Hello, Five years ago I made a CD set with another artist. We had no formal agreement and we did not copyright anything. We lost touch. Now a publisher wants to bring out the CD set in downloadable format. I have tried to reach the artist in question without success. What are my options? My priority is to include her in the royalties agreement, but if she can't be reached I don't want this to keep my publisher from bringing this album out. Should I copyright the work and have the publisher include a clause to the effect that if she ever turns up a portion of the income is hers? Or what? Thanks!