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 0x3f1bfd84782b4e6d02c5b13918b81f612aab843164d1603e6290011b4edef526. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e0535f0-0d9e-4e62-aeaa-185c07ce2b0f.json and https://artists.proofprofile.net/proofs/artist/4e0535f0-0d9e-4e62-aeaa-185c07ce2b0f.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 0x6ccc48a36865f2cffe92557a7b90eda56ae0255d46e5c1a862e553fcbec161d2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZAKB2341825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc54003c592fef5f22c01a6c3a816781c20ca0a83c884bc9252efb15f2fde16. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZAKB2312532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85fc19e6e3ab60206229990f9b99cd1c07b22aca457d08d06dde6bf139f4c28. 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/QZ5FA2050476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ae43f6a2bf7f322603a4117fd5e33a3bd89e34b253c34d13214127fad9af20. 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/QZMEM2404108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b4b03c5f491ec55db6f41e2b9e882d1ca11cc0af28986bc5d062500256a928. 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/QZMEM2404109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81488d2e2912932ab17512426293a07e733b8e92358d89fa8465e83a9723a5fe. 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/QZMEM2404110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cc9f03ccded5317ca94f5031e5a3927dbbc8fe39920a495a38b1e9772234b3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEM2404116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dff496dd73691502781500bd6ecbbf154f94f1c040777b727ca57095b19b9d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZMEM2404111.
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 0x8b8a68778d377fb4aa967c602fa4a67db9fc67c2b86f7dc268800b0e9832cd3b. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZMEM2404112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7366e699536e613ef454371d00868c8b53d3b2fabcabb94ac58dc20eb2be63f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZMEM2404113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b9e39848310e441ddf5fa0c84e32cef54b90bf3b9a815eac4c11eb757b83e5. 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/QZAKB2339829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e986802b32376a5e5573254987a19b691d48d04ac7c25ba8bbde222a10b7f. 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/QZAKB2339830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2524e72b342dab163b4b61a253ef37dd6c7630023f1e924664dcb631b2faacee. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZAKB2339833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d48b123dc8b50de57011088a41d761d4592e3661a779b90ca4413b55082a5cf. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZAKB2339827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc044ac1618c2c1828f374549fe0088ffe23ed4f77d4716cfc452e3a23efd771. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2339831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8883545f36a03d0063105842989dc0928eb9aafff71a38b8eae96724e58f6a32. 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/QZES62156537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ef46424a4187f2133bf60a1ac1a26b7c716ce9fae4f8dcba5e274765fed0b3. 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/USLD91753340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3fec89633294aa5e8fc443895cf05a10fa4b493de9331ec6324ae329efa2de. 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/QZAKB2334374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57922bada1fe873f40c79a02840b6cc8feea1ee9a40c5ae1bf49e665dcf4fac1. 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/QZAKB2322869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0f1dc554b48683fad8693843b6d81761fde103578977fa773cd088073ccde6. 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/USKO10901933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2872219471f68c1cefc5d0c81b8e37460f8d10629e8152ebe8225c65ef2dd80a. 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/USKO10900897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6e38970dcdf6d7e7d8870749e4dc00a9ff19e1b0dc7f1e9b91ec6495257da0. 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/AUGBT2424460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0e31da5c91470cc0c33d8dc1a4affeb3c1118e0fec9c02dc41ced7fe0870b4. 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/AUGBT2424464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489c7a0a04153936c4287cb9adb3f9cd3b56ea2a8fa2fe7f81973686031eaac4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUGBT2424468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbef9e794c3610a2d40772ed8f8162f3f491d661cf3f08b942266287137ba888. 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/AUGBT2424469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddf5ae5fca1e24fd9216418d1529aae1d24b1822424d4d1bd00ac4a95d20af8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/AUGBT2424471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00063a3b2c052bf289a642825cb48b33a301211ff4121f1c4c3a6b6b31cd264d. 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/AUGBT2424476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed770f10a083c595e27bbbd96e6d8b1728efcbba0a7643adaafee036aa726058. 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/AUGBT2424483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b85a617e29d8eba9d188c641c5a24bb2a1a14d6b983e97867d71bc21718f524. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/AUGBT2424467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1ce8310f4b3995060d887b638642112f9d71d481eb05584c3d717d7d2328b6. 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/USA2P2015361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cd12eb9e7b4aaac731aeff4f6da204c3bc19cb074d1d36917fbb9e62091d5c. 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/QZLBC2325178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881cab8183e08871887d2d804086d9e6f5a6e98870e35d5d29352470d70348be. 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/QZTAT2346748.