SERVER AND TRANSMITTER/RECEIVER

PROBLEM TO BE SOLVED: To grasp the number of times, time, and place, etc., by which a musical composition has been reproduced. SOLUTION: A recording part 22 of a music server system 10 is an apparatus for recording musical composition information stored in a HDD 14 on an external recording medium 24. Since there is possibility of literary piracy, restrictions on external recording are arranged for the recording to the recording medium 24. Moreover, an identification code, etc., is embedded in the recording medium 24, authentication work is performed via an authentication part 23 of the music server system 10, and the justification as a recording medium can be discriminated. When the justification of the recording medium is confirmed by the authentication part 23, the recording part 22 performs delivery of the musical composition and the decoding key from the music server system 10 to the recording medium 24. In the database used by management of a main controller 15, the data concerning contents number, main information, character information, reproduction information, and other information are described. Furthermore, in the database of reproduction information, data concerning reproduction date and time and the reproducing apparatus are described.