thumb|The yolk of a chicken egg thumb|Diagram of a fish egg; the yolk is the area which is marked 'C' Among animals which produce eggs, the yolk (; also known as the vitellus) is the nutrient-bearing
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6902823ff72afe42ee1d967eecc78e325510b91e9507b6704c4c8c687d2b6ff9. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd7b4469-5e01-4ffc-a5c3-53a1db72f1e1.json and https://artists.proofprofile.net/proofs/artist/fd7b4469-5e01-4ffc-a5c3-53a1db72f1e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).