Hey Everett,

When the song is recorded, it should have a ISRC

Link .... https://en.wikipedia.org/wiki/International_Standard_Recording_Code

For the artist to receive broadcast royalties ( in all countries except for the US ) the ISRC will be quoted and the writer and publisher will be paid through their PRO.

As for a few CD's ? I wouldn't worry about it. It's good promotion and good will for your songs, and for the performer. And besides, the paperwork would generate a negative income stream if you took the hassle component into perspective.

cheers, Geoff