But who will determine whether two different images are visually the same? What’s the point of a decentralized system if a trusted third party decides which im

But who will determine whether two different images are visually the same? What’s the point of a decentralized system if a trusted third party decides which images are visually equivalent? Just use that third party to register the image with in the first place, rather than in a blockchain, since that party gets to invalidate your image-hash in the chain anyway (in case your image is deemed visually equivalent to an image earlier in the chain).