[steerablesafe]

IANAL but I don't think that works can become copyrighted. It can be distributed with a license for free use, but then that license can't be revoked after the fact.

The license could be non-transferable and the work can be distributed with a more restrictive license in the future by the copyright holders, or not distributed at all. None of these should affect those that use the work legitimately with the permissive license given to them in the past.

edit: Maybe if a license is revocable or not must be spelled out in the license itself. Many open licenses seem to be explicitly irrevocable.

edit2: More on this topic https://opensource.stackexchange.com/questions/4012/are-lice...

[comboy]

I think the question was what if the music is stolen.

E.g. imagine clone of a GPL github repo but with MIT slapped on it.