Data processing system and information providing method

摘要

A data processing system comprising: a data recording medium having recorded thereon digital data including at least work data and having recorded thereon in advance identification information which enables identification proper to the recording medium; information providing means for providing a duplicate recording medium obtained by duplicating at least the digital data recorded on the data recording medium and then adding information provider identification information to the duplicated digital data; reproducing means for reproducing the digital data having the information provider identification information added thereto, recorded on the duplicate recording medium; and work data managing means to which the information provider identification information generated by the information providing means and the information provider identification information recorded on the duplicate recording medium and reproduced by the reproducing means are transmitted.