thumb|right|290px|Throngs before the Imperial Palace in Japan awaiting the appearance of Crown Prince Hirohito for the recent proclamation of his official recognition as the heir apparent to the Japan
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 0x1e6a8622cfbeb259f3633473853f908e4d3b0a04c83b5f34109f72a12138201d. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b4ee663-90a0-4b75-89b6-ffbbfeef6e1f.json and https://artists.proofprofile.net/proofs/artist/9b4ee663-90a0-4b75-89b6-ffbbfeef6e1f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.