Munawwar Sultana (8 November 1924 – 15 September 2007) was an Indian cinema actress, who acted in Hindi films. She is cited as one of the "popular" actresses of the late 1940s to early 1950s period, a
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 0xdbfcd07d177d1c00334b435945eb81bb2d827762e513c91392ad4e2ec4ddf256. Chain 2 (Bitcoin): anchored in block 954097 (2026-06-17T13:13:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ad3646f-3b09-4711-acd6-9e14b27bd1e3.json and https://artists.proofprofile.net/proofs/artist/7ad3646f-3b09-4711-acd6-9e14b27bd1e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).