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 0x54ea176bc61ac1373c71a75157cb7c75b09bd3c886a5306274fb86a7245b5dbf. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56033d30-d394-4ca6-b705-35d4c43dbdbb.json and https://artists.proofprofile.net/proofs/artist/56033d30-d394-4ca6-b705-35d4c43dbdbb.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 0x3760f79278ed6d20f4d8b33c07d8b2277c553fc2a1fdd331ff1d9725dfb6cf62. 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/CA5KR2061709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38c089f7b58c503554438f3fad104c02971f615a878b4de10074e074a1bc6b5. 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/GBKQU2063545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf012722af819611e6c78c628edccbc49ac08a2a07f393733fd9c98c26ac48ec4. 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/GBKQU2003367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccb2e9f92aa16285726be02362e6ee254b877f20d8e5ed20936bb68262d66a6. 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/GBKQU2053696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bd69d222f4c4f65b8365b2c4b494a20befcf1cce7a833ad9d0a3b65ab816f7. 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/GBKQU2053697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec647ec488407d814beb5d9213d1890d9767150c791182e302a52bb208650c9. 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/GBKQU2053698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc79b2cb0b1ee281bb19fcb8f84d4aca11ef1cf2a42509f87196b0e4962c966. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBKQU2053700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef81c1876ff240ba3abde0672a748e4ca4dea805a433f7a69d9db6d64ab041b3. 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/GBKQU2053701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9584ab5c6505c8b83b34f0a26bbc3f15d884b1275ff9b5e6ac8e1eef5a60eb6e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKQU2053704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6e5ee73d6385123bc56664fbbd6a26eb87e7e9a79f06ad99b3d65b4f269e94. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBKQU2053706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5f1e24ae187c8206455d77abe344b3ac6453fa6ea9c3c58b889b36c471fae5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKQU2053707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562f2e0b7ab4a90ce7a2202f344993200bc6097c277a07c3a5821c159c85e298. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBKQU2053708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105f76a5d8d241d90441082cbbda101bba839a15617fc87b94a26fe887dfb6b4. 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/GBKQU2053709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5582eff1fdc7a22178e3040643d9465e95a2bdd24a9fa21b523f0cf16c911ac8. 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/GBKQU2053710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89256adb17f7b61f4a01b98e9dd4dc148a4efbd1041767cc2d09e6b8d3de1d00. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBKQU2053712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15566629883cf6442492bab490aa00f6eca2bfd9c4f708aae1beaad4f011d22d. 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/GBKQU2053714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b116b1fded755406291708d2693a87cc5a3f5e8549bbfca360fd120afedaa9. 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/CA5KR2118145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac5bbc776f607e831042527babda5620e5924b5f6bed73abd2d3933da2f10e9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CA5KR2118146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f238103d656b954c35f80052de640096ae27d41addb8b6bfcfc0da4d4c150. 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/CA5KR2118151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0449d7adb7d9a76c8824fc3913c862063d1f37b2ce3f7104b1656727822a851e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/CA5KR2118150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fda692447200d39b681e0cec518f9efba2174af1f8829711f0653254b2b21c. 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/CA5KR2118156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2537b7254caa97f854c1aef254b9997ee2b259964dc6cc3054bf6fa0617d495. 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/CA5KR2118166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96ac00e088afdd56be0a08d688f87d065389337bd3accbf8ec0f1f5301db746. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/GBKQU2111010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410158a631c3c72a32bacc6040b01d3b2123b8b59b75696590a06e9599f93031. 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/GBKQU2111012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e9952904fcbb83bbc10f618fcd27b42cede5c20f537dc0be577253c38594f2. 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/GBKQU2111016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43da5bf9b68b202de50344bebf5cf70fabf666f031ed9cb73fa369b705c08035. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKQU2111017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f98559d4ac7744299ab50016a6bc9eca9e1f16880a3fc8822dbe67b0aa7836. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBKQU2111018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f4aaa49bb9cd43cb867748c31275d1201e95a55a680902ad64ee2be420443c. 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/GBKQU2111019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e00a6f210cb03c65afe0b22103f84a1c49605628bce25e84cda966b4954591. 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/GBLV62039511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f084cc389ca9115130924cdf8fc91af116c1e2b3f45f1b28cf48e2e6577ac3. 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/GBLV62039512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cde188dfef4e3ec3f72b8b1dc88793895c1cd6abc8ec7b7a1e6ae7688df7a9a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CA5KR2148115.