Alifa (Bengali: আলিফা) is an Indian Bengali drama feature film written and directed by Deep Choudhury and produced by Arman Ahmed. It stars Baharul Islam and Jaya Seal. Alifa won the Best Debut Film
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 0x38bcac256e7cb2a36b4b5287ea5175cbb43cbd949d83cf20e1fcad1b83ea0056. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0afbf3d-0e30-4cc7-b49b-9c1385ae92b3.json and https://artists.proofprofile.net/proofs/artist/c0afbf3d-0e30-4cc7-b49b-9c1385ae92b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).