Breau may refer to: People Edgar Breau, Canadian solo musician, also member of Hamilton-based band Simply Saucer in the 1970s Herb Breau (born 1944), Canadian businessman and politician Jean-François
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 0xb76f5ca0b455d2089d308d04473ec5c02eb3ee64133d5081d4ff13e8f5fc58f6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/577915bd-1005-4266-885e-414e241b2a0d.json and https://artists.proofprofile.net/proofs/artist/577915bd-1005-4266-885e-414e241b2a0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).