MF or mf may refer to: Biology Mossy fiber (disambiguation), in neuroscience Mycosis fungoides, a type of skin disease Myelofibrosis, a chronic clonal malignant disease Microfibril rosettes, the
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 0x7304bd6746f4f0b5dbfa3907829f14bc31faffee69df3bbd7916179ee9e4f05e. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d10bb1e-b630-4da2-bed6-726bb1f3aaaf.json and https://artists.proofprofile.net/proofs/artist/9d10bb1e-b630-4da2-bed6-726bb1f3aaaf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).