Abstract: A method for validating ticket authenticity includes: reading, by an optical imaging device interfaced with a computing device, a displayed machine-readable code encoded with a ticket identification value; receiving, by a receiver of the computing device, at least a digital signature from a mobile computing device; identifying, by the computing device, a blockchain data entry included in one of a plurality of blocks comprising a blockchain, wherein the blockchain data entry includes at least the ticket identification value and a public key of a cryptographic key pair; validating, by the computing device, authenticity of a ticket based on validation of the digital signature using the public key; and outputting, by the computing device, the result of the validation of the authenticity of the ticket.