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 0x982df9151bd914fab0cba03d03e6cc90df965dcc91213d6c68bfe477dd7fff48. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ee62513-9cf8-41ff-ad97-12a7acd72535.json and https://artists.proofprofile.net/proofs/artist/3ee62513-9cf8-41ff-ad97-12a7acd72535.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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Holiday Wedding [Cannon Brothers, Book 2 (Unabridged)]
Tangled Up [Bachelors of Buttermilk Falls, Book 2 (Unabridged)]
All Dressed Up [Bachelors of Buttermilk Falls, Book 6 (Unabridged)]
Kiss and Make Up [Bachelors of Buttermilk Falls, Book 3 (Unabridged)]
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