Blockchain system, registration device, degree of contribution computation device, degree of contribution computation method, and degree of contribution computation program

#The present invention relates to a technology for calculating a contribution degree of content.

#In recent years, an intellectual property (IP) such as copyrights are generally used across variable forms of content. For example, a certain IP may be expanded into games and TV animation at the same time, and then expanded into cartoon content. Further, another IP can be expanded into music, and then expanded into content of a novel or a cartoon.

#As a mechanism for distributing a profit obtained from sale of content to a content right holder and a content licensee, a technique for distributing a profit according to a predetermined distribution rate via a specific server has been proposed (refer to Patent Literature 1).

#FIG. 1 is a diagram illustrating an overall configuration of a blockchain system according to an embodiment of the present invention.

#FIG. 2 is a diagram illustrating a configuration of a distributed ledger.

#FIG. 3 is a diagram illustrating an example of a purchase information token.

#Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

#In the present embodiment, a blockchain is used to manage a purchase history of content across services and calculate a contribution degree of a content according to a purchase situation of the content.

#The blockchain (refer to Non Patent Literature 1) is a mechanism capable of ensuring reliability without a need for centralized management. In the blockchain, transaction information (transaction) between participants is collected in units of “blocks”, and each block is linked one after another and managed in chronological order. A ledger of a series of pieces of transaction information managed by using the blockchain is referred to as a “distributed ledger”, and each terminal included in a network stores the same distributed ledger.