These days, as long as you upload to a site (SoundCloud, SoundClick, Bandcamp, youtube, etc.) that has a date stamp on it, you can at least show that 'you' were there first.
The best, and most sure way is still to register the lyrics and melody and/or the 'sound recording' with the US Copyright Office.
*The reality though is that none of us here are Bob Dylan, Cole Porter, or Jimi Hendrix, and the likelyhood of someone stealing our music and turning it into gold (to semi-quote John Stewart) is probably very very slim. Sorry, but come on ...
The best, and most sure way is still to register the lyrics and melody and/or the 'sound recording' with the US Copyright Office.
*The reality though is that none of us here are Bob Dylan, Cole Porter, or Jimi Hendrix, and the likelyhood of someone stealing our music and turning it into gold (to semi-quote John Stewart) is probably very very slim. Sorry, but come on ...