right|thumb|The mounted archer represented the quintessential samurai. The were members of the professional warrior class in pre-industrial Japan, who served as retainers to the lords. These men came
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 0x296e8896d8c5d43779cb046d6a750a14e6ad66f8c7bb01a18dc4615c6354dfd7. Chain 2 (Bitcoin): anchored in block 954039 (2026-06-17T03:00:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e3345e4-0252-46dc-91a7-5808a0a4f06a.json and https://artists.proofprofile.net/proofs/artist/3e3345e4-0252-46dc-91a7-5808a0a4f06a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).