A guz (also spelled gaz, from Hindustani / and Persian ), or Mughal yard, is a unit of length used in parts of Asia. Historically, it was a regionally variable measurement similar to the English yard
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 0xd6593c7fd9898d75687aa9f3659a89890f3dd8e2ff087b5f1498f44391b1bfde. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b6d6b73-f6db-4af3-9ea2-3480018ef48d.json and https://artists.proofprofile.net/proofs/artist/3b6d6b73-f6db-4af3-9ea2-3480018ef48d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).