Reginald ("Reg") Underwood, member of the Tsawout First Nation, near Victoria, British Columbia, made his name known as an elite athlete competing in softball as an outfielder for the Victoria Bate te
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 0x2b437df2bbabe9f953c5fd7bdb4eeb2b14a6aab8608d45332aab3f8bd58201ce. Chain 2 (Bitcoin): anchored in block 953895 (2026-06-16T05:46:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ebc77df-bdee-458a-9397-d59d11fc2cc1.json and https://artists.proofprofile.net/proofs/artist/0ebc77df-bdee-458a-9397-d59d11fc2cc1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.