thumb|George W. Bush delivers the eulogy at Ronald Reagan's state funeral, June 2004. A eulogy (from , eulogia, Classical Greek, eu for "well" or "true", logia for "words" or "text", together for "pr
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 0x2584952e65af29927b1594aa84fb26a960b96a53da8d8e883abf048183a90b3a. Chain 2 (Bitcoin): anchored in block 953982 (2026-06-16T17:42:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ce73104-2ad3-41ba-a90c-34af37e7bcfe.json and https://artists.proofprofile.net/proofs/artist/2ce73104-2ad3-41ba-a90c-34af37e7bcfe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).