I love this idea! Sure, they'll be issues with people uploading work they don't legally have the right to use, but I'm not sure how you could go about correcting that. Although, this issue could blossom into a very serious pain-point for many artists, so we will have to see how the overall market pans out.
I love this idea due to it's interesting concept, but who knows what the future will bring lol :^)
Neat idea and very simple to get setup and list photos [ if you have a Blockstack account ]
will have to see how many customers are willing to buy on here