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 0x16e1d6a5194d55d7dee70c2ed9fc2a2828804b5fc2be4a4ca8aad5e194e65c51. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90145427-fa7a-464f-8221-bc5b239b02e4.json and https://artists.proofprofile.net/proofs/artist/90145427-fa7a-464f-8221-bc5b239b02e4.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Reels: Mc. McGuinness / The Ravelled Hank of Yarn
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 0x19184af2e9f73e9bd929984c4cb936c0bf477f955526a4f3b55f03ed73edbe25. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USHM81021415 — a six-check JSON result.
Jigs: The Kinnegad Slashers / Packie Duigan's (The Wandering Minstrel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a55ed90e2ab2cc2e231502dd4d47615faef70f23ea2501fb71154c8cb5c3108. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM81021416 — a six-check JSON result.
Barndances: The Chaffpool Post / Dances at Kinvara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1885bc9964711660212f6f8d54132da9d188f1819a5b6a6ea6fdc8a04434174a. 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/USHM81021417 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b56692e4a81baca4be5c345c523ddfed3d4e1139a81e11284943680cf70f20. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USHM81021418 — a six-check JSON result.
Jigs: Father Tom's Wager / Scattery Island
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bfa82d75a085f731b3b95df0a7c67bfd7702bf6218fb6410e3b468159eda2a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM81021419 — a six-check JSON result.
Reels: The Man of the House / The Blacksmith
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf09c5b9b25078fb44baf595899fcbe17f595009a6dfc716d67a9ea22907cd2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81021420 — a six-check JSON result.
Single Jigs: Chase Me Charlie / A Jig for Bernie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd173ba472a0a69de199dca656523058b03565d4ab46cc1984be92c28cd7cedf5. 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/USHM81021421 — a six-check JSON result.
Reels: Old Maude Miller's / Castle Kelly
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b32e9985a4beee8a38b69bb976dad74eee0f411ce31d175ae48812c791c52d4. 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/USHM81021422 — a six-check JSON result.
Slip Jigs: The Swaggering Jig / Fisherman's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818eb250ecf2db395d4cf542b2e4baebda8e233fcd8976c0ff778c10d42b317e. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/USHM81021423 — a six-check JSON result.
Reels: Martin Wynnes No. 4 / Miss Langfords
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd94cac1be9006afd4285d9173c6f5a1a675f51a6943a2e06f8fd136a1a3efc. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/USHM81021424 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239668fc30c78fe143811357ac35d7f008b93d689cb501254edaeac6174e552b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM81021425 — a six-check JSON result.
Slip Jigs: Na Ceannabhain Bhana / Tiny The Trooper
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922f5e219f7e9509a12ced5fdf678906df07d23869f8eb2390f3f755514c53d6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM81021426 — a six-check JSON result.
Reels: The Fair Haired Boy / The Fair at Ballydarreen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59328b35fbc517d0a030ad4b13dc3c0186cbcd093b171eb5afc576b639a5c494. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM81021427 — a six-check JSON result.
Jigs: Kitty Come Down to Limerick / Headwood Crossing / Ta an Coileach ag Fogairt an Lae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6334aa046ded00fcb6b332c8cfb3270197dbee857d9e525bb7c6dbe8504f9d. 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/USHM81021428 — a six-check JSON result.
Reels: Cramer's / Jack Coughlan's / New Line to Loughaun
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d2a4cfaab8d89479627775b1175f43b4dae791d47db65e73bf02808556a2e4. 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/USHM81021429 — a six-check JSON result.