Blockchain system, registration device, contribution calculation device, contribution calculation method, and contribution calculation program

摘要

PROBLEM TO BE SOLVED: To calculate the degree of contribution of content according to the purchase status of the content. A blockchain system including a registration device (1) and a contribution calculation device (2), wherein the registration device (1) acquires a content purchase information, and a purchaser based on the content purchase information. The contribution calculation device 2 is provided with a transaction issuing unit 13 that issues a transaction including an ID and a content ID. A history acquisition unit 24 that acquires history information about purchase of related different types of content, and a contribution degree that uses the history information to calculate a contribution degree of the content according to a purchase order of the content related to the content ID. And a calculation unit 25. [Selection diagram] Figure 1