Avtar Kishan Hangal (1 February 1914 – 26 August 2012) was an Indian freedom fighter and actor. His most notable roles are as Ram Shastri in Aaina (1977), as Inder Sen in Shaukeen, as Bipinlal Pandey
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 0x39494f950c0ef94e915c6360cea805babf776c72ca8f50678e96318b3a4f6b04. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50666c9a-4cf3-4790-979c-d5f76e6cc8c6.json and https://artists.proofprofile.net/proofs/artist/50666c9a-4cf3-4790-979c-d5f76e6cc8c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).