MBM may refer to: Businesses and organisations MBM (architecture firm), a Spanish company Meadowbrook Meat Company, a subsidiary of McLane Company McKee-Berger-Mansueto, an American construction c
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 0x02959f5bd1ede3383b9f782a51512e0c2f73c2a9802be41f5fb42ce8e6e8303a. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c63d9e53-257d-4e8c-a4c8-bdb657489e27.json and https://artists.proofprofile.net/proofs/artist/c63d9e53-257d-4e8c-a4c8-bdb657489e27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).