Benjamin Jaffe (born January 26, 1971) is the creative director of Preservation Hall and plays tuba and double bass with the Preservation Hall Jazz Band. Early life and education He is the son of Pre
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 0x56f5bac0ccd1031396946951d44a4cd32b0e5ab2e27cedaeaf1eabd56a2140e5. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9963fe5-e9ee-4728-ac98-5f2d7c3bc8a5.json and https://artists.proofprofile.net/proofs/artist/d9963fe5-e9ee-4728-ac98-5f2d7c3bc8a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).