The process of minting NFTs presents copyright problems for both copyright owners as well as NFT purchasers. Purchasers see the NFT as an imprimatur of authenticity, but anyone can mint an NFT of any digital file. Minting an NFT typically involves storing a copy of the digital file on a server, but only the owner of the copyright in the underlying work can make copies of that work.
Source: Minting, distributing and selling NFTs must involve copyright law