In a patent application published by the United States Patent and Trademark Office, American Express will describe the use of "a system based on the chain of blocks to receive payment confirmations, which include amounts and identifiers". The idea is to generate evidence that payments between merchants and customers can occur optimally, beyond any payment receipt.
According to American Express, the patent seeks to retain transaction and contractual data as required. The system "may be used to provide access without physical evidence to places such as movie theaters, sporting events, concerts, among others." At the moment it has not been defined whether the system will be hosted in a private or public network.
It is worth noting that the company has begun to carry out initial tests with a membership rewards program for the owners of the cards, taking advantage of Hyperledger's Blockchain technology. Precisely, with them there was a merger last January