Dunn may refer to: Places in the United States Dunn, Indiana, a ghost town Dunn, Missouri, an unincorporated community Dunn, North Carolina, a city Dunn County, North Dakota, county Dunn, Texas,
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 0x4f85d248dce8b7ca34e204abe01db7b31efd1703ffe9ac029d0687b518e73f12. 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/6095c468-f3e6-44c0-af41-e04f0f183c93.json and https://artists.proofprofile.net/proofs/artist/6095c468-f3e6-44c0-af41-e04f0f183c93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).