Sorry, I should've left that out. Edited.

Although interestingly in the EU there is now a small use-it-or-lose-it element with sound recordings, where the copyright on sound recordings expires fifty years after the original recording, or seventy years after the first publication (or at least public playback) by the rightful owner. Cue a number of labels actually officially releasing a number of previously unpublished recordings in order to prevent the corresponding bootlegs of those recordings from falling into the public domain.