M6, M06, M.6, or M-6 may refer to: Military M6 bayonet, a bayonet for the M14 rifle M6 bomb truck, a truck used to move bombs during World War II M6 gun motor carriage, an American World War II
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 0xc68b3521da5f07938af7d9ed5a014e7cdf7a31a9a8a1f3b259441a28d3223436. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5040632f-773a-4885-bba1-f4644f8114b0.json and https://artists.proofprofile.net/proofs/artist/5040632f-773a-4885-bba1-f4644f8114b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).