Does a co-owner of a copyright have to account to other co-owners for any profits they earn from licensing or use of the copyright?

A co-owner of a copyright must account to other co-owners for any profits he earns from licensing or use of the copyright. Oddo v. Ries, 743 F.2d 630, 633 (9th Cir.1984). Copyright law considers both exclusive licenses and assignments to be transfer[s] of copyright ownership. 17 U.S.C. 101. The statute enumerates various rights that copyright owners hold, including the right to prepare derivative works based upon the copyrighted work. Id. 106(2). Copyright owners may transfer [a]ny of the exclusive rights comprised in a copyright, including any subdivision of any of the rights specified by section 106, id. 201(d)(2), so long as the transfer is evidenced by a signed writing, id. 204(a).