what legal actions do I need to do in order to create a soundtrack for a documentary?

[fiddlephreak]

what legal actions do I need to take in order to create a soundtrack for a documentary?
what forms do I have to fill out?
I know every song has to be copyrighted individually with permission from every artist.

 

[seniorjudge]

what legal actions do I need to take in order to create a soundtrack for a documentary?


How will you create it? It makes a lot of difference to the answer.