thumb|right|During the 2014 London Marathon, a police officer keeps spectators behind a fence, while first aiders patrol. thumb|right|Garda Síochána officers on guard duty at a cleared street in Dubl
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 0xfd9336259cb9b1418df3da8cc99ae259e9fbed32577d6eddd88f63354132752b. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcbf3f7c-0df7-4d7f-9441-03c7ca00f61b.json and https://artists.proofprofile.net/proofs/artist/bcbf3f7c-0df7-4d7f-9441-03c7ca00f61b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).