upright=1.2|thumb|Burning of Judas Iscariot, Brazil, 1909 thumb|upright=1.2|Effigy of Ravana, a figure from the Ramayana, with burning sparklers, in Manchester, England, in 2006 An effigy is a sculptu
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 0xb1920c4cdfb0c8c712e1b1814fa23a95c3c64804ba3c72c9c93fbabc4a58b0c1. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fd24fb5-b2d6-4f9d-a2ac-24bb660241bc.json and https://artists.proofprofile.net/proofs/artist/9fd24fb5-b2d6-4f9d-a2ac-24bb660241bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).