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 0x8da69cb2b244fa941a4f895effccb5a8351cab6b7e4f8a8137509c942a21f245. 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/e800a1b0-493d-444f-a3cd-4d4913d65bfd.json and https://artists.proofprofile.net/proofs/artist/e800a1b0-493d-444f-a3cd-4d4913d65bfd.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 0x31d13c56a1b39964ec8d5d87d5c6f5f6e7623bc56d41234ce25d47c25e8e6cbf. 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/EEHU32001442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dcdcfb60c76aac9f1f0c65c4495ec6cc65b3a591620bbda61da139fb1d3d4d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4TW2496652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf809bdf474fe802f781a8a98674b714f66a56fb3f0a8e43d7b97923b0b9de753. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GB8KE2404463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fa64dafbeb325b7a789683c789a76377b5ff91e8a1890329c1550c2ad9dae3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBKQU2429022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4760689f78a3b71582147cd2cd33224516f9df2e94e789e94d6c39137871a977. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBKQU2429023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b0cfbdcea2458252f35ece38a91da21ad7c44f583c5a281c04801d2750a3ba. 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/GBKQU2429024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88de8c24aeb4aa8708de1aded7794212b9dadc6063ce4c5984e94f643e1be335. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/EEHU32400843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d5f5a843570fc8c52468d48ba2ecb19ca2be7b799f2566634aef82562ebbca. 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/CA5KR2492386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3e86bd6434f0f3a6a7a01bc5986ee77767427a9e056ce5ad8e719225fca404. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CA5KR2492834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd043c68cc293ef2f1799768fd211dbdb974dd3e6a3cf6ab3b50c6e8038c92102. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CA5KR2501894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34f9ac5341f4264d000cd1222072e3e631e20a68cceab10f2c7a5005a01dd9f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CA5KR2502814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c976f6d6a0ebd28f2c16c09bd9e47c8fdee2357b851b22a6435a061982330b. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CA5KR2507121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f8ea04393f4a8de48c545d7887ed50bd891150616492cc718a9c88797eead1. 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/QMFMF2463118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4186b592145f322d3909dd9f2bf7eac5e2cfc918d8b9602d9a61f4e281eced. 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/CA5KR2512299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601bd2faf1a37ddfcc518d74d5b3656d70fde1880a97837f9305cba278dd032e. 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/QM4TW2570904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3bb5ebd772dc6a29cd44446d44b1834ffc569144bbadd3c3ec8815aef49e8c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QM4TW2570912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2210d5b36747a4f6a51e7017b79797320fc188469c4d8bdb59ed2c0ec27e91. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM4TX2521098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b6f31a2963c7a8542e1fb679dee277daee812b122e9db1d3b8e01820d6700b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CA5KR2517208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2243a57340c9566776e1e47295637c15ed805c4733d630bcb7eb1c63bab839da. 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/QM6MZ2519795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa36502a85751a4b59d8b6fd0b407718bbc131673fba293f966e504d29eeb03. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QM6MZ2515429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ae74b795604cd023c2ddcc77ee6e397c33dc4b1ef080ad5d25c8a56816b034. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QM6MZ2519847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e14db301287787f223c10ef5cb51bf88e1f75cf674bdd6c2963d12dcfa54ca2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6P42555194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3a5380f6a4166c6d4cebc9116df95d0203ac843288dae163a068a5b0afe467. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QMBZ92579251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb142c48fe617b3b76750cbfe999565b3794d6922b26fd3fce3b1fb75ef859708. 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/QMBZ92579320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80072facf8dd2e543a18600866753f469475b4f281c2f24c170bef1750450b2. 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/QM7282553747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa96a7b2d282f2194b091c2f2037e38786a2dd5ff2b2d7f15f4b295d11d78d34. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QMBZ92579321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1366edfb9e536afd155fa7123d8ba84847f0c60ae39890316cabf7a2decd63. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMBZ92579322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a0aa63042025ba4dc46286b8d97fd7bbaa808b70dea46536e7550f70f6306f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QMBZ92579323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910e2d99a3a00dd2ccfa8838d62b5075ddbaf2f2cc62f38a99093535569d4e32. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QMBZ92579324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c61e7950f22690422a4d2ca0b0ab61cd073447a41c102278003406ecfa994af. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMBZ92579253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf04b5d80bc23df2c19bcc7b43069b5f0eeffdca727ae03bfa07c207e79b9dd7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QMDA72575219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d10ef9e88e9e70dc304e61edc855303b28d876c939b038746235328c1c08d5. 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/QMDA72575220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb0d99c8092d136a1c4bcf954fb4bdbe93559c10bb0cf389fc2c03f23511a30. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2586896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32be1ffa17cbbedad86710e1803c2ce41f848d6e28c5be8cfc7f153587e5a228. 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/QMDA72593627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b877b8ceb9afb6cd59ded38e7b60acacf24ec19fa42ab4a06665f1da5e7c41. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/CA5KR2597222.