MB, Mb or M. B. may refer to: Businesses and organizations Mälarhöjden/Bredäng Hockey, a Swedish ice hockey club Manila Bulletin, a newspaper based in the Philippines Media Blasters, an American m
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 0xc5449d8c8b38f880e833fe87d659aa778a87b4c5d64d4cbe71493360d0670b31. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d8ae2b2-49dd-40e3-be5a-9d601b2b6f30.json and https://artists.proofprofile.net/proofs/artist/1d8ae2b2-49dd-40e3-be5a-9d601b2b6f30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).