thumb|Earth model with circles of latitude in black and indications of the North Pole, Equator, and the northern and southern hemispheres. thumb|upright=0.9|right|Earth's graticule. The vertical lines
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 0xb76dfe96f607a4ffba16def9f9f5b24b204fc988d79d55f63c31f4f4f4382fa4. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e8e4479-0f23-4494-876a-bb8e9bab749a.json and https://artists.proofprofile.net/proofs/artist/1e8e4479-0f23-4494-876a-bb8e9bab749a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).