thumb|Rob Lutes Rob Lutes (born 1968) is a Canadian folk and blues musician with the band Sussex."Rob Lutes leaves his comfort zone for Sussex". Montreal Gazette, February 3, 2016. He is also a solo a
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 0xffc31c0ee308f694d6eb892f3f3b71119e3514d936481e32d2ccab0a5617aa7f. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9a48db0-fa6c-4dbd-9cbe-509a3d312eaa.json and https://artists.proofprofile.net/proofs/artist/a9a48db0-fa6c-4dbd-9cbe-509a3d312eaa.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.