thumb|230px|right|Illustration of the conspirators in the Gunpowder Plot, a secret plan devised in 1605 to blow up the Parliament of England. The plot was a failed attempt at regicide against King Jam
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 0x2a424436dd7f4a3b6dc86f6c79cde3ac6b2e8c5b7880d6fc8619b09e37ee8c7f. Chain 2 (Bitcoin): anchored in block 953847 (2026-06-15T22:51:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/010db57b-0972-4ce4-9978-ad6441911e5e.json and https://artists.proofprofile.net/proofs/artist/010db57b-0972-4ce4-9978-ad6441911e5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).