Dan Gibson (January 19, 1922 in Montreal – March 18, 2006 in Toronto) was a Canadian photographer, cinematographer and sound recordist. Career During the late 1940s, Dan Gibson took photographs and m
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 0x5ac4e8827fbb67eff1269dfaa0d88123e5c9ee112fbc64d3feb5a464e001d460. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4377a12-17d8-4f17-a600-9e3ab2a160d4.json and https://artists.proofprofile.net/proofs/artist/c4377a12-17d8-4f17-a600-9e3ab2a160d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).