MM or variants may refer to: Alphabets Meitei Mayek, the writing system of Meitei language Arts, entertainment, and media Music MM (album), 1989, by Marisa Monte Maelzel's metronome, a music 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 0xf8dbc65422a3023dab509b1dadd5992fb9edc0356f3b0a8f3220e1b9998fb5c0. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d43b43f8-f3e5-432f-b10f-fef8e8d9ab57.json and https://artists.proofprofile.net/proofs/artist/d43b43f8-f3e5-432f-b10f-fef8e8d9ab57.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).