I'm trying to find copyight free music for my game, and was checking to see if those "copyight free" songs were ok? 

Was using this website, and there are some copyright free songs I want to use:

https://eproves.com

I'm just wondering the legality of using something like this for my game. I don't really care much about "owning" the song, moreso I want to able to charge money for game without any legal loophole of some company saying I copyrighted their music.

I'd look into the Creative Commons license and find music that uses it.

Kevin Macleod songs are copyright free, you should download them from a website

It's hard to find stuff in the public domain, but for assets under open licenses, try Open Game Art.

The issue isn't copyright. You need a royalty-free license.

There are several artists on itch.io who have released free music packs and give you a license to use it royalty-free in games.  Search itch.io assets with "Royalty Free Music".

Try finding them in sites such as Incompetech and Soundimage.org.