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 0x06c93cecfebe8c2238090e4d84a9fb5c731403fdd6d24f1a1945c78d542439e6. 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/2e1b6f0e-b8c2-42b1-8d60-638086fe9048.json and https://artists.proofprofile.net/proofs/artist/2e1b6f0e-b8c2-42b1-8d60-638086fe9048.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 0x64fe93f66044abebc4db3f304c81417504065c916f9fa3d479b4a9e73dae532e. 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/QMFMF2215317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b2cdfcf65af0f9bdc2d20811a34523255d010180d6670a0b10e488035385e0. 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/QMFMF2215318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae7a69525949b1510a63e6894317b41601b30e955e26176685b138bfde2ddbf. 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/QMFMF2215319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06104d53b99f6c01772ddabd06d82bae1a31ad7ba4294eb2cc6e5d67a9af80c. 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/TCAHX2490313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b9973d3e132f631f88cdf020d82c6fe067c7b78933d79521bf0c99993e3a30. 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/TCAHX2490315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927c8fdaf5a1d3ea580af8062a1afb1c4ce2b48804458b991d7a95f1fa666b8f. 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/TCAHX2490317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4427051946e2beda71a9519d7a498c59dd493c358f1d9f18e0c536fc080d7174. 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/TCAHX2490319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf458097d6b065c66215abe650488b2d46656b9dc7807045b1e0d98cc17121974. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:46Z), 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/TCAHX2491177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6297f9030b71746b35898ac8bd5521d5a2457be034c7e792bea3ec8e5e861b5. 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/TCAGR2264543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867db0d62c3df86e239638337f4c7044db18a1c2f3e6d58422e31830894291d1. 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/TCAGR2264564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed13649f91657dd0a37dd3cec5d4333f4e5f610779299c0fe6078fd64ca13428. 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/TCAEZ2083799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2b4642dee32d13b8d8ae7b74fad08f1b9738a2031cbde0033ad2f4207da826. 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/TCAEU2072575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a53710e0668f7b127f582752dd723935d0e3fa9e17c352f84aa54764f5d11f9. 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/TCAEE1929327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131948f148911f5d27441f06951255b8c9f7688736bf8f419c50e0e70c3484f2. 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/TCAEE1929331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d34c8fa735b56f69ae91a06beb488a2662c7cdb9b5a75ed47fd72ed6cf9250. 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/TCAEE1929366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bf205c1e42c12798674eebb3e8ed70b1e980889ac7927ead97ae6dcec83d70. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAEE1929372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ff4eae2e6f0704a5f395e0ca98c23d880817245c5414aa55c0acec1f4adb4b. 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/TCAEE1929375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27ff958e44b8323db01846d8927586e9ffdc6ba26ca3ecf2e6bb59887bdd25e. 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/QMDA62166679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11e9aba9b8c6d3f00f9ab1db2d9a737d7c96e843618a12191a2201e56f2d204. 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/QMDA62166680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc05d965c170270d106719aecaaa3f81e4bcbe3c04ebd1f66cc758d4192c2672. 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/QMDA62166681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a1ac48483591ee6d299923abc4f6f2d7842f9a34021f120be8a385ecdaf6ab. 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/QMDA62166682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196aadeb79c93bb44d8e71a3d5738b31554b0de82188988fb501ff339a002e3b. 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/QMDA62166684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6933c7c93ccddaac5ff4cd4f485deb3fd44182d033ba12bfe79b57b5309aaeaf. 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/QM6P42023909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753ccd8889c987ad1ac105b808adeebcba5163457a545abdbcf368d77a61c8bb. 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/QZFZ72475098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02dc8b93aae4e97ae4e3b4d726221ed853bd060c2647c2b84f8bad2c554dce7. 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/QM24S2500181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99199065375b3f91f79c3487765fcbbcf27bbbf93cc41fd1b5fb07d43b4d224e. 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/QM24S2500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb99ef6775406707e4638a40f1408413925efd190d623cebb070ced1f6cfa8b. 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/QM24S2500179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a18a4ce91aa6f6aa6b1de54c3959ff48915023612c59e07983fb8987a3fa53. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM24S2500178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb2e4ace7fbd0f07f1d9f6a794adbb373ee57617280cc86c30bc9f8749525a5. 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/QM24S2500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2550e727885733e3b97b377095c738dc7b8871e8faa0bf25746eb47e79ea941e. 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/QM24S2500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0beb0fac66d64b404d55b45dcef0a10bdc48103b69dfaa3cbe90ba35042e99. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:52:03Z), 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/QM24S2500175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa067376eef2122ba9a094113bc3c898dc10df88db04e2b5d333047897eee604f. 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/QM24S2500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1156fa138c6c6dd2b99ff7d1991a1d26c066e88f1119be415805bcc288cbac37. 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/QM24S2500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e14e06a8a12159e3ac3fc3f383e143d7a7edb04227161f086aa02085a804937. 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/QM24S2500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3fb9fb5792cd1b5de01218b32bb2c4ff04799c40b7ba73ddbf19c2dceef050. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:19:40Z), 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/QM24S2500166.