Abū al-Khayr Muḥammad Ayyūb ʿAlī al-Māturīdī (; 1919–1995), or simply Ayub Ali (), was a Bangladeshi Islamic scholar, author and educationist. He was awarded the Ekushey Padak in 1976 by the Governmen
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 0x9dae2c7f294c7a842693ffa1d653a3b5dd5b609e77ab0e039e8cd0714e40aae7. Chain 2 (Bitcoin): anchored in block 954020 (2026-06-16T23:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37d6714f-82f4-441e-b6b0-f326491b6962.json and https://artists.proofprofile.net/proofs/artist/37d6714f-82f4-441e-b6b0-f326491b6962.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.