Aaron Karo (born June 18, 1979) is an American screenwriter, comedian, and author, best known for his Ruminations email column and series of books, his young adult novel Lexapros and Cons, his Comedy
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 0x60e61c163ea611e68eb68fb0cf99871d74a7967f4bd05a3ba631b8f393d4dd4d. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d5dfe5f-7632-4e3f-83b8-68cd5e16c866.json and https://artists.proofprofile.net/proofs/artist/8d5dfe5f-7632-4e3f-83b8-68cd5e16c866.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.