US Patent 11790460 Blockchain event logging between companies

A system and method using blockchain for monitoring and tracking service provider involvement in a transaction on behalf of a customer company. In the system and method, session information related to the transactions are encrypted using an encryption key specific to a company on whose behalf the service provider is acting. The encrypted action is signed the with a private key of a public/private key pair. The signed, encrypted action record is placed on the blockchain, which can later be accessed to review the actions on behalf of the specific company.