Software as a service (SAAS) services featuring software for cryptographic timestamping, content fingerprinting/digital watermarking, digital signature verification, transparency logs, and issuance/verification of proof receipts for digital artifacts.; Software as a service (SAAS) services featuring software for creating, minting, and managing non-fungible tokens (NFTs).; Authentication, issuance and validation of digital certificates; Issuance and validation of digital certificates