Tess or TESS may refer to: Film and television Tess (1979 film), a 1979 film adaptation of Tess of the d'Urbervilles Tess (2016 film), a South African production "Tess" (Cold Squad), a 1998 televi
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cda8ff07fece9b1cab0feb451f2fadfcd45db28a1a0f2b09fe8c08bcd5e1f5. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b08930d9-8719-4c15-8c08-6837a4ce6f8a.json and https://artists.proofprofile.net/proofs/artist/b08930d9-8719-4c15-8c08-6837a4ce6f8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).