copyright music lyrics

sources: http://www.riaa.com/physicalpiracy.php?content_selector=piracy_online_the_law
http://www.copyright.gov/help/faq/faq-duration.html
http://www.pdinfo.com/proof.php
When you right a song you get copyright laws before you publish it. Copyrights last the rest of the authors life plus 70 years after.To have copyright lyrics means you own  that song that you made it. proof of public domain means that its notified.