Moonheart is an urban fantasy novel by Canadian writer Charles de Lint. In the story, Sara Kendell and Jamie Tamson, owners of an antique store, enter the Otherworld, and have to team up with a wizar
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 0x08f656502f047ea2435bfdbabaa3fde90c80c6d6222908879e9cebd6ca723537. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c2d775a-d361-4330-a6fa-c1ff64735da4.json and https://artists.proofprofile.net/proofs/artist/4c2d775a-d361-4330-a6fa-c1ff64735da4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I'm Gonna Sit Right Down and Write Myself a Letter