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 0x4fed073dcfecd51cf35a0076284280a52b64f744f1d006ced101509843f8e3e2. 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/8426befa-b401-4881-a310-298da51aa4d1.json and https://artists.proofprofile.net/proofs/artist/8426befa-b401-4881-a310-298da51aa4d1.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 0xe45668de7cf7739bff605c2ca1ece3ac52148dfc183f5758726e0a4e7ce54bcd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2317339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf005c4c7d6d7bd5c98ced68e276c2f898d6164c00a888eec90cea5fea9909345. 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/CA5KR2296037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121360058d98718f9127e7c78c7a70d3154e800ed80b70256599284b0174b3de. 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/CA5KR2188103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ddc46c1a93558ffd554832ffa12191aa58e5ffeaefb5748b4648659efd8bff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2317340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b839741819063e20358d211c43974a086495d84928999adb2d96a1e9d758fea. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2152705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a53f57eedb16033248a07d9e7f366a0d6db2183d3f079c33dc87711976dd76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2317341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2806c12731e5e710078f8c3f230f6324157566ec0e0aab2d0712f5264d66a289. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2317342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf005c4c7d6d7bd5c98ced68e276c2f898d6164c00a888eec90cea5fea9909345. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2296037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1735f31c2e14226113cd81b9289df3be808ee7f27c7a4565ee4f250bc7494701. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TLVEM2434649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2c219e2451ff45c4ac07311ac2d87bded99ec14a2aa6d3ecaf6598259e2567. 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/QZPEW2418332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed3df49632ed7044d94b270f94f85b3696ed4d45350eb3bcf9c954d7f54ff33. 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/QZFZ52101698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174fb641dc9e73ea18ef58395ce980c3acbe116d17e2b073d8eaad1c71034fd8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2055618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1be97475f1f2adcca6cbe7aae15b224cf093d5e4089ebd3b0fa49f71e7c76ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2011183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5c56e2f5502578d11022db5170e5e9e8c79582f0ee780d8dc8175b04c62700. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYW1911971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde15fcacb0b48c92248ab207913c42518d77248baa6016ae334a87ce450b5454. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES81909940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde416cd178927e2892751ebb1fbfcd5c23f0e79d919e636c42b3f352fa022ee. 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/CA5KR2178198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714822362beffff2264698c2b4a544a06a2dc033c21612c4fab1dff39ec08967. 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/CA5KR2178199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb98fe0b513b5e74971bcbd07be7c2182f9cf2b25706841cc9e671c3f27bc2f. 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/CA5KR2178202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbef722e7e1126e7434ceb453dd75344c4387fcd9110b138efc5a24a08465ee7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2023486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9a80a269293b369ad850f0302404f2591753fd12969fed7888bf48dbe8157f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2136757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0b528ff6edfa8f1e9d0cbdcf7a4a582f90d32db23e2b4a33d0a71ee952d5f5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2178203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4daae872b254dc634f0fa33f3ed54a0b906a4aed0c5a9734fbae8e24d25d92c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHH2323158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd493346953221c63b7ef86c23a530be6126ef13a2853b8a4dd4f4a244604ada2. 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/USWQW1900462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3115273afe3b3559ca4861db94218ab007db4372d070c46f706b4484aecbb4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWQW1900463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907162c3043c9bac42687d22127f789d8847ab3beaedb46501b5f21060290953. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USWQW1900464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4269909ec000e163ac994e83633c196381c465d2308ab7d655837503a6cdc8af. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:07:37Z), 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/USWQW1900465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e4916b287f58c02c1d239a7b8fc23cffc8776bbcd2d80c6d109b5023a26329. 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/USWQW1900467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6396d27be6475cd77ecb0d8ea635d1ecad17be02bb19f482ed5c4b71d8c277ec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL2148654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cd0a548093e4f40534b3d070a47498e3abdf6ba18ae709bd50e9f34650d950. 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/GBKPL2013834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732953a9c358e00cb6245050d15b007d7bbdb42129b0e5880e26f83818688018. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKPL2148652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01166962f2033847f308b8c85557a46ab7614ab6e3f21d83f1368715a2fa5ffe. 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/GBKPL2148653.