To provide a program and the like that can reduce contract cost such as a use permission and the like to contents, and easily show to third parties that the permission is obtained.SOLUTION: An information processing device to be connected to one or more terminal devices over a communication network is caused to embody: a reception function for accepting a prescribed application from the terminal device; a control function for, if the prescribed application is permitted, generating data for a transaction defined with permission descriptions, and recording the same in a decentralized database network; a receiving function for receiving access information to the transaction from the decentralized database network; a code generation function for generating a code in which data including the access information is encoded; and a transmission function for transmitting the code to the terminal device.SELECTED DRAWING: Figure 3