thumb|right|260px|Denmark 2021 PHoto Hreinn Gudlaugsson Staffan William-Olsson (born 13 December 1959) is a Swedish jazz guitarist in the band The Real Thing who has worked with Bob Berg, Lee Konitz,
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 0xb6a8983211446f8f45cb716e985e8b3e33090b08127b892dae9a723e2f8bf947. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c1e28bc-ca41-4e00-9f8c-8e47f6ce8302.json and https://artists.proofprofile.net/proofs/artist/3c1e28bc-ca41-4e00-9f8c-8e47f6ce8302.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).