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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 0x27d59f900bef35ba5cd1607d57badc75ca1df30bc117f0be5ad63e909f7df5b9. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd7d8bd1-e5b7-411f-9973-72916eb10ce8.json and https://artists.proofprofile.net/proofs/artist/dd7d8bd1-e5b7-411f-9973-72916eb10ce8.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 0x00ec8d4cbb509a3efbf3751899a85b004d6b1a7b8e7626d18304537bda5b6472. 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/QZHN52453465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c447b1d2878c2abab16d24b98e4f0a9e946667691fe0ad0ef73ba26025052e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHN52453472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d03bd37a782e372b713aa669f1cf3c1b32ff02c9c762b761db9c2045c71d560. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZHN52453463.
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 0xacbb27b48f3aeb27e70c4c78db32368cfd4a279292baf5c3ca9f9ea835b27a04. 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/QZHN52453467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3482e72319b6df163ec6a8d71b2151c59a5ef7428783b3327951bfbd6b77de. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZHN52453471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c304f11d36c47af4234fa2f85dabe6c886bda3d6874b8f28b3adc82dee7a91f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHN52453474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dd40c30c3b5ef5f71005c96e2914a33b5448bbc3c81753bb873b10e2f1dcdb. 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/QZNWY2247166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0995c0ef21a8f18716b5e117ca82b52c7c05d178cdcf1cf0a3126762871852f7. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZNWY2247164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09e68e0106b3c7831be4e78bc533b4518cc4f9138c602938fe3bfd62a252d34. 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/QZNWY2226949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659be18b5990c82e8898e8edbd7e18d73610db74509b64a5943ecb7f25c60ab9. 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/USCGH1701253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd709a6fa20adab91de0abc551d72f10b44476e3405e032a2bd76102295b732. 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/USCGH1701260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd57e4009ffa219acab2d32a968b6ea0c12b35f0f2e470b8bf30ba7dcea8ee6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USCGH1701254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bfbcc4decb72e50bba5d3d2bce0816db1576d99f124fe21ada8bfe6bfb4fd3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGH1701255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f640be2f13a315a6616d4998c35f0f8250ef25a260c694f59dfb18ab74510a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGH1701257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb71ebba140505d0470c131f2530e7cd8a819dbe4cb1a197ce72aa64d57844d6. 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/USCGH1392092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce5fc4106e4f5657f3d355c09f84d34342c8177d0ccbe6ff4b7018fd17f6520. 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/USCGH1392099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060661a59427ec3de6d067baecc572290d6bdde6ea86db4eb70c7d1d1d73353b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGH1392100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb7f9437be67d0ab867798dc9f2637911795b10a7f57ad9ff7ea6efc3ba8a57. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USCGH1392091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04a32d41e17b905a7d889011784a3ea5bb20d787dcc255b2a0f110690875750. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USCGH1392093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e38d8f8d499dc0c76539ad56c6265e90ca2f23cb7085ee6baa4fcb061cf186a. 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/GBHCD1150679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf742b7ac1ba6e8ca81cc9f298f5cf6836d07fef84f998526b64ece44567b48. 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/GBHCD1150681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c149270941cd52e341f249f5a0df2add9b46f9982fcc40108ed10dce5ac6ce. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBHCD1150682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11176e9afb9992ce116e2d21f88cfd26498ac706a1b3ce662b4f9a3d9d5a75db. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBHCD1150685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad49d45e26b397212c65150e5461a8940263f38908d44c5ee80fe445eb35892c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBHCD1150686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76362863346677b5e688db7bcbc4632a18f2e14af7e503d817a9e2b99d11a475. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:48:32Z), 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/GBHCD1150680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6698fc808324292d627cb04a93958f8c31ae86ee05b3e29bf32fe063d90edd. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:54:08Z), 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/GBHCD1150683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c2303f93164d678e27b32d40051c4b91910e7659192b9c399bc2c9dda98fc2. 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/GBHCD1150684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4dcd308dd33e10dbd152953d8ac2d4160d1feb492a8718073e4dea5bda4215. 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/QZNWY2231107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e5a07528d85e6d651f441b5c007f5bb1f059db9cb8015debb9ba386d88a9e1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:27:41Z), 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/QZNWY2231108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d447777a39daef33a519dbf985ee99e2418ad00f1b943bd2ccc233c9b075729. 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/QZNWY2231109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d0da93ec4ef29feccb87f4b95f059cc5f189b1c60b9ee4d0f43eeea76abcb8. 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/QZNWY2231111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96755ef84535d44cf333b83b2d6c9e2e1ac574c99e609501d4b905776e2ed091. 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/QZNWY2231112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf979af414ac178afde4bf6e7e12143f2e291b648dacdb759d5d55dbac3ff5bf7. 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/QZNWY2231115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3298734c5a120a52dc5bb188b5a5867ddbc6082fb803d684f22287d1c501a27f. 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/QZNWY2231116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976df5c3fcea4775e060a0eb8a8cd2459cdf3c9014668b2201559ebc25ffcc98. 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/QZNWY2231117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ddd806b733290b8527cd7c320f424e7f6f279bdc940ee9ae0e18f955b36e2c. 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/QZNWY2231118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1327db2faaeacebb567d800e48b55aee80bfec71aba101eb4124c1be8c090e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZNWY2231110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260b859f1163444745e9eaf9634e61c4ca1111bb1cd80c09701c627a0fcec931. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZNWY2231113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed2effccd533b3e6fb9959ede1be355c0b1836ec4f6c0b23adee2ab60f666ca. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNWY2231114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93f11288be8be477f0fb2630c4b64b247d54c86488881a8c8603b92b942e521. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZNWY2231119.