Paul Avery (born Paul Stuart Depew II; April 2, 1934December 10, 2000) was an American journalist, best known for his reporting on the serial killer known as the Zodiac, and later for his work on the
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 0xe9d57be90c6680b2e08051ab7bbc8825378e47237911963f0cd2c54d18cab77c. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5d6c1f1-5d85-46f4-be6d-d5f60dafec8c.json and https://artists.proofprofile.net/proofs/artist/c5d6c1f1-5d85-46f4-be6d-d5f60dafec8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).