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 0x0077ad83336e24fa2316f9c0dc50a951b2758b04714e5989fcd962a56f9fec27. 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/247e9bb3-84c0-4979-9ba5-956b0e9f3328.json and https://artists.proofprofile.net/proofs/artist/247e9bb3-84c0-4979-9ba5-956b0e9f3328.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 0x828104f333e1f17930bdb70e1d4fcc42f8dd1630e69054400f42f9bb8bd380b9. 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/DEPI82205839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a94fef5a0bfe172421fca4925d4786e2fd652ac35865a2d5d358e5a7c9ca63. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USHM21914456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b287792ce7f75a58e38ef3cb87fa984ee3208528d1238d10ec98500bc03f41. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPXF2120758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e5424912fa29fd02b0f9151ed63ee2bd1e2e22a2036ff9dc5b5ebbb9c6bcfe. 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/QZPXF2120753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe829c5c811a4d9bd30dcb4a8f2372eb447be2b998cd9108ffea6641d965307f5. 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/QZPXF2120757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3ba0e9d3515d97ab264bff276c650aa644064259397078880aaefcabe5b815. 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/QZPXF2120663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20602194c28e656b66e11ffb5f443c86ba8304c7313585ea745b53625f44e87f. 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/QZPXF2120662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3837c7d115d383ce9f213647e9f1114b706c22449aaccd4d7681ceb4ca5cbf4f. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZPXF2120264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617aa738d749bcb0807f44ae108a3c6cba0e66ab57461d5377997b1bf703863f. 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/QZPXF2120751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b0510bfc4a5ad3858945c46f1976fa3472e1c4f35b3841602924280ea80ea8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZPXF2120335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee7a40ce3397e08e220671d617472eef78f7c9fc7246cfc6af2d6a1f707e71b. 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/QZPXF2120815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc40d77ea4d3d8b35f876525df6370efec8abbd9a56f8edf3bc9693334b2dc9. 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/QZPXF2120819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508742f1d4c374c9e81098da7ea2d4c8f29bd0146fe6b21c4882e8f87f787e38. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZPXF2120821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa06117319363d9aedc0df070aaab20485804b7d2c53de17541b50be522b086b. 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/GX4R52172698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb2e22608e8cd589314da1cf730032ec674fc6a484e59419dc150e64582bd9a. 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/DEPI82201273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15435d8ebc8029fcb3b590af98b01f4c531dffd84d265f22f71fe8e90ed4169. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZN882156419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96c8fbe5e5971696c8b6218200972c65aa21a9f157b168b25f9ccd6b0f3c2f0. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEPI82204682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b621a57054401f248e50bc5a6a1d52ac955a9e99b73e034973f4660f694940e. 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/DEPI82208231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243a31dca0199ac856bc1ef5d2cde0ff33d4d32052848842e7cdb0db9275342d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZN882233441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6db26b48a847c222ddaeb03394a87f7883ae9259c32acf0d08e680f22935b88. 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/DEPI82221185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69721c196fce8ced33cd59b518f9d359238be5a7db372bd36993e7cd73717cdc. 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/DEPI82410351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c14efcfab98fc17d00658ea4408002afd5540c440cf610e5788a9840daedee. 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/USBMF2400320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d018396a03f1467ce4cb78f75977ae29f409b965c79556d14162f150326014. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USBMF2400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20bdc240ae64887b0bb3dc3e0c0ecf1833ef4a4187fa61763533f0be87b401b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT3EY2432459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7d922440c87c725872b70ea8dd5bf7b23594f1f71d7c138371ff39cd81a54b. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USBMF2400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fef9ccf264625748596f3b02877a4db6542b33340c63f0aca3992542b17914. 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/USBMF2531401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37521ea8c31abf02ec254ec34b58d07c47f5b56dd518a27043cc72d5fa7fe26. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USBMF2400313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6025906f34648aad6b121f3bc3080deb1cfe54273fb1e49cb31d0d41eecf427. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USBMF2531404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c14efcfab98fc17d00658ea4408002afd5540c440cf610e5788a9840daedee. 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/USBMF2400320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5948674d9214a8f255e4c7e0fe0398fcd7a389cd9881eab81846715efe5259. 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/USBMF2531405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51234f7b79603a0928230b0584cf1524551352698b78a14506bbf59b1ea62546. 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/USBMF2531406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6032012436d825b55366750af1dc9dab40ed14be7f70f5aa6600e56a90c286. 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/DEPI82512603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebd36506196fe487399fdf16c9b5fa17dda5143814bafc1cf832ff19587debb. 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/QZTAZ2213523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5452ce7e0b4879f7c1f114680d6adf87368e4c65083649c6a45fbe00737950. 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/DEPI82215122.