Lynard... Its gonna take some time to wrap your mind around the copyright dos and don'ts...But it beats paying a cheesy lawyer
go here
http://www.copyright.gov/
When you get there, register with the eCO logon page.
Once you are registered, you'll have an account set up with your ID...From there on you'll have options about submitting a song as the artifact for your copyright.
Keep in mind, there are individual work submissions, and then collective (or serialized) works.
Now I could be wrong here...But Collective to me means something like a CD.
What I am doing with my music is submitting each song as an individual work... by that I mean I get a scratch track of the music and lyrics down into mp3 format and submit that song as the work. (Also I claim it as my production, music , lyrics,, pretty much everything.)
Later when it comes to a finished CD, you can claim the CD as a workand/or collection (I'm fuzzy on that rule). Note: The Cd would use your songs with permission, and if the songs have been altered or enhanced for the CD they become a "derivitive" work included in the package.
Now dont confuse royalties with copyrights...
Royalties come in many forms (SOmetimes hard to enforce) of payments for exploitation of your work. Ina CD its presumed (regardless of songs used by permission) that everybody gets their appropriate share of royalties from the sale and broadcasting of the work.
The Copyright protection simply reconciles any false claim as to who was/wasn't allowed to use the work for profit. So technically Your Copyrighted song cannot be used by anyone else without your permission.
CREATIVE COMMONS
A bullshit twist of copyright claims... Its designed to give partial rights (i.e mechanical) to John Q Public or Suzi Q Private Corp...or anybody who figures a way to exploit your work, profit and not necessary compensate you for it... My opinion on it: "f**k THAT"! Never give Creative common rights. If somebody needs your work, they need to be asking you permission and you need to be negotiating a payment from them, if they use it.