Big man may refer to: Film and television The Big Man (1908 film), a Russian short drama film The Big Man, a 1990 British sports drama film Big Man (TV series), 2014 South Korean TV series Big Men
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 0xb153be365ed18b01751a2497c310270655249effc1bc8c0cb0d264c9eba63b43. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f07a214-449c-4158-8eae-c570971f7ff0.json and https://artists.proofprofile.net/proofs/artist/4f07a214-449c-4158-8eae-c570971f7ff0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).