Julie Buxbaum (born 1977) is an American lawyer and novelist, who specializes in young adult novels. Her first two novels were written for adults, but Buxbaum has told interviewers she enjoys writing
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 0x32733261f6b4f6c7afbbd325c15507027ab016ae2da848bde9e7fbe8b43cda4f. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c12d168d-924e-4403-8cea-85d5dbc941e1.json and https://artists.proofprofile.net/proofs/artist/c12d168d-924e-4403-8cea-85d5dbc941e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).