been notified of the duplication confirms the purchase condition and gives an instruction of the purchase condition to the work provision device 1, the work provision device 1 Is calculated and notified to the user (steps S29 to S31). In the case where the user purchases a copyrighted work without changing the usage conditions, the total amount of money that meets the usage conditions in the copyrighted work management table 112 is calculated and notified to the user. When the usage conditions are changed, the amount of the difference between the conditions is calculated, and the user is notified. For example, specifically, in the case of changing from “the work can be used for three months only” shown in FIG. 2A to “the work can be used without limitation”, the usage condition price of “unlimited” is 300. Since the usage condition consideration for the yen and “limited to three months” is 50 yen, 300-50 = 250 yen is the newly charged amount.
[0056]
If there is no duplication between the work that the user intends to purchase or the work included in the work list and the work already owned, the copyright fee of the work to be purchased is Is calculated with reference to the usage conditions of the copyrighted work management table 112 or the copyrighted work list table 113, and the user is notified (steps S30 to S31).
[0057]
Next, the user confirms the notified copyright fee and finally confirms the purchase (step S32). Thereby, the work providing apparatus 1 transmits the work selected for purchase to the user terminal 3, and the user receives the purchased work (steps S33, S34).
[0058]
Here, when the user purchases all the works included in the work list, the work providing apparatus 1 creates a folder with the work list name under an arbitrary folder designated by the user, Send all copyrighted work to that folder. When the user purchases only a part of the work in the work list (when he / she does not purchase the owned work), the work providing apparatus 1 uses an arbitrary folder designated by the user. Create a folder with the name of the work list under, and send all purchased works to that folder, or copy the unpurchased work from the folder where it is located to the folder created, or Create a link file describing the location of things.
[0059]
Lastly, the copyrighted work providing device 1 reflects the information of the music file in the user-owned copyrighted work management table 115 for the newly purchased work or the work purchased by changing the usage conditions (step S <b> 1). S35). Here, the reflection in the user-owned work management table 115 is, for example, specifically, as shown in FIG. 9C, the work ID, the acquisition date, the acquisition method (online), the use condition information This means that the user-owned work management data d16 and d17 in which items such as file location are set are registered in the work management table 115.
[0060]
Accordingly, when the user purchases a music file from the copyrighted work providing device 1, the purchase history of the music file that the user has purchased so far through various media is centrally managed. Duplicate purchase can be prevented, and only necessary music files can be purchased efficiently without excess or shortage. Further, the copyrighted work providing device 1 accurately calculates and presents the copyright fee to the user according to the copyrighted work to be purchased and the usage conditions, so that the user can pay the exact copyright fee.
[0061]
This is particularly effective when the user purchases a collection of works composed of a plurality of works. It is possible for a user to purchase only a genuinely necessary literary work at a copyright fee according to the conditions of use.
[0062]
Although the embodiments of the present invention have been described above, various modifications and changes can be made to the embodiments of the present invention without departing from the spirit of the present invention. For example, in the copyrighted work providing system 100 according to the above-described embodiment, the case where a music file is provided has been described as an example, but the copyrighted work is not limited to a music file, and may be applied to other digital contents. Of course you can.
[0063]
Further, in the above embodiment, when searching for a work purchased by a user, the user terminal is searched. However, the number of user terminals may be one, User terminals may be configured to be networked, and the plurality of user terminals may be searched.
[0064]
Note that the operation of the copyrighted work providing apparatus 1 of the above embodiment is realized by executing a program stored in the copyrighted work providing apparatus 1. This program can be recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD-ROM, or can be distributed via a communication network.
[0065]
【The invention's effect】
As described above, according to the copyrighted work providing apparatus of the present invention, the copyrighted work stored in the user terminal can be detected and the user's possession status of the copyrighted work can be grasped. In this way, when a user purchases a work provided on a computer network, duplicate purchase of the work can be prevented.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a copyrighted work providing system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an example of a work management table of the work management device according to the embodiment of the present invention.
FIG. 3 is a diagram illustrating an example of a work list management table of the work management apparatus according to the embodiment of the present invention.
FIG. 4 is a diagram illustrating an example of a user management table of the copyrighted work management device according to the embodiment of the present invention.
FIG. 5 is a diagram illustrating an example of a user-owned work management table of the work management apparatus according to the embodiment of the present invention.
FIG. 6 is a sequence diagram illustrating a process in which a user reflects attribute information on a work purchased by the user in the work providing apparatus in the work management system according to the embodiment of the present invention.
FIG. 7 is a sequence diagram illustrating a process in which a user purchases a work from a work providing device in the work management system according to the embodiment of the present invention;
FIG. 8 is a diagram illustrating a screen for inputting attribute information relating to a work purchased by the user in the work management system according to the embodiment of the present invention.
FIG. 9 is a diagram illustrating a transition of data in a user-owned work management table 115 of the work management apparatus according to the embodiment of the present invention.
[Explanation of symbols]
1 Work providing device
2 Computer network
3 user terminals
4 Copyrighted recording media
11 Copyrighted work DB
12 control means
31 Copyright files
32 Copyright attribute information file
100 Copyrighted material providing system
111 copyrighted work
112 Copyright Management Table
113 Copyright List Management Table
114 User Management Table
115 User-owned work management table

