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 0xc21a122488d7a8a6c0963384c1484fda3817fdd6d3a15bb99f8ead008d1321b0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cee2a6a-7a3c-4194-9bc6-0d7513b8a2c8.json and https://artists.proofprofile.net/proofs/artist/3cee2a6a-7a3c-4194-9bc6-0d7513b8a2c8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xa41e1dc917f1f004a44d3bbbe32bd4f99ae8a1b9a2ee0e09424710a95b3b0e28. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1761978.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762034.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762042.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762056.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762061.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762062.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4002cdcbb160c965a8ceb9a5ddbc9ea18cb3150dc8f8cde11616e45374194e9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCACX1762071.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762080.
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 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762084.
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 956351 (2026-07-02T11:38:34Z), 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/TCACX1762093.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3065f09727f15dfcf1e545b4e0ab7ce97f7dd360335bdefee88745f561b47510. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCACX1762116.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACX1762098.
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
O'Neill's Cavalry March (feat. Martin Hayes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b07167476c8dff37223728722e0dd3536a1d7c9e99c7a58a057e7841ffd6923. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQX91503143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55bf4e00f8d031ebda0d4962fa2b6ef77bbb89356308311daf49f3805a5fe43. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMXZD1100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcf54150c88658545def925dfb7a6c5ed2cfc2e6e233896fc80d9441eaa9ad6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IEAQY0800029.
Tell Her I Am / Gallagher's Frolics - Live
The Cambridge Folk Festival 2010 / 11 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3254f33c18c180869679deaa6f7b669d59ad70a2905a5e3a93f1028c057011. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7VZ1300090.