Jay-Z is a credited songwriter on Drake's new song. Solar Eclipse lists 13 writers, including Drake, Don Toliver and Shawn Carter. Six of the credits connect to Bun B's Get Throwed from 2005. Meanwhile, some said DJ Akademiks reported that Drake surrendered publishing income. But songwriter credits don't establish the actual royalty split. I traced the music rights through Sony Music Publishing, Domain Capital Group and Universal. Here's what the documents prove, and where they stop.