Claims (13)

The user terminal and the user terminal can communicate with each other via a computer network, and can prevent the duplicate purchase based on the purchase history information of the work purchased by the user, and copy the work purchased by the user to the user terminal. A copyrighted work providing device,
A work detection means for detecting a work stored in the user terminal and attribute information of the work;
A purchase history update unit that extracts difference information between the purchase history information and the attribute information of the copyrighted work detected by the copyrighted work detection unit, and reflects the difference information in the purchase history information;
A copyrighted work providing device comprising: When there is an overlap between the literary work included in the purchase history information and the literary work that the user intends to purchase, a duplication information notifying unit for notifying the user of the duplication is provided. The copyrighted work providing device according to claim 1. 3. The work providing apparatus according to claim 1, wherein the work to be purchased by the user is a work collection composed of a plurality of works. Calculating the copyright fee of the work purchased by the user based on the usage conditions of the work to be purchased or the difference between the usage conditions of the work to be purchased and the usage conditions in the purchase history information, The copyrighted work providing device according to claim 1, further comprising a copyright fee notifying unit that notifies the terminal of the copyrighted fee. A computer capable of communicating with the user terminal and the computer via a computer network prevents the user from purchasing the work purchased by the user while preventing duplicate purchases based on the purchase history information of the work purchased by the user. A method of providing a copyrighted work to be provided to a terminal,
A work detection step of detecting a work stored in the user terminal and attribute information of the work;
A purchase history update step of extracting difference information between the purchase history information and the attribute information of the copyrighted work detected by the copyrighted work detection means, and reflecting the difference information in the purchase history information;
A method for providing a copyrighted work, comprising: When there is an overlap between the copyrighted work included in the purchase history information and the copyrighted work to be purchased by the user, a duplication information notification step of notifying the user of the duplication is provided. The method for providing a copyrighted work according to claim 5. 7. The method according to claim 5, wherein the work to be purchased by the user is a collection of works composed of a plurality of works. Calculating the copyright fee of the work purchased by the user based on the usage conditions of the work to be purchased or the difference between the usage conditions of the work to be purchased and the usage conditions in the purchase history information, The method according to any one of claims 5 to 7, further comprising a step of notifying a terminal of a copyright fee. A computer capable of communicating with the user terminal and the computer via a computer network prevents the user from purchasing the work purchased by the user while preventing duplicate purchases based on the purchase history information of the work purchased by the user. A copyrighted program provided to the terminal,
To the computer,
A work detection step of detecting a work stored in the user terminal and attribute information of the work;
A purchase history update step of extracting difference information between the purchase history information and the attribute information of the copyrighted work detected by the copyrighted work detection means, and reflecting the difference information in the purchase history information;
A work providing program. If the copyrighted work included in the purchase history information and the copyrighted work to be purchased by the user are duplicated, the computer is caused to execute a duplicated information notification step of notifying the user of the duplication. 10. The program for providing a copyrighted work according to claim 9, wherein: 11. The program according to claim 9, wherein the work to be purchased by the user is a collection of works composed of a plurality of works. The computer calculates a copyright fee of the work purchased by the user based on a use condition of the work to be purchased or a difference between a use condition of the work to be purchased and a use condition in the purchase history information. 12. The program according to claim 9, further comprising a step of notifying a copyright notice to the user terminal. 13. A program providing medium, wherein the program providing program according to any one of claims 9 to 12 is recorded on a computer-readable recording medium.

Images