M11 or M-11 may refer to: Aviation Miles M.11 Whitney Straight, a 1936 two-seater light aircraft Shvetsov M-11, an aircraft engine produced in the Soviet Union Science Messier 11 (M11), an open
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 0x360a9e4447bbe57cc99247a857dc8b5bb0246c5e8b70e1cdeb1ce58f39f19b2b. Chain 2 (Bitcoin): anchored in block 953886 (2026-06-16T04:37:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b26c3fb-ba7e-47f7-a3cd-12fd41e540d0.json and https://artists.proofprofile.net/proofs/artist/0b26c3fb-ba7e-47f7-a3cd-12fd41e540d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).