The Bear That Wasn't is a 1946 children's picture book written and illustrated by filmmaker and Looney Tunes alumnus Frank Tashlin. Synopsis A bear settles down for his hibernation and while he sleep
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf941f42ffd1ae1bab8d41b60f39a3c9d4b255c322380cb7092bf90385cb6db4d. 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/4778ed79-dd9b-4e49-bc17-da8ba95d67ed.json and https://artists.proofprofile.net/proofs/artist/4778ed79-dd9b-4e49-bc17-da8ba95d67ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).