thumb|The Burbant tower thumb|The procession of Giants - Goliath and his wife thumb|The bell tower of St. Julien's church Ath (; , ; ; ) is a city and municipality of Wallonia located in the province
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 0xc8125167c38a85d25dd0c42495320443fa833dc53ea5654c36797e81cd778015. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57d87d78-9819-4e8f-a47a-550699585336.json and https://artists.proofprofile.net/proofs/artist/57d87d78-9819-4e8f-a47a-550699585336.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).