Reply to Copyrighting / Distributing your music!

Hey Guys,

I have a few questions to ask! My friend and I have been producing together, and he created a label, and we want to put up a few tracks on like either my blog or sound cloud. However i'm scared about putting it up and having my ideas and music stolen, I was wondering do you know how I should go about copyrighting my tracks? And is there anything else I have to worry about with a new label and distributing music?

I did go and look in the thread section "Music Industry / Legal / Marketing", but those are just quick write up's, I am looking for real insight and real experiences that you guys have gone through.

Thanks.