Eli Hirsch (born 1938) is an American philosopher and the Charles Goldman Professor of Philosophy at Brandeis University.Brandeis University faculty guide, retrieved 2010-06-26. Hirsch received a B.A
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 0x37b8d7ef8b0af8cc89758a7f92b3b6faff8bcfaf2a0c79b4e44d86c97589a2df. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/370decd3-6e55-4be6-9391-c1563f0be530.json and https://artists.proofprofile.net/proofs/artist/370decd3-6e55-4be6-9391-c1563f0be530.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).