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 0x0a35ef6ed008f92b900994dd964bec28adaf124301ba778510f6d83d70c2eea7. 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/aa11ca31-6909-4855-bdb9-a2a1237f1b33.json and https://artists.proofprofile.net/proofs/artist/aa11ca31-6909-4855-bdb9-a2a1237f1b33.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 0x3f3b1278f30921860f33643c1acd8052b3c7ae17226f4bbd5c6607735cb7181e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/RUA1H1817502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd275dcaf55682142b94c92153f27afc8a8bfb70dcbfe3ec99b6717ced0a9710e. 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/RUA1H1817503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaf853db63d3a9eefb0d311940be39b67100c6d3d5220f0ef10ab3c9d09f5aa. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/RUA1H1817506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe813b94cbf1f410af1786d96b476e74f1b8969afd217d14577735ec132436cd7. 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/RUA1H1817509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b03ac3a419439775cda580045df8ede4e70e4698dd941a2c7fed47e76c341fb. 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/RUA1H1817511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ee51e91260268b7e505f5b86ca72c3518a2f66b3cf8f1675edda9ef67e631e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA1H1817512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fd27e3b40046e69414da20b4ee84428a670b8f19615d0dd6480acbbc6c4e42. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUA1H1817513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341c4ef8e918ad5b8f7417105a34da56b940b5bc53412ce98d97dbcb98c25f39. 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/RUA1H1817514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe967fe6b8f524a66d0b10effe7a4778c1c0d8a6f28a9f0d8e04edbcd4b31b1. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/RUA1H1817516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e2bc9f34cf1fe3cb666ffdd1eb97a35e6e515729d35743bf914fefbca3de88. 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/RUA1H1817517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997d2c2a7445517ef3f0011210fcdaca370b80c47fe453ab488087eed985a9bf. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUA1H1817519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46e97bc0072d4a6107adeae5225555d10f61e8aa0f30c89d58aab7e01f97679. 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/RUA1H1817520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594ba9c8d8b64ce3ac22d07513eed51b63f9287bf638b7dbf9924760fd70f1f5. 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/RUA1H1817521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236b2b44a5033418f73aa13090f3dccb9bbdcc8340b1a257566802bcad8d1352. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/AEA0D1910185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e144c6b1fa7332f8a643fa7de8f21ba14d78c2ab805fc12d9a7f03cf116564f. 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/AEA0D1910187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27796653a71cd100dc8d097c2135b25d591d0dd1395ae08f7d40fe8e323ab635. 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/AEA0D1910188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c9b62418fed8a855b823aee911b982d98ca4be14b9f9ffff6c1991b214f639. 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/AEA0D1910189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875c7aedec2ae21c5a836ad88fd85b7da81e06e131bf393b5354c26e8d3b23ce. 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/AEA0D1910192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6320c7596a7f7f8a9c6bef6a8e4269ccb82d7bb63a2aca915562a6da37bd2628. 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/AEA0D1910193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d876b078af9f5ca373f52fd3ce4f97ef32e8664e4078e20ac9541e53b5fa297. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AEA0D1910194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7198add30f2503b10b9e0cbafb0194396b86c7af90b98db81500c8937acb4d. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/AEA0D1910197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa497020af84ac88fb7237ae594ab5002464892b164bc30370520c98c8055587f. 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/AEA0D1910199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d2045f8d72d5c97b68dac53fd2eb2d91ea8db092ce30fcf4413a32bb8116a2. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/AEA0D1910200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253fd39a4c9725828649e3cd2effd6ad8886246781ad00ddef8b0e1c042d8450. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA0D1910201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c3fd39d92a7c248afc9ad881283d871270f238e8ee0ed1bb07f0a87363ef40. 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/AEA0D1910202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293fd565651ac35f97a5f3862ba2dca66dc436a5c7196e002587ff2a4cc75a0b. 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/AEA0D1910203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b14bb38d99f269033a76426977ad1a666be09a6dc03c52a159443af3b37a12. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/AEA0D1899368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd0d7482a889dfac1c86ffa1f32142cbc6f7c0f90a5d52adaa44c3e9c7d0554. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/AEA0D1899369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98484908526e84da0600c7c72956248796b9f51c24b498dcb63ac130a6e6d6f1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AEA0D1899370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cafc901728804afc6399c0def018c636b9b69bc05fe8df7cba898e374f8374c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/AEA0D1899372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3a38554fcc1047af62c86aff7fe8fee85bf1b87061b70c8886a7ff96404382. 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/AEA0D1899376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182f298bbecf1c8b1462adf184fb30c77b9340684ca35db9e1a1dc28057af79f. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/AEA0D1899377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee3326b2fee4cb848d9a850143a43fe460b8be74f19851a5f93be0281e28991. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/AEA0D1899378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf027b42db1f2c6f6fc64f5445f7140cb867c5dd9fbc42a20a6f00e34017122f0. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/AEA0D1899383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7be47eea1263e183a65279cfa449275f92bb2d9cb143a4be072934ffaab287. 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/AEA0D1899384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338fc1059d07a0e3150f22133d27004b9559a2f0b66394f6f902ef37833a3bd0. 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/AEA0D1899385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b637bcaaa5d06b5146d86c976a9890faaa4a6a8fe7f81324f8dbd029271591. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/AEA0D1899388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfb4be5da5f22b6f99b4a35f43e5917a40866277d6db08589c1205cfab3c40d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA0D1917357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe152f5a122fc2c8969f82450fe9ce6d1355dbb48bb6bfaaf0af4ca500ffe11. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/AEA0D1917358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae69d04eea27899f81fac451c4f5e2153eefe790b9ce33414677fd58fff197a. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/AEA0D1917359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeff6b8065ac4d4acc5c839762d1af93da3aa4ea4bbd1baaa481ee5f73480fc4. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/AEA0D1917364.