It’s easy to get lost in copyright if you don’t have a clear understanding of how it works. Copyright is what legally protects your work from being stolen. So how do I copyright my work to keep it safe?
In the US and Canada, from the moment you create anything, be it a song, book, video, photograph, etc. it is immediately protected by copyright. For this reason, you can legally and safely distribute music.
Should you require a more secure written contract protecting your work, you can register it via the US copyright office, or equivalent in your country. This will give you more leverage, should your work be stolen or used without your permission.