@Vtrain56 I'm not surprised that Distrokid requires the same thing because they're just trying to cover their asses in case of anything legal popping up. Even in the 90's I did a mixtape and had it duplicated by a company (back when it was an actual tape!) and even THEY asked me if the content of my tape was all mine. When I said it was a DJ mixtape, they had me sign a waiver lol. And what's funny is I sold it in a small record store, and they didn't care. Ah, the good ol' days....
But all the sites where you can upload your music will require that your music be 100% sample-free. There's Audiomack, Audius, Bandcamp, etc. Speaking of Bandcamp, I saw this the other day:
The whole legal aspect of sampling has really ruined it for a lot of people, even big name producers. It's one thing for someone to sample a big portion of a song and make millions off of it, and it's another for a bedroom producer to sample a 1-bar piano and make beats for fun and no profit. However, the law says it's the same for some reason.