abacab
Found the article below regarding derivatives (copyrighted arrangements) of public domain music that MAY be copyrighted:
Avoiding problems with public domain music
http://www.publicdomainsh...blic-domain-music.html
In a similar vein, back in '87 I was contracted to record 5 of my own originals songs for a national radio program. I was paid for doing it, and they played each song 5 times and 5 times only. If they were to play them after that, I'd have to receive more royalties. So they've sat in the vault (or erased?) for over 30 years now, unplayed.
However...
From the start, I've never been allowed to shop those recordings around to other stations, nor use them on any albums I make, nor post them online - even if it's non-profit.
I do own the songs, and have complete copyright on them, but the radio network owns
those versions that were recorded for their program. I can re-record them, even if I do them exactly as before, but those particular versions are theirs, and I can't touch them.
Copyright is a strange land to navigate.