How does song ownership work?

First, Kompoz has no ownership interest in any collaboration (song).  Collaborators agree on what percent of the song each owns.

When the creator of the collaboration initiates the sales process, an electronic workflow starts. The creator proposes what song ownership splits each collaborator will receive for their contribution. If each collaborator agrees, the song will be listed for sale on SoundBlend and Kompoz will manage the splits (for SoundBlend revenue).  If the collaborators don't agree, the collaboration owner can either a) propose different splits, or b) remove one or more collaborator(s), or c) not publish the song.