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 0x5050bc2910ae9d210c0e90b29374be300fba8dfeb0792d2357951e72f6fe8e21. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3382cd5-5943-4c9a-a6fa-a4ef7885e8a1.json and https://artists.proofprofile.net/proofs/artist/a3382cd5-5943-4c9a-a6fa-a4ef7885e8a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sourates Maryam, Ta Ha, Al Anbiya, Al Hajj (Quran)
Sourates Az Zukhruf, Ad Dukhan, Al Jatiyah, Al Ahqaf (Quran)
Sourates At Tur, An Najm, Al Qamar, Arrahmane, Al Waqia, Al Hadid (Quran)
Sourates Sad, Az Zumar, Ghafir, Fussilat, Achoura (Quran)
Sourates Al Ahzab, Saba, Fatir, Ya Sin, As Saffat (Quran)
Sourates Muhammad, Al Fath, Al Hujurat, Qaf (Quran)
Sourates An Nur, Al Furqane, As Shuaraa, Naml (Quran)
Sourates Ibrahim, Al Hijr, An Nahl, Al Kahf (Quran)
Sourates Al Qassas, Al Ankabut, Ar Rum, Luqman, As Sajda (Quran)