YMN or ymn may refer to: YMN, the IATA code for Makkovik Airport, Newfoundland and Labrador, Canada YMN, the station code for Yarraman railway station, Victoria, Australia ymn, the ISO 639-3 code
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 0xc7aa5797e5bbc385b16b36f1e97548e1be5bba89be76e077cee182e1b8d67df2. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe589e31-d19a-49aa-97d3-498ab2d42645.json and https://artists.proofprofile.net/proofs/artist/fe589e31-d19a-49aa-97d3-498ab2d42645.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).