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 0x338c364fbc78bbd4fd230f040a97f59edc2aa180822559cb1170fbb5f226ce7f. 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/bae70a1c-1bc6-41ae-823b-98edea794fa8.json and https://artists.proofprofile.net/proofs/artist/bae70a1c-1bc6-41ae-823b-98edea794fa8.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 0x509cb2e5357731e76fb823c2a115075eee7f59e7572007184cd0de9c329881ed. 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/NOHLX2237010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5957743f8d1159a762a6299dcfd83f51f87f8c13c04bc85a7e2de9ac1eb8a2. 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/NOQWV2201180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3ac0b55a766fdd38b01acc19d432835fa5029341930fe3e5fd71c18ffe63fd. 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/QZK6G2170171.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c00a6dbeef16b9db00fff6fe43e6bb4dcf3317b0dff6a71e9d0b0f176ce76ce. 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/NOHLX2014010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4422279b484ca0ac3ed3b8b5bc5b92bb7067e5c7cef985f6368dba06007aa8. 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/NOHLX2014020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c637682ebc020660dff8ee077be951bd567b17a658aeb5f92ee981e608e1e3. 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/NOHLX2014030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228936ed9024cde5333769feadae5451fa99c8504fd808fdc22a3622f8c2c59c. 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/NOHLX2014040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ec813a1dea0e830a1ec69e72d281433d239ce35bdb58d0722a2b36f588b392. 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/NOHLX2014060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2121b74fd29e0803f81927fe5130019f18de7aa955d51802dab4351138185c24. 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/NOHLX1879010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b760a78770c104374d261a5ab90a721c744a5517d9d856cab9dcd2245463b6. 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/NOHLX1879030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264e45f9904dc244287cc5734468b35cc5f350a67c56c61814037ffb00716973. 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/NOHLX2097030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919c48a329c102b183ac42374955917be2e5973c266415a1f860261365c6615f. 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/NOHLX2097010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda83d00efbd9197a65f09d83128ab22d6eca4fe4cc86c49bea28214976c966a5. 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/NOHLX2079040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87f393d1bfc38e73d7fa9780b56043bc6f080fffd89c0e51e708e1dd8dbbeb3. 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/NOHLX2097050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c856c381bd85abf6fe10ba0a8ca4c9399900acb276411e32143df8c979fb42. 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/NOHLX2097070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b1f91096c5624b3a31a78d36f02f20dbd48ad1875efaf3d6e90268143fc778. 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/NOHLX1757020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dac17c04ab37d22e42f5dbf683ac74b1bc608f6e4aeaddc8beb430c60fbce5. 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/NOHLX1757030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe1b49e39d57c85cc8887fe3485d3bf19d141edf296ab204f9a7550c9c12a83. 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/NOHLX1757050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaade4556912fc6bb0cea1be553e8e5ef85c30613b93a1f63fafb6ef411c8e53f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/NOHLX1757060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a13e2a3f432f5d0672332d7129483ec334a14e71c20bfd36d5b8aa3bdd1dd51. 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/NOHLX1757130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044bc2961153c7d7a9eaadad73332a84e7d7a1db7ea2588726e1977921785b3a. 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/NOHLX2345030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790d2c87804eeeffe354b6f4353fb9ac239706b5c1ce2e5d5dd2e9095d5d1afa. 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/NOHLX1757024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81af2837cc40c1920ab202046ef4a930fe36df318943aec5964086d35faf62db. 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/USZXT2350716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1cd4e5551cc56c472dce04b9bddca6c51089efc6045b240bfc98784665b065. 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/NOHLX2257023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e48c37c74cb49ebcb997ce78e99ebe1fa7697e5f7b8ef99f6b04428cad6146. 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/NOHLX2227010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd37e017e8964f6ebad3bb7242e4731baa4758953418570de88f6d068dd0b681. 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/NOHLX2101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046202e1e119f44745f6c691a8329c2846b1bcd91320a13f6eb587af183dc69e. 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/NOHLX2119030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6071a06b364b43066d17dc33d02f19a471ae3dd45cd5cd3c5a1b86781488202. 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/NOHLX2001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022485fe3d13b9215aade5200a51b2f9f3f2e40aff20b55b67eb6699057c27f5. 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/NOHLX2001030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1586ecb24fda57d25dcc92009fb43b6f88872f0c8b87645858bd73807ba07e80. 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/NOHLX2001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c30c15c589812290a424db7c6ce23eee75dc28c8348bb1eb9eb6e6e28e02b1. 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/NOHLX2001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e51bd0509f9c278aac0c3a41c12a09bac412c5b5a40875c7d0a9b541dc729c9. 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/NOHLX2089030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518e64198a1557e4bff34ff116c7aa4edcec90db02c171b41a51d9eeaaf0eaa4. 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/NOHLX2454030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c0d8cede71db82879bdd725385ea3c0c12b4dd55d39d8b123599d7941c4ac3. 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/NOHLX2454010.