Patent ID: 7783577

Claim:
An information service method, comprising: recording identification information unique to a non-recordable data recording medium to the data recording medium; correlatively storing the identification information and management information corresponding to the data recording medium at a management server; reading, at a client device, the identification information from the data recording medium; transmitting, from the client device, the identification information read from the data recording medium to a communication network; receiving, at the management server, the transmitted identification information and reading the management information correlated with the identification information; outputting the read management information from the management server to the client device; transmitting, from the client device, the identification information and information that represents a use mode of the data recording medium to the management server; updating, at the server, the management information each time the identification information and information that represents a use mode of the data recording medium is received from the client device; and reproducing, at the client device, the content data on the data recording medium in accordance with the management information received from the management server.