This is kind of a no-brainer. If you're worried about your music being stolen, yes.. register a copyright. If you want to get your royalties if and when an artist actually goes through the correct means to register their song with a PRO, then yes.. Submit the song info to your PRO.
Of course Drake doesn't handle this stuff. Dude doesnt even order his own Cosmopolitans at the bar. He has a well-paid team. But if you're small-time, these are things you end up handling yourself. It takes mere minutes to file these items online. Very easy, and as I said, very obvious.