thumb|Hop flower in a hop yard in the Hallertau, Germany thumb|Cross-section drawing of a hop alt=Full grown hops .|thumb|upright=1.3|Fully grown hops bines ready for harvest on the Yakama Indian Rese
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 0x19bc4acfe7d5e12b4a04fde0a87aba0aedea40d049e3e19502d8cd329e4dd1a4. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1adaa1fc-cf58-4a40-b5bb-5dbf38db26e0.json and https://artists.proofprofile.net/proofs/artist/1adaa1fc-cf58-4a40-b5bb-5dbf38db26e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).