Are all songs copyright if you didn't create them?

Question

For example: I put the song "ElVira" by the oakridge boys inside a video I created. That's a really old song and I'm not sure who owns the copyright at the moment. Does this mean it's non-copyrighted? I'm putting this in the selected cateogory because my friends and I made a video with a "possibly" copyrighted song. Could we get sued or is it not copyright on account of how long it's been since the creation of the song?

Answer 1

most are..