M17 or M-17 may refer to: Roads M17 road (Ireland) M17 road (Bosnia and Herzegovina) Highway M17 (Ukraine) M-17 (Michigan highway) M17 (East London), a Metropolitan Route in East London, South
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 0xde03b3804f35e3aacf1666a8dfd99774fbcb10d6a975441c3864e7c0ab11b549. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/746ff9ac-4ca8-4a0c-974e-0379d5c4096f.json and https://artists.proofprofile.net/proofs/artist/746ff9ac-4ca8-4a0c-974e-0379d5c4096f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).