Sandeep Singh Sidhu (2 April 1984 – 15 February 2022), also known as Deep Sidhu, was an Indian film actor and Sikh activist. He worked in Punjabi films, starting his acting career with the film Ramta
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 0x3afb04504e6615b29405fbf0610ae90141cabeda96f148c1cdd4024ca02673a3. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0cf52e7-8ca1-491a-ac88-28a48c509fc2.json and https://artists.proofprofile.net/proofs/artist/a0cf52e7-8ca1-491a-ac88-28a48c509fc2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).