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 0x49ed7bdeacff31e286a213e7ae7155a7ea4e76f565b6bf07e3fea1e30cceb8e1. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef901fdb-2da5-4dee-859b-a0c4e4e6edda.json and https://artists.proofprofile.net/proofs/artist/ef901fdb-2da5-4dee-859b-a0c4e4e6edda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
What He Doesn't Know [What He Doesn't Know Duet, Book 1 (Unabridged)]
What He Always Knew [What He Doesn't Know Duet, Book 2 (Unabridged)]