late reply, but here goes: this is probably an 'orphan work,' i.e., a work that's still legally owned (copyrighted) by someone, but whose owner can't be located. legally, you're just required to make a 'reasonable effort' to locate the owner and ask for permission to use. if you do that and come up empty, you can go ahead and use it…

so did that Bandcamp compilation come out yet?

this is a great read 10k, pretty comprehensive.
also, i empathize with you bringing up the chiptheft issue. @DaPantz: i think it's a very interesting idea to locate the cohesion of the chiptune community partly in its resistance to chiptheft, and in its attempts to overcome it.

also, here's a link to a not-so-brief history of chiptunes by two US scholars. it's written for an academic audience, so no lazy journalism here. i'm working on something similar for a different journal myself.
http://journal.transformativeworks.org/ … view/96/94