meself, it isn't worth the time. If the copyright holder isn't easy to locate, and you intend to print fewer than a thousand CDs, just record the tune and keep the cash available to pay people who can prove they own the song/reel/jig whatever. I intend to record a song written back near 1925, and even that came from a song written in the late 1800s. There are at least 40 living copyright holders for that song. I think they are full of it, so they can sue me or prove they wrote the song. If anyone does, I will split the $100 among the lot of them. I hope they'll be happy with their $2.50 each.

If the new CD is half as good as your last one--or the last I have heard--it will be wonderful. You playing harp on it?