Jeff Jensen is an American writer and journalist. Early life Jensen is a native of Seattle, Washington, and a graduate of the School of Visual Arts in New York City. Career Jensen is a screenwriter,
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 0x337edede50c6877068efccfb396da0f7afd0eac66309b9c1ed132bbda6d0af37. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f50e029e-bf01-47d6-b3c8-4e857015dcb0.json and https://artists.proofprofile.net/proofs/artist/f50e029e-bf01-47d6-b3c8-4e857015dcb0.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.