Unfortunately, copyright law hasn't caught up to technology. The law doesn't adequately cover computer-generated works of art. We don't believe the songs to by copyrighted, but if you are concerned, we suggest you check with your own lawyer.
The Fake Music Generator doesn't require attribution or a link to our site (although it'd be appreciated!).
The makers of cgMusic, the software used to generate the music, asks that you give them credit and link to their site if you use the music we've provided.