Quoting thewade <pdman(a)aproximation.org>rg>:
Before you publish a track, either on CD or on the
net, how do you
insure someone else wont put their name on your track and take credit
for it?
There is a quite low-tech much used technique for this. Make a demo of the
song, or the whole song on a CD/cassette/anything. Put it in an envelope
with a written, signed and timestamped letter explaining the contents (and
maybe a usage license like creative commons). Seal the envelope so that
opening it would break the seal. Then mail the envelope to yourself,
preferably via certified mail.
Last, and the most important step, is to not open the letter after you
receive it.
In case of someone stealing your song, open the letter in court, or with a
clerk, notary etc. present who then can prove that the package wasn't opened
earlier and what the package contained and when the package was sealed.
This method is known in the popular music industry for having proof of when
you have made the song.
(just remember to get all the details right, I might have left something
important out)
Sampo