Which career role is concerned with obtaining copyrights for songs or music scores? promotersbooking agentsmusic publishersmanagers

I think this might the music publisher's role. The main focus of the role is to administer,exploit, and collect royalties for its copyright properties. Administer entails the filling of a notice of copyright in the U.S. Copyright in Washington, the issuing of licenses, collecting of royalties, and paying writers and co-publishers their share of the proceeds. Exploitation involves getting artists to record your copyrights, and extends to getting them used in films,television,radio, and TV commercials, etc. 

Monophony monophony means music with a single "part" and a "part" typically means a single vocal melody, but it could mean a single melody on an instrument of one kind or another.( just a short note ) : )hope it