The author went a bit too much into the technical weeds to point out the more glaring failure: you don't own copyrights to the image. Talking about who 'owns'

The author went a bit too much into the technical weeds to point out the more glaring failure: you don't own copyrights to the image. Talking about who 'owns' the jpeg isn't the big deal, it's content that matters. That the image is at a URL which is fixed is a 'bad technical issue' that might even be fixable in some way in the future. But you buy make an NFT of Mickey Mouse, and literally it would be illegal to show it anyone publicly.