Chan Chan (), sometimes called Chimor itself, was the capital city of the Chimor kingdom. It was the largest city of the pre-Columbian era in South America. It is now an archeological site in the depa
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 0x1e09b90cb76c8dc771294a27e5599770ae8e62125b39047f78311199bc5a539a. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb5629a7-e5aa-4658-91f1-c7615842d36d.json and https://artists.proofprofile.net/proofs/artist/eb5629a7-e5aa-4658-91f1-c7615842d36d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).