Sanju is a 2018 Indian Hindi-language biographical comedy drama film directed and edited by Rajkumar Hirani, written by Hirani and Abhijat Joshi and produced by Hirani and Vidhu Vinod Chopra under the
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 0x2945e7562e90f37cec319301b0949e4d8c9c4ce486c50fcdf19c01561e3449ad. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4636d9ad-ad11-4be0-bc6d-f762361653be.json and https://artists.proofprofile.net/proofs/artist/4636d9ad-ad11-4be0-bc6d-f762361653be.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.