thumb|right|Traditional fishing pirogue (a lakana outrigger canoe) with sail from Madagascar thumb|right|Group of pirogues at sunset on the river bank of Don Tati, Si Phan Don, Laos thumb|right|Pirogu
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 0x57b8a55e19ef0bb5cf4a0156358f4d552a8fc4f93acf49a02ec7a8dfaa8cbd25. Chain 2 (Bitcoin): anchored in block 953963 (2026-06-16T15:12:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26fc8fc3-b468-4673-9802-566ea30a8fc3.json and https://artists.proofprofile.net/proofs/artist/26fc8fc3-b468-4673-9802-566ea30a8fc3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).