Software as a service (SAAS) services featuring software for cryptographic timestamping, digital content fingerprinting, digital watermarking, digital signature verification, creating and maintaining transparency logs, and issuance and verification of proof of attestation receipts for digital artifacts; Software as a service (SAAS) services featuring software for creating, minting, and managing digital collectible authenticated by non-fungible tokens (NFTs); Authentication, issuance and valid...