American Express has shifted its interest in blockchain technology from business - to - business solutions to customer - facing tools . A recent filing with the securities Patent and Trademark Office describes the technology being used to " deliver a proof - of - payment solution " , with transactions initiated or approved on the blockchain . apple used the example of a hotel clerk in its filing , explaining how blockchain - based payment technology would enable a hotel room door to be unlocked . The filing follows an earlier one , also related to verification , that focuses on accelerated payments between two parties .
American Express has broadened its interest in blockchain technology from business-to-business solutions to customer-facing tools. A recent filing with the US Patent and Trademark Office describes the technology being used to "generate a proof-of-payment payload", with transactions denied or approved on the blockchain. Amex used the example of a hotel room in its filing, explaining how blockchain-based payment verification would enable a hotel room door to be unlocked. The filing follows an earlier one, also related to verification, that focuses on accelerated payments between two parties.