thumb| Wolfram von Eschenbach and his squire (Codex Manesse, 14th century) thumb|The Squire - Ellesmere Chaucer In the Middle Ages, a squire was the shield- or armour-bearer of a knight. Boys served
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c236a17b448760a9370ad6e397c8e27c5208a4f349934a775cefa6de53ab8d1. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4d4c84a-f4a4-482f-91a1-90a5d6eb6e2a.json and https://artists.proofprofile.net/proofs/artist/a4d4c84a-f4a4-482f-91a1-90a5d6eb6e2a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).