This is what my criticism is, as well. A few days ago I had been pondering a similar concept of a blockchain-based platform for tracking image ownership. The main blocker I encountered while thinking about it was the problem of immutability. Specifically, what happens if something is wrong?

Like, the first problem I see here is a troll just importing images from all over the Internet and claiming ownership. If something like this happens, would it be possible for the actual artist to ever regain "ownership"?

You really think someone would do that? Just go on the blockchain and tell lies?