American Express introduced its NFT copyright stamps for its US Amex cardholders, providing a blockchain-based way to mark their travel experiences. This new feature enables Amex consumer card members to collect digital stamps stored as ERC-721 non-fungible tokens (NFTs) on Ethereum's layer-2 Base network. With every digital stamp people can records the country that was visited, it... https://www.coherentmarketinsights.com/news/amexs-new-nft-copyright-stamps-share-journeys-not-data-1546