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 0x3d9ddd9c13d37be8fb0393a358ddc9ed57f332ae73aa0cbb219899d61e5dd047. 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/8a00f5b2-d2f6-4788-a4f3-96668f4d0099.json and https://artists.proofprofile.net/proofs/artist/8a00f5b2-d2f6-4788-a4f3-96668f4d0099.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 0x5082da6a98305ce234e2833d6d55bd1dbd57391ff9646b35430f94f3403da55e. 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/QZ4JJ1915254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2ea44ce5ecbfc2aa8ad0e74c80a53f327d1a597df647b27d19a277b04e2668. 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/QZ4JJ1915257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e71729fd584137a5f0212ed6756c748c9a05dacbd078a607f9b0e761ee1805. 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/QZ4JJ1915261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d4937e441029494841f41e238de047573dc95a19568439f9bd85e91427e561. 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/QZ4JJ1915262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b1644898711b748ad3bc0b0fee80dc949237ae5fa94f122ba2853246256129. 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/QZ4JJ1915264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f6bcc117c2a84a404ed0ad28812d99f27d704e7b462410717a166e96034d61. 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/QZ4JJ1915265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a0350a3564b14e4d3c1e22ac92527ce1f0fecd9dd6a9b64e743bf7a9c77e2c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZ4JJ1915255.
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 0x77b0b90f36f25463b2ca97d4629413e795501d3389375b07da65f6860eee8aad. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZ4JJ1915256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa824a11c4a0d47210e191b9b731d0f34fa48eb16498a40e757748b46fa81dc14. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ4JJ1915258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c857cbe6524b0fba4b19bab8b4f7faf4928c1d5badc024a9cd6f97d056112a. 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/QZ4JJ1915259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b503397fdcf5429bb6d5e4428f73c6279aaf10ae730a1b6207fee1034c6a2da. 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/QZ4JJ1915260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0f3982fec7dafd1e8d8217ffc7e73c4ce6194cde3f488fa37cbd531a573e95. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZ4JJ1915263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545b68587676e78550acf56c48ae1d5b09b8e29095b44f26fad0f0f5fe288a38. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZ4JJ1915267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b66dee75cfba9a2bff0f39aa35ca6f4793d701e130fb26fc8cc592e36b4adef. 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/QZ4JJ1915268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c31a4cebc525b82abc5aff46effff5837675b268a4651b62c0946c464d93cb9. 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/TCACC1493890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c59fc91902ff2361b1796b57009a56cb89a9a56cc3412038accb48ce40bfeda. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:54:09Z), 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/TCACC1493891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7838fb487c622d5efba53398d52d74285337de23eede1e034149d30191cb12c8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:05:33Z), 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/TCACC1493894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f61da88df94334676683c8616d7fa5c3ca65ad40f58aecbdb6056155a5d36c. 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/TCACC1493903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd855c2ad359c49ad7be22df7ac142a6a558497154dce1fe1feb3276d479a1f41. 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/QMPKX1782401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a5a4d227a2bfa7bbe8243865fb3ace02e1bef6ff000cf275ff15b17704898e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:18:42Z), 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/QMPKX1782402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bce64448ccd4d41b4061a6bc5f82432852cd4052ba46dae202e240934562745. 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/QMPKX1782403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe7e54e7c7b4ae06de1bba1acaca682608f2e9660bc160d74241e02b80e2abd. 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/QMPKX1782404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bbfc124e1c2124ceadde44d1d6eee2b4df0c0ea3877989cc438988061b457b. 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/QZNWS2147020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42c53d6359b5dbfb6c6b61fb4167baa4ffab9d0bab95ef8ae0e76cb6798e5d5. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZNWS2150686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4407ed9773aa6cc1e5545b55eac004f2e11a2ced65417a80a99ef6fbb3eb4e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:15Z), 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/QZNWS2146313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea92a9041a6ff49d66d0e3bca0d9c7c46cd1104b7f210e28caf3542001a13168. 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/QZNWS2150687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bbfc124e1c2124ceadde44d1d6eee2b4df0c0ea3877989cc438988061b457b. 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/QZNWS2147020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e72c933f59018cb2b327b139672970e277e9118ba9237789fd06dea2032e6a6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES72569259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09d2e5880a16918128b0986dda92796093a6b2148b25269b8a29226cc95cf4f. 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/QZES72569261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e94d090d1247174f33c8ef969e91eee4c47dc614cb276c882033aa35d64e9af. 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/QZES72569263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c0c9e7f6a663347bb225e834f3cfe98047c4a625fa8b443da0659c09c9f832. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES72569264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f8bf08485bceb49faa250e7f855a7b8455e231e32b9a172b734496345fa7fe. 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/QZES72569265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4fe2c4a0c32c9f6657684bb1a8cc7c0386372cb27e388d4738c290fa44cf87. 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/QZES72569266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d84047b70d4da62b7d27db7221753ec0139fa43cd4d87bbec5c9fee2dda74f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES72569267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7ba7ee7caa314ace9ca1aa940af204f2dfd4834a3513465360c84e9af4eb48. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES72569268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902fec512751d591db3cd8bdb9a1261867d10b3a7d2f029995da10f701458701. 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/QZES72569269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c38675f7782837750cc65e55e1d33a7a2e0b8d16c7b535ceb4b3922bda8277. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES72569270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2b9bf3f4470e2df89bd2bf9b0f8c1ea327bbf0da8305eaaaa7f4253cd6073e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:43Z), 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/QZES72569271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e554f55d83358384ffdcb80792c897527d38471fcf5ce719ec7ff218ae1306. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES72569272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163a5bdbb3c7b8fa1891212f69a55d998aa2a636f23a89b3aba35d2d6d009a98. 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/QZES72569273.