Bobby, Here is a website that you may want to look at - -> http://myfreecopyright.com. If I understand it correctly this site does not give you the right to sue for damages if someone makes money off your song without your permission but it will prove that it is your song and keep them from using it in the future. You can registering thru US copyright for a fee and get full protection. I used the http://myfreecopyright.com myself. I don't want to pay for something that I may never need or use.

Hope this helps.
Steve


Steve