The most well-known copyright lawsuit involves Yuga Labs and artists Ryder Ripps and Jeremy Cahen in the Bored Ape Yacht Club (BAYC). The latter was ordered to pay the former 9 million dollars, claiming that both artists clearly violated copyright laws and maliciously misappropriated trademarks for profit.
US Patent and Trademark Office's NFT Intellectual Property Report: Existing Laws Adequately Regulate NFTs, No Need for New Legislation