Abstract: With music data made up of four instrument/vocal parts of, e.g., a piano, base, drums, and vocals, project data handled by a management center is configured of tracks with each part existing independently. Tracks 1 through 4 each have independent copyright information, which is to say that even in the event that the tracks 1 through 4 are each created by different creators, copyright information is recorded to each of the tracks 1 through 4, and even in the event that a track for a new part is added to the project data for example, thereby generating different project data, the copyright information on each track is not deleted. Thus, music data made up of multiple tracks having copyright information on each track can be distributed.