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 0x22d2eeab53bea5186ea5d0d1ad3ff2b792ed40b2886dbec4ff0555a2157770b4. 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/b5cee704-68c7-403d-aafc-508ea19b4702.json and https://artists.proofprofile.net/proofs/artist/b5cee704-68c7-403d-aafc-508ea19b4702.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 0x58508bd04bc3bf75f6c9df45121b920a2d2b943abcb84c0609eaa4890851d737. 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/QZHN62418058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbef06bdbde646d43871bbcca8051ba5e3862701cc64017d560790e4fc78df9b. 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/QZHN62418059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f7d369c2ba3ab7e41f3dd2e4f721dc36319edb90bdd0e45d86a5a6e2914745. 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/QZHN62418060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb3e2204508e1e19967e69222658bbce0cc3344cf362700b9c245cd1c398344. 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/QZHN62418061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc2564fb474f0a907069f4d033830320f7ed98db92d67641771e15dd0bb2562. 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/QZHN62418062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a237fd946b13a6c278281443f96864d288eba51ef22bc018496659b525689c6. 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/QZHN62418063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672f4c4abed79065808a30036609e2a871ccdb743c39ad27b37eec5ebac39961. 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/QZHN62418064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ce4345bd1aed6a0b14e5a86591883e90743d016d32d024304e8b2a7fa11326. 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/QZHN62418065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1b3980de5ecb8317c8c620dc910b57a935b77a6eecd168bb8d0b9f491b9609. 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/QZRP42352139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935bdd21632f7a3cf33a429d34da8f9bbacdd4fd7048a83664114a9a92638fe7. 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/QZRP42352140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e64dddf72e6c5ff0f9f5eb95d6d77f28183b99c227cda9d99e06c4df335fe8. 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/QZRP42352141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6ea1e94f0594f5d6dba4b392a66fc3c75e7bcd97d4f9345bf1287eb8a5ab06. 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/QZRP42352142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dba389dac46e3a32559fc9d9cc3b78c2f6b1c0ef5ae4b3f8f0992226f2e5ae. 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/QZRP42352143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9984da335bc7c996fc014ef1601bf079dfec937c4c122b0d812d5911c93a251c. 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/QZRP42352144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa10f08ed9504d22eda61f445fbcdd0e6f0ef97e417c29ad366c7e860c68705f. 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/QZRP42352145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7e56e2c3221fda13ad9aa4a5a83c1b0d1fcacefbda0faa876254905836bb47. 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/JP92N2442570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e9e559ac86873e89f969646347cb199da2a5e0202637f8d2cecc0852a09fbe. 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/QZFYX2447355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef561bf87de53453d9d28a617a176ae054147d694b0d77ea652aeb75de9afb8a. 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/QZTB92331326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870630133b67a5d45efe3329d371e3eedb553716239a99fa7873be9abc761b93. 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/QZTB92331327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bf051640c42c78001eec1dbaca48ac930981689ccae7b5460d56bac0d4bb10. 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/QZTB92331328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac715e7801721d196bb3cdd13c3905149e39de667d67b3b649bbb04f0ce7cae. 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/QZTB92331329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aa5368ee4826639a4443e766f03f7f4e912d51e7f552a17bcc108a99f6d674. 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/QZTB92331330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285bd30dfbd7ea7b84354c566f2fcb8301484e2f8f9c06bf41291fd862fb4373. 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/QZMEN2358551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad881454e84488b32de77ba41b16561677006abb1ddf5d485ca827a8b4c45f9. 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/QZMEN2358552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122072301c38e1494277b4e8d8104853ff2b4ed1e7c78e1b963e5dead9db70e5. 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/QZMEN2358553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585531abf5d141e1f5b94c93fcbdb801303696ef88ff05589a181167340298dd. 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/QZMEN2358554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3159e7918a1a99e8d0e5d865b9c7738000632e548e068bd5769f5a69d5b2b40. 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/QZK6K2344354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0572d7b795ea472b3c4a70dd693af4f240c9f48d73917017da0c4514ded202. 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/QZK6K2344355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47867b2f9b4c16a911bd01ad3649dd79e16ef1cf904a4acadb986b2babedd12b. 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/QZK6K2344356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cf3e10d50282ffa16a23f3e256fc05ead8d895728e9b21d4bcd5d959a0ba62. 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/QZES62419034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3f8778e95b252d1b5140751c35088948a81fddb31c850a63c0d520221a564f. 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/QZES62419035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbd8628d110730079e4a1441e91808a20f2e389e2d496d8595e61e4c1e2a8b8. 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/QZES62419036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5667d621c73738afe9450870dc659948e6c2ac9ed5657a4fabbbc554d77e49. 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/QZES62419037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0531f7211657f06855e10bbf7033cbedd0848dc7a227a2aba8c769a6ad816d90. 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/QZES62419038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325ee252922e983e1ed368460efd853e2e2c8224475f8ae753975f1a079fded6. 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/QZES62419039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caf24ecbbe52ac28896c3fa11d63e1af341a4902cf7a3e62e3a8519914d29bc. 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/QZES62419040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7e0d885f514fa8c2978978fa121200df4cd1d070553cddb3d63272fda05b62. 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/QZES62419041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3201e5ac8496bbe6d83d222b2d5515a22866cc2902db7d2e2aaf2d82a66c60df. 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/QZES62419042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd513f67426daf95ffc8cd2b45f7147cbd13ae1364fc7e567401eebee5c105ce5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFZ22484567.
jazzy simp - l'épopée d'un jeune simp torturé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f210989dcefa03436295c342467c24ac51a1751b35f02085bdc2adbfc0b58d4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZFZ22484568.