If I mint an NFT that just points to some artwork hosted on IPFS have I infringed on the copyright of said artwork? My NFT only contains URLs, not the artwork, after all.
Twitter seemed to have thought of this for their pfp implementation, they have the user upload the image rather than pulling it from the URL referenced in the NFT which puts the copyright violation onus on the user, not Twitter. It was pretty amusing when Twitter released their NFT integration and people started complaining that they weren't verifying the legitimacy of the NFT collections. Of course, the notion of a "legitimate collection" implies the existence of some centralised authority to distinguish between the real BACY and a copy.