Leather Face, also known as Farzand-e-Watan, is a 1939 Indian Hindi-language action film produced and directed by Vijay Bhatt for his production company Prakash Pictures. Bhatt cast the young Mahjabee
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 0xe77fb4129d6a3aed992e7c438d06a7801de6a48c527ed1ab3ea52eab0f7af08a. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/400f8c6c-17f9-4cff-b5ae-97d4fe24611b.json and https://artists.proofprofile.net/proofs/artist/400f8c6c-17f9-4cff-b5ae-97d4fe24611b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).