Thanks Casey. I think I get it now.Casey H wrote:NON-LAWYER DISCLAIMER (as always)... Consult a qualified music attorney.
There are 2 different copyrights/ownerships on a recorded piece of music:
(A) The song itself (music and lyrics)
(B) The recording
I've just reviewed a WFH acknowledgment with a Demo Studio - probably the standard version - and it specifically states that the songwriter owns the Master, and can do whatever they wish with it, with the proviso that they can't use the studio's artists' likenesses or names to promote it. They also confirm that they will make no copyright claims on the music and lyrics, which is a prudent thing to have in writing as well.
A songwriter should be able to prove they own the Master because otherwise all they're entitled to for certain is mechanical royalties as writer and presumably publisher. You wouldn't have to be sued by the Studio to run into problems, you might be subject to hold-backs of royalties for the recording if you couldn't prove that you owned the Master, for example.