thumb|Nova Scotia Community College Waterfront Campus in Sydney, Nova Scotia thumb|Los Angeles City College campus in East Hollywood, California, A community college is a type of undergraduate higher
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 0xcfa0457c9c5c4dd880d10c6a3edeede43c5a1e9f44359139b34c5388f8ca15a2. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17147660-81a6-41cb-a10a-84dcd58ab8e3.json and https://artists.proofprofile.net/proofs/artist/17147660-81a6-41cb-a10a-84dcd58ab8e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).