Public Domain Music Library

Where I can know if a piece oldest music is in the public domain?

Or if not on the EP, the holder of the rights of current author. They usually tell people to try the local library with questions such as research, but nobody in my audience knew libaray which direction to point me in

try looking up on the internet, and trying to find support near you, that does wonders normally. if you do not get enough ideas, email me for more blizzard_girl_2005@yahoo.com