Cathal Coughlan may refer to: Cathal Coughlan (politician) (1937–1986), Irish Fianna Fáil politician Cathal Coughlan (musician) (1960–2022), Irish singer songwriter
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 0x21c0d292b869b6e7b2b0d811b1e4950dc9367f371d51e9e5d1129924e99ba163. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b87578ae-7728-496d-96f6-440ceffec6f1.json and https://artists.proofprofile.net/proofs/artist/b87578ae-7728-496d-96f6-440ceffec6f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).