Muriel may refer to: Places Muriel de Zapardiel, a municipality in the province of Valladolid, Spain Muriel, Zimbabwe, a settlement Muriel Lake, British Columbia, Canada Muriel Lake (Alberta), Canada
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 0x9490923e3e2b465a9be0f1c77aaac42ba8ae9163d9642bf5932246c104149cd3. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab500ce5-09f3-4130-8684-c0e2cab1260e.json and https://artists.proofprofile.net/proofs/artist/ab500ce5-09f3-4130-8684-c0e2cab1260e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).