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 0x01a08e8100e383ff4b1128cb46a4d251fd5813f2cd7df9cfc8565ebb0f40b77f. 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/2936947c-f054-4e9d-9f4e-ca1e767ae314.json and https://artists.proofprofile.net/proofs/artist/2936947c-f054-4e9d-9f4e-ca1e767ae314.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 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 0x0cbfeaf68291c5986648a4a1d3c67533ffd86afaea8065f6b27a329341a2438b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11951534.
Jazz Cat Louis Kids Music (Piano Jazz Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4faa41196c0c1f542b30ac887146fbc704764fc17db86d39128b34f470802d. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/NLGM11941031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2fd3d9bee8019e95e8cfd63c609e4d9998b015dab7f8e5f444d9ebe6ad3d5f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLGM11941032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f60df76612fcc9fd798a82e20d1a3ff1743c172ec50cb99fc862ff86cde7161. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11941034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61540f1326b4d79bdf37e8e932a7da0c8ce8c534f29cec74b7545c7d6841318f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/NLGM11941035.
Mary Had A Little Lamb - Trompet Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4d3587ee1cacea14dd9fc13c2bc8142ddba8d23bda8f2482ff5ac9599e53c6. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/NLGM11941037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5790323daef382599d9890340417b1fd7248a3da62987f3cb84bde9d4c4fd9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLGM11941038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b667bed85790c11d63c1e1868e73ca11bf2f4ded5c50b1bc7a395a6b117ab2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NLGM11941040.
If You're Happy And You Know It - Trompet Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03b4337f3dd431d6638ff689c486dfb025677a627ae799a7fe032e8c06688c5. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/NLGM11941041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e837ab455020996d8e52e1b825bbdfccc34874040085ca0cd6fe6045e44c2b3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLGM11941042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e17ea3fd77301d9853eef2a43c1d4d1068952db39c3ae5acbe2b23ce0d96c7a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:59:58Z), 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/NLGM11941044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b0db3f34ea6ceb2ef472e55adfc6599e3dec7c76d7e5437603e0b89dc34a17. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLGM11941045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2966dd55f5a0a53ac0d7972d075421677dd26e8341014da9d43d848896ca3e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:08:22Z), 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/NLGM11941578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a436c43315d392578e40a34b5e08f58eedf15f1db751ba98912a86537ac1e8a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:48:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11951501.
If You're Happy And You Know It Clap Your Hands - Jazz Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf841ea855415389833e3f78a01291f540788c3ea45586c038cd7dd9407597f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11951502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287b762cf540ad697483e635b36b7a3dbb0029350d287e0dba2d614bfc55436c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLGM11951504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7c51857b61b55188b1bb91917625e4f15b790e7d4ec6a314fb974aaf6ca2f1. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/NLGM11951506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e06fa4750b7532429cdafe9770c3cbf7e54b7d051ed8602f627b9fb49dd27c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/NLGM11951509.