Kamal Choudhary (born 1989) is an Indian American physicist and computational materials scientist in the thermodynamics and kinetics group at the National Institute of Standards and Technology. He is
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d825e058a0b62a0685bd857aa7e0f3465865864a567dcb3047c815f9e8d079. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cae8a89-c5d7-4cce-b7cb-169651609abc.json and https://artists.proofprofile.net/proofs/artist/1cae8a89-c5d7-4cce-b7cb-169651609abc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).