If you really want to get confused, read KAPA's position on back up's.
They say since music cd's/cdg's fall under the Phonograph record catagory, and not software you are not permitted to make an archive copy. Here's the link to their site.
http://www.karaokeantipiracyagency.com/faq.html
Start researching the websites for copywrite laws and form your own conclusions. This is too confusing an area to expect others to tell you what to do, and then blame them later on if it was incorrect advice.
George