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 0x2b0b1c26c0f7d1bb9f3c760ca56a207cb95be51a160adb353495ace90c947174. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae12fd45-0f65-4aa4-826b-0e78e060ae60.json and https://artists.proofprofile.net/proofs/artist/ae12fd45-0f65-4aa4-826b-0e78e060ae60.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 0xd3d6e8887b9aff8579b15af8912c2b44c72ce8657fa37bcf7e3c1f177a54c37d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEH742320418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e018dd03deb6eb69a9a08c682f3a3c4c74463a83260bf357487c3d4e832b6d4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEH742320419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a25af4f761f0198ed036b842ce4f4897659bc5f01dd4e70554395d65033c6e. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/DEH742320420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf78009931c2ff950b080088b5e866118e173380531745d5f33f04ba721d6f73. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEH742300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d0b61c73aaeba0167f2c11d608a8b9a13c5237c4347e89781304914df7ef7c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM8DG2225027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d9feb93456838a1de5b2093d5c1c35000e15b10ddb7cfa916c5877d0f9710c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QM8DG2225029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4965628b3a4feb691af0ff72f65e5bb3cf2f1def72693b37921792da2f7a8ed6. 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/DEAR42299614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5736c6a7608e8bbd41acc6bca4632108f7af412450821f7f8364e09a38a8ec. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42221509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3f63e7cab466fc199e5d7d638817a836f24364b558ce19f2c5374eddcc80e6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEAR42273016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a44d2a0273bb152338e9a30a10cab214c5ab6088a1839c763e9f7cf959eda03. 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/DEAR42214518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801d7d6ab0ed3f24567ea01345614218623607dafbcd0d881fedeb1677db83b9. 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/DECY52101489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d23983253967e477cc77b3d1538683a71473cec115d0b0e3489ad56a4bbfe2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DECY52101491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cae4675df73cf1ee8dc9f2d8a91174656ced250d2a8ae6e857fe19a67959da8. 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/DECY52101492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c289fcd14a4f350329a8748821b95a5d29c6e3e5f3c6c14e4da1ce631c94fd8. 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/UKACT2180041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2990d48df6523754aac2cfa2995500de12352b64bfc96f0eb3733905dbf8e0. 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/UKACT2180042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbceedb44c1aa130054291eb97bb26d2ad4b690912f9e0d96615eb2eeb5f85044. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKACT2180043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b973396024ea628ddc7012ade9d21fcfbf7ec295001db2697e6715aa855c02b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ITS252000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45627764d45995d2729b2e415e8a1c7f4e7795729c53ec2ef9aaa4a44b5dad65. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6N22039795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f9bab2830a57961f48c0bda95de2ce1e1ff2b0bee6bd3ee498e7c3de5fa780. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN3C1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9493da61222ad2e46b04467c3d06febd24897a986654fdf63192196a4c59f458. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITN3C1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51552f74e9c0c06a4d2b95fcc97ac44871e2fb360f915f53e83412cba8094915. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN3C1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c0760e79461d809b530bc3f79bbf89832effe76a174192e05685a3b0d50b27. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/UKACT1910753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83eb180ab006c479df5dfd20e1c7ccd6cabfe3fe9691721251005b59e36cf4f7. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKACT1910755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e2c8f290037b45a67637aea4d2d7b084c2dfa795e92d344047c055ae50c78f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLR341010334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce247f35b11c704291b10369fa4d429185bdff93b085058ba2ba218429e4f6d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM7281880345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97bc06c5eb2773fb60ded276a4c1bf3d9354d5f3f55fbb3b19d6397397abe75. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBKQU1891815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c3050c0f76380347f99e3b577e8faa0eec061d72a7dfcd957cf235dfc3eecd. 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/USNRS1836618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805c9f1dd2e2b4afbb611ce3d884af69a14a797921b128b5b41a950abd9ed16f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLV61706841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489b6c81b0596c59469e6bc03b00d5d7e8fc12799bc9736ac89278a75315c333. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741702118.