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 0xe46f3a7dd32b0c72dc1aad4b688366da98b154a7c68022eb6d80e38dc62c3d4f. Chain 2 (Bitcoin): anchored in block 953975 (2026-06-16T16:53:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b3384e4-3d29-4bc6-904b-1aee12ccaee1.json and https://artists.proofprofile.net/proofs/artist/2b3384e4-3d29-4bc6-904b-1aee12ccaee1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).