M30 or M-30 may refer to: Science Messier 30 (M30), a globular cluster in the constellation Capricornus Transportation Vehicles BMW M30, a 1968 automobile piston engine HMS M30, a 1915 British Ro
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 0xfcfc3144e64d228c48ddfe659c33b8306b4495309e8c22399f1bb41ebe0b026a. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dec3589-9d63-4e45-9b85-5ee14ddb1ced.json and https://artists.proofprofile.net/proofs/artist/0dec3589-9d63-4e45-9b85-5ee14ddb1ced.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).