Most art NFTs do not include an actual copy of the content, but instead merely point to a copy somewhere off-chain on the internet (e.g., on a server). For a content creator who discovers a counterfeit NFT of his or her art, this means that Notice-and-Takedown is mostly limited to targeting and removing that NFT’s marketplace listing.
Source: Will NFT Piracy Compel Changes To The Digital Millennium Copyright Act? – Technology – United States