REDIRECT Dear Canada Category:2013 children's books Category:2013 novels Category:Children's books about the Holocaust Category:Children's books set in the 1940s Category:Children's books set in Manit
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 0xfbdbd02e8b76b24db552b801b6872527ab8c746d121ac2625a4b6a2a251e412a. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f23a865-390a-44a1-ad57-80bcd0157fc4.json and https://artists.proofprofile.net/proofs/artist/7f23a865-390a-44a1-ad57-80bcd0157fc4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
SINS OF A CITY THAT NEVER SLEEPS, Vol. 2