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 0x6bc44aa2402feab597911868583becced98376abe48fcda8c860fe21af205ebd. 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/8d020741-983a-47b3-9c94-960b37788136.json and https://artists.proofprofile.net/proofs/artist/8d020741-983a-47b3-9c94-960b37788136.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 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 0xa41e1dc917f1f004a44d3bbbe32bd4f99ae8a1b9a2ee0e09424710a95b3b0e28. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1761978 — a six-check JSON result.
The Basket of Turf / The Hag at the Churn Jigs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb19882136b58f1e3fcd070bb97df87852eade2c3e1ec1b94fd037f14b34b02. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762034 — a six-check JSON result.
McGreevy's Favorite / Miss McGuinness Reels
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5299dad95d7ec45b890d4e5dd7fc3dbf28044f29d226720ac1932f4a9f2543a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762042 — a six-check JSON result.
The Golden Castle / Micky Callaghans Hornpipes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a17f60f659eb0d71e9a52bd3551bc2fd5998d64e4508f125eec01505240970. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762056 — a six-check JSON result.
The Jolly Seven / The Copper Plate Reels
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb98c8acfcdc6ef117b8e0bc2d0c5fa00211fe138df6527f2e22573656fe330f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762061 — a six-check JSON result.
The Boy's of Ballisodare / The Pigeon on the Gate Reels
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7fe3dd8b4578fa046882ba16cfcb81def62d40e1b1f39cff377a7d3d18ea05. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762062 — a six-check JSON result.
The Porthole of the Kelp / The Maids of Mitchelstown Reels
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3831b4abc5696ff782b1261d2ded6b6c535effecb0a5c9fa523c843e2a7534. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762067 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4002cdcbb160c965a8ceb9a5ddbc9ea18cb3150dc8f8cde11616e45374194e9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762071 — a six-check JSON result.
Dick Cosgrove's / Rolling in the Barrel Reels
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f7b0e14fef772ad8489a1f1790f596e628c65332c0ca23bc921bff7d82da34. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762080 — a six-check JSON result.
The Killavil Jig / Billy O'rourke Is the Buachaill Jigs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3bd3504e076842b9f11cd9a88ae34773cef1e9330e520aa159e5716688b779. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762084 — a six-check JSON result.
Scotch Mary / The Old Torn Petticoat I Got in Mullingar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a0bdb3f610fda9de78ba51a291e556e96eec3d69e85a5dc3c09d8dc49a20eb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762093 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1532e011f9ee3f0381223dd676ac89b788779eca5713aa2df3155557ba504e32. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762098 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b1ef096b3df26e5728f98b0be99655191649e82121925c1f8efcadaf0ce491. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762106 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3065f09727f15dfcf1e545b4e0ab7ce97f7dd360335bdefee88745f561b47510. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762116 — a six-check JSON result.
An Historic Recording Of Irish Traditional Music From County Clare & East Galway
Rolling In The Barrel / In The Tap Room / The Earl's Chair
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6cd1be9f449469eb8163245c2ef623e838979a5496b048d773b9033781d937. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555686 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bf47b9d412747dd04a959108906500482f71e6f2122adfc4c8d4243bd76f6c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555687 — a six-check JSON result.
Sean Ryan's Jig (The Castle) / Nightengale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb830ea7321694ce15261c8b5742c9c6eeb9b1a4bf11375805dc98542c6e883. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555688 — a six-check JSON result.
Egan's (The Humours Of Castlefinn) / Lafferty's (Glen of Aherlow)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213e47ce726af1d959a8abfe8333599f516d3ce2fc3f9d1b8f74d3e3419f8400. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555689 — a six-check JSON result.
Kitty Gone A-Milking / Music In The Glen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac09f14e8d10c58dedda755d38867601f573716f0d8aada39041bcf2116d8b2f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555690 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d68b8d876fecd72973f556e3d56889088dbc2345eba0ec6791c11ee12a69120. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555691 — a six-check JSON result.
The Morning Dew / Reavy's (The Hunter's House)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ffbfc52588563f053eb5a2b327a1c195dd039804c926abc14fb4a07053ec54. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555692 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755c62d561a652bb3773b4da04a00dfcbafd63f4842c44cd68d6daba340fbb19. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555693 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc6748ac4932fff31baa2d46a6451b8f6d0ed618f9266ff5929c6151681b382. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555694 — a six-check JSON result.
Dunphy's Hornpipe / Chief O'Neill's Favorite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7d5bffa34c0162287fb5b643f625e555945b3a3e4a2386145a8088c050f47a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555695 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd647040188a4c60cd9e3db9926904ec9a880890d19cf4fd30ca99a6091b6a889. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555696 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9257ddfc3d59dc576238537911338a0957f7c111c50f85d8bec0021ec0536185. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560555697 — a six-check JSON result.