[MrVandemar]

I think it's clear the poster means "material the users do not own the rights to" by "copyright material".

That said, you can legally post material that you don't own the rights to as long as you have licence, or a licence to do so (ie. Public Domain, CC-* material) as long as you abide by that licence.

[boeing767]

Yeah, and I need a way to screen for people who upload stuff that isn't theirs and selling it.

I think that's a huge legal liability.

Maybe for this business I finally need to set up an LLC.

I heard Gumroad has tons of outsourced workers in India literally manually going through uploads to check for this.

I'm not sure what I have to do, but I hope it won't come down to that.