Sibella is a female given name. Notable persons with that name include: Sibella Annie Barrington (1867–1929), Canadian nurse Sibella Cottle, mistress to Irishman Sir Henry Lynch-Blosse, 7th Baronet
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 0xdf2677a9cf7fc5c352da74f502ddbcbca8411408ec090771d6c5eed075fabf56. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef7c213a-a027-457e-b24d-0ae6a470108b.json and https://artists.proofprofile.net/proofs/artist/ef7c213a-a027-457e-b24d-0ae6a470108b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).