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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10324dd526341ddd791d650b470c6f9093ff06abfaa8c30da0d0c2a42f904b3f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5470f7a-c111-4612-b091-4d1f0b33fc1e.json and https://artists.proofprofile.net/proofs/artist/c5470f7a-c111-4612-b091-4d1f0b33fc1e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0a2d39e6afd99eed16fdc185f853112dc66e572e5bc6711efb9f4a3dfc469b. 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/QZNJW2100682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaddf849755eb69967b83eb86fc97301e3d2293ceea7c168398818ca21c1732a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJW2100683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb40c82f8b24fa2ea040eff181f4fbf2a9a5d881101e58539ecd0f01990d961. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJW2100684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ef7b39a9fab59db33fe6b052f03d7b9adcdd17ff64ec5bfdbe8f900490117c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNJW2100686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0648e5417e0af067e0694d37850d8c09d09bc3ac0bf9b7490d5214145e67c591. 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/QZNJW2100685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c86f940b44c0fc0d51bf86c3b6940db3e7c8eaad2707624e0db9291d58312d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJW2100687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a48e133305d11a726276b12289c4dbbe7cb4a50d57047dd75344c34b1d22b2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJW2100689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe77e2140b1beb21179b08fa202f4b8e5b83919599e6a7bf043358a97670b9f. 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/QZNJW2100690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc58673640e2bf3b145a20f3e3e9f9f6dc7063e2e8e180cd98f9f3a578a5aa38. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJW2100691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ccbc3bf04ac8760c7b97faefaf163a5191b1dff5f15869ca2c679815ea409d. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZNJW2100681.
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 0xbfa5894ff0b5fbe8fca5c630d4584beca32f511474fd01d3870f951716a56973. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNJW2100688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c9688f99c521c230f2d81229fa6f14821efe501a2bdba2fd9473c9a4a640c8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNJW2100692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c82c2751fe18c1575edabdc57247b986cb24ea74d8177234af7b0457780106. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZNJW2100693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45984dfd0046b93b5930eb19ec4b296a5685f189f1b6e695bde5b025fcf63e83. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZNJW2100694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a9f37c6102db6953c5468910110566d130d9aa4f4322d96c477dd2f32f34dc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNJW2100695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981cdb7e5df7a40e167089e9753e0734f3bc9e72db094e8c92c58a515f3ef96e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZNJW2100696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625cdb573bb8f8305dab0062fad9af5cd78163d2652ab2f0e957274f59deb877. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNJW2100697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119a14931460f9859eff5bf701b62aeb7734e20b1368cbaaab96b96d2b20d907. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:16:53Z), 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/QZNJW2285352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed1d8999846eae8768c462f208298fc86729214f6d12ce088cb207d20676cb8. 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/QZNJZ2384583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7660913b9acba8937da477811a13097fc3313a992e638f18d158257020d99820. 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/QZNJZ2384584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7edaa2da5fb5a4b84ccd643a77d4fb5a46e92961ad16780d5d2e8193685f71a. 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/QZNJZ2384585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefdce8926c7205d5a43c0ed1df40436578c346926ea8ff88994f3b14e5763c3. 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/QZNJZ2384586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e66220020c670938df9c9662feb93f964df07580d71dc82e6283b2f99d48596. 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/QZNJZ2384587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc67e07cdbc167fff6e972d6b561ec4b5b79319ba5f9b4a9321eb5a6a48f2db7. 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/QZNJZ2384595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63594c7a195bac0885c6ec1ee193b1c50b1b8f5f0424c6674a38d34ded55ddb. 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/QZNJZ2384588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973ede5d045e7154098ca751fab026c714237adb6ac4d8b110c20a71d3957316. 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/QZNJZ2384589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc58c63b10b68798a8eed6f0d292393e73f56d13eda07e28c45ecd442fb33b9. 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/QZNJZ2384597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21e433429a027551f23985cf6fe0eaf596bdbb25d9a5b1e17d9b94361e1147e. 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/QZNJZ2384590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaed7773de49801d0c9f6a00d77b7f7d54eec7ae3a1075166cf54d469f9fcf07. 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/QZNJZ2384591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb69f781489fd487db3db5c710db4d1a6f950a7dc29eef6f48459b1bc3b1b502. 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/QZNJZ2384593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82054d4206acb378ed57fe2247bfc1c441c8640b7470ed4bba3cf7ae9e6fa67. 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/QZNJZ2384594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18a3e205043432e48281551598d7a3c17417454dd33eb9e2d866c5072631f2e. 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/QZNJZ2384596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ecefb42c270fd29234e447d66ded9333aadaa0967d863489f451e0c5ee34c0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNJZ2384592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75192ef2f5c9559e03c7fb4e9c447e76b145db9fedac4b3bf65568a29556a9a0. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/US7VG2525987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3642f009112562e9f1a9217c23aeba3eb1523698c9f9d7eb6b2cfd7714c935a0. 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/QZNJZ2546986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e9a8736a69597cba72aa116a8a8cef714adafb0e2817c6d4e62272beb3b33c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJZ2546987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fd03e5759faa5c3cbdefe610629a6ef29b1ad31c16e8e88ab81e0f2f74c872. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJZ2546988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04982870f1d5ee4df9f8d2acad3b848270a958f49b0de326e51d84d06168e728. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJZ2546989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a271b7c8b61e3a1305300c97993aa3cdb3246591b97ebf1e3f5f5ce124f2a1. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZNJZ2546991.