A recording apparatus for recording a duplicate of a product onto a recording
medium,
the product being a copyrighted digital product having a copy attribute embedded
as a watermark thereon and the recording apparatus including (a) an acquiring unit
for acquiring the copy attribute embedded on the product, (b) a changing unit for
changing the acquired copy attribute into a copy attribute showing no more copy
when the acquired copy attribute shows one generation copy, (c) a reading unit
for reading from the recording medium at least a part of medium ID information
recorded on the recording medium in an unalterable state, and (d) a recording unit
for recording onto the recording medium the duplicate having both the copy attribute
showing no more copy and the read medium ID information embedded as a watermark thereon.