M24, M.24 or M-24 may refer to: Military HMS M24, a Royal Navy M15 class monitor HMS M24, Royal Swedish Navy ship, (see List of mine warfare vessels of the Royal Swedish Navy) M24 Chaffee, an Amer
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 0x943f1d0463279f9144e26aeec3809d03889d961b84257b805250534a051405b9. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f330364-92ea-43d4-be63-58644e0d1dda.json and https://artists.proofprofile.net/proofs/artist/9f330364-92ea-43d4-be63-58644e0d1dda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).