thumb|Embers of coal thumb|A bonfire in rural Australia, with a large number of sparks being blown by the wind; sparks are akin to embers in a similar way that dust is to stone. thumb|Embers of firewo
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 0xb46f0b85f62ae75d23c4488c9e654b003a864761a9f7bf54c9d1e3dee52355a9. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac1236b4-98e7-4efa-8861-5e7dd9692b11.json and https://artists.proofprofile.net/proofs/artist/ac1236b4-98e7-4efa-8861-5e7dd9692b11.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).