Dugan or Duggan () is an Irish surname derived from Ó Dubhagáinn. The best known family of the name had its territory near the modern town of Fermoy in north Cork, and were originally the ruling famil
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a5d075b4cd6786170c521aa4a34eb0cce8f2cbbbc53b1c06a461f620ac152f. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd56f819-8120-46ae-a2f7-7d984210e967.json and https://artists.proofprofile.net/proofs/artist/cd56f819-8120-46ae-a2f7-7d984210e967.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).