Yakub, Yaqub, Yaqoob, Yaqoub, Yacoub, Yakoob, Yakoub, Yoqub or Yaâkub (, also transliterated in other ways; Yakob, as commonly westernized) is a male given name. It is the Arabic version of Jacob and
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 0x9cd32256603ddfe26bb95e8e36993a252fdad89125ae27b994c991c571b93233. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cccfbb5b-eb73-4123-a483-813df87d7a9f.json and https://artists.proofprofile.net/proofs/artist/cccfbb5b-eb73-4123-a483-813df87d7a9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).