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 0x79e7fef1e5c99bf42d699aab769a45d4d44c737d22786e94879771050264e9bd. 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/5bcc91c5-42dc-4733-8d0c-d0c3791f2ef6.json and https://artists.proofprofile.net/proofs/artist/5bcc91c5-42dc-4733-8d0c-d0c3791f2ef6.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 0xb7e8a98aec0438af64dad46d980c6a13dec3526a03089a36de8f93faf8cb76fe. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZ9Y21776244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519acf88b211675367bc4bd813932480fb58da21d7261dda9b3289c2257bdf76. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZ9Y21776245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb1704dbd1f61bdabe8b55037eb037c2b236ef4b97c44ebea5aba1efda2a64c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:17Z), 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/QZ9Y21776246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb905740e1f24773be1c5a34a8e70f9bd13715d8a0bac69168d49e6fd5f0fd795. 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/QZAPG1749562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aff1166f282bdc84750dcedc637abcc8560d7995fa93c327c6b62bcc65baf5e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZAPG1749565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be95e4fa8808e9cc4fa89e454abff1aa5cd5595a2a6f9c05f5c420e3aa875a. 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/QZARB1890248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f6a8f25c90f5a56ee976e76ca67d83c7f8b5f6f45b6e1889f0dd5bfb166a2a. 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/QZARB1890249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c10eec5944989aed41965e0168cec5acdcc4743ff0b4958c6dad697cdddd488. 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/QZARB1890251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4163aa02dfb1db37ff3be4cddbcd5424a5c053fcab6180b5ce0c6124e969fa0d. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:23Z), 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/QM4DW1855526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070821f4624c5429a261676c39c57f1dc3a01a337d0552b099486250839af84d. 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/QZDA41812912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba0b27970a1ea5dcff6a1b06b38c131b87681bfe93944ed20ddb1a59fd1322b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA41812913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3488a393ab97068568a963464e68a206da6c275459f7945d34815c67efbcd7f3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA41812914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44d080236566a409784052d9e064c5029a5eda6afcc69edf956f1586ba1a185. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES51882095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cec99e317f97bdc82741b6d9641901e5e6bdf6132bfd660f640d88004ec11ad. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES91867281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a235e54092904d1842e0a032f8507404b9e6dc4dca152abb0286b96173388b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZ4JJ1836541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69147077a1fede5091dbb356cad97098d4e9d81ae4c86746f9120e0992eca1ed. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:08Z), 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/QZES51958870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6894a845633e59da7bf25657e8f1bccaf8f12c3c452e85cbe531d622d3482d29. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES61982351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc01fd2b49020685bb89cd8b15b35cf12d069845c76420ae1df2f4f0ad815938. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYX1947483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5e056b47d32b91d98761637be4ec11a0574a8e1027cb824a07ba8cc69c7a9f. 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/QZFZ31966748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9565482b57767908d2b4dab5b59c1ef8345ec96439471b998abc315b0e5ed84. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USUYG1287414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9377cb28badd6283f80493553d6d2e0daaf05717a22b91a193a403a0aaf4e1. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/USUYG1287415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9a0af088a9b78da8d084c9f0e849dc11425a9769f6ab7564557f1b16e21665. 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/USUYG1287416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba66c97e45cafc9c1cca7fd42d20ef85dee17d8d1e4841d52cacdd0b131b363. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:20:17Z), 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/USUYG1287417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a25e0350054063b23ba5adb370c8a58e21c37f47e12c426946c67c7fc76788. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USUYG1292378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408400f2025dc13a55de748b2094655b1cfbde85f3f425d5666be10a9e970096. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USUYG1294846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2e61eff1d0f52db3e2f2bf093488f85f622668a71e54590b8898113be4f2d6. 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/USUYG1313086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe420a82bbd92f0fbb88512ee4beac4c507fa775e46cf113099e641bd3b5bff2. 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/QZHN62007820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdb0899694da5b2bc691bb8f1429e7ae5357400ddb7c4e463f9336893085722. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZHN62007821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c0fd49957b833ce21e508c4fed9ab718053c53edebdcdaa5ed6fc88ce2a6b0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN62007822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c53a28b5fb034a5d9ca400a5016087a70794f18dc84e795975077507dde7b7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHN62007823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0b827f36cec5cbcbd20a22317538f88ed0f21f9492e5993f2ff9e060794792. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:29Z), 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/QZHNC2078358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0961793e48257e88cfe7eb9fcdf0096e616ecefd92857242d8d359ad59282a69. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6N2040728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dc41a05aa2b86c063d52ddedec18659225da0d8a8dc9ae8bec5f9f9051dd45. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZK6H2027148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952214e4a94f92fe15a4bfbfda0b100cf3df830176e01f1cb88b1f43b51086e9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZMEN2030986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8b9ec034401bfe4ea131af68b64948e3d0f116d06deb520de36dbd90bb4643. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWU2078741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f9bb8cedc796334d641ca77513b531076781761e316a401b8d3cab9b6ad668. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:04:12Z), 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/QZFYZ2171431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc596b05243041ae43370177b6c4c5dc532a1085f942f14c85633694fe4f8706a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDA82127284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b91f1adfb7830397eb725aba47da01f2d61c40a1ad393c33fde2b912f5b98a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA82127286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a76957e9fb557f16250ecbea8d559f967124dd615d848e55c0b3d5ae05dea9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA82127288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aba6e84364c003471d80733da53df9d1d0280926004a7acf5f0ae086fc2ea7e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA82127290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971529a7abf55545afa7a4be5b34fe24891cf18b52eaa83bd334b5cb6821877c. 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/USEP42008013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115cac0383f22e07d7b56d65ed36ccc632cc643aab9de2f4f2c9dfa199768047. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:52:28Z), 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/QZES81876601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f25a354f4118b1e84d811027fc6dd3c132c647fbe60cd312a8cfc380fc8dbb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:24Z), 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/QZDA61817270.
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