Qatil (translation: Killer) is a 1988 Indian Hindi-language thriller film directed by Ashok Gaikwad and produced by Shama Akhtar and Nasim Hijazi. A remake of Tapas Pal starrer Bengali film Lal Mahal
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 0xb068875148a6025fb9213b57eb21d83618c17363523b01b58ddb2177b871d553. Chain 2 (Bitcoin): anchored in block 954039 (2026-06-17T03:00:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e8fc600-bd8f-4fab-9e48-0e851f075f8e.json and https://artists.proofprofile.net/proofs/artist/3e8fc600-bd8f-4fab-9e48-0e851f075f8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).