N3 may refer to: Roads N3 (Bangladesh), connecting Dhaka and Mymensingh N3 road (Belgium), one of the national roads in Belgium National Road 3 (Democratic Republic of the Congo) N3 road (Gabon)
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 0x66b022577dff8284039ff68078b029fff1cafc3c8372a16bb2f2c396fe3ce45a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7d90f85-e8ad-45b9-af74-3dbd78516393.json and https://artists.proofprofile.net/proofs/artist/d7d90f85-e8ad-45b9-af74-3dbd78516393.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).