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 0x77f2db6dbe3acdd62072d3f8542e32d2a109b48e2676a851643ec5a81ceb6b2b. 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/ca112f1d-e2fe-4b43-95f5-65c7885a121b.json and https://artists.proofprofile.net/proofs/artist/ca112f1d-e2fe-4b43-95f5-65c7885a121b.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 0xf8331e70273eedf8ead3fc8a9e2c69789d2ea897638dc5187106e40b24a4eaba. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN42027938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2439ad9060b482fad38f1c62599507a46453974d72fe7308450e6abe2eb493bb. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:56:32Z), 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/QZHN42027940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ed6678a81fa4b5dccd19a0bd9c9d8d689c68783d596a376c720ed6463d07fe. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZHN42027941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2432940f6b33273518b8e2e7bf7a3b0ffde5c6c0a467e1f5fe4728a4fe104bd7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN42027942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24902ee42b4e9fae2fdafe0e71ae02678ec3c2431c0c13dd220ce6817d6ac74b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZHN42027943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad16d9a074e3f2d47677888010164e80351ebc1141079d724d3a260e3d49876. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:00:42Z), 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/ES71G2047381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5bb491a49f6466ac9649bf9351b9f68750b77c9c021601a87dc8619d442fa2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:33:59Z), 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/ES71G2059156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578983aaca75b6f7c556ea1c51a3560520f35706b57c5a3d3b9ab3719a25ee79. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZFZ32193889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cff506b4625f6a8336b9c19b6f6b3f08a206c0bd741e056fdfaf709044ecf4d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZMEM2109432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c2ed30507eeacb5ca865875b5096c101433cc3333634f76cb6b773a823e711. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZMEM2109436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54f85748d19a3f4cf4f6dec0b1bde7728542c1f540c265e65530136b1cbef94. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEM2109437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326b197d558945f55130734724d48536ec290f9a21b85bb791a68fbbeb7c79ba. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEM2109438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d69bfdca81ea6a6e2be41472823d4c924ce4b880bb5561da4569606bee23e9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEM2109441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cbe3f0e714e576df748ad480e025b1fe83b4d50e11ae42407c57a3874ee23e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6Q2381227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674b71dff231a305f60ee9f8264fbda649500dd90d72d54a5db416f682de2caf. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZK6Q2381228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9236e8457b128e4df5e481a2e28ddd42eebdc646572b9010f8f99acc902d27de. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6Q2381229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac5dc94f749134278b46ac933576d9e7bfe28b7acb309a69094762032d9f493. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB52431257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566ebeafa133425a9ab1397e113e0bf218fa3b09fac13fb57d9e58978698175e. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:01:57Z), 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/QZTB52431258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134c71002823326e6b64a36a33fb93205c39787ca4f5b44d9dc810c6ce561d9e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:51:56Z), 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/QZWFG2469699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae0b9efc9183cb79fa01d921a9f42cb9b680ae708be96dae0bc5492505fde01. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QT3EX2422667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5059fd3a432714e879d31a0cac509e3bde8dab459258285638714c15b17d70f4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ32597327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847db51b413236496d3c6f5d899fa814fc379ca68b7ed4181a173f0bb1e43f8a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ32597328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987b59543eb286ed895a480327f5e54cc46969c7312817dfd56ce4c31ec36a23. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ32597330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b22d7d4eb923e268a6583ce7f0a8fc14e36afe8c4986df7b6154e5273c7472. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32597331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe5cbbb599d258569824c37d32c908531b7005643f0798d386d4f4be73d08b2. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFZ32597332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc89a4c7ce48fcd2f52b11aac0b91b419187be06e31739e464d329cd8708ae96. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFZ32597333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ec3973370f69d740b585fb6e977429b43ed6becfd56512f8ea2652605d1d24. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZFZ32597334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a344c56b07254faa4ce899ea726673cfc476d13df51dff597384f25dd77ab0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ62558569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f53863e5530c02a12639bf03ce9481217d0b456b64e0b1172294646b6138899. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFZ62558570.