American Express is on the hunt for better ways of proving when transactions occur and a new patent filing suggests the financial services giant may be looking at blockchain as part of a possible solution. In a patent application released by the U.S. Patent and Trademark Office last week, American Express Travel Related Services describes using a "blockchain-based system" in order to receive "payment confirmation including a transaction amount and a merchant identifier." The concept is aimed at adding to what AmEx calls the "limited" number of options for generating quality evidence that payments happen between merchants and their customers "beyond a receipt or ticket. American Express says that data can be used to "unlock a hotel, rental or shared economy property door using the card to look up proof of payment on a blockchain." Moreover, "the system may be leveraged to provide ticketless access to venues to a customer," and so forth.
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