Jack Duffy (September 27, 1926 – May 19, 2008) was a Canadian actor, singer, and comedian. Life and career Duffy was born in Montreal and raised in Toronto, and had one sister, Violet Duffy. He dropp
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 0x81a85f4a644835b7e106db39196d13076b7df4b0c49760f8d70d5e9b2fd1a05e. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/021cef63-03f6-4369-b4c6-faf7dda3b8e4.json and https://artists.proofprofile.net/proofs/artist/021cef63-03f6-4369-b4c6-faf7dda3b8e4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Where the Streets Have No Name (2023 Remastered Version)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f8b6d2b79208f692ab9735bd66c503ee161f0a9f6b854ec844d58cac985a3c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHR2360935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0795797068437498a11d8f2779b4f1e86f0454188b49f8f3456dc686f9eaa513. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIG2466425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c3b08fb4aae913cf7d17ee59969284efce0a240bb3ca624966c1ce78d79d42. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIZ2470194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f22386e1b9e0cf47f7577bc650b2f63edf1d4b246e8a9560d84920dabaeb6f4. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJD2587824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1488d970385123aa922d48eb014b59576a5714c652fc5ed8d4edad6645d5b3a8. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJH2593092.