blockchain as a service [BaaS]; blockchain as a service [BaaS] for creating and managing virtual goods authenticated by non-fungible tokens [NFTs]; blockchain-as-a-service [BaaS]; computer security services in the nature of providing authentication, issuance, validation and revocation of digital keys; authentication, issuance and validation of digital keys; certification of data provided via blockchain technology; certification of data via blockchain; certification of data via blockchain technology