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 0x1a898232d43124565e6eb90b3c2fd1b715e76df85eebb42b41bb917837ba012f. 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/41e38346-dd99-415c-ace5-4bf7a0ef8362.json and https://artists.proofprofile.net/proofs/artist/41e38346-dd99-415c-ace5-4bf7a0ef8362.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 0xe1bb06e74135b2afa7ad9eb9fa1a9ff1c28abe036ddd37c4e2a1926abc49d26a. 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/QM24S2003221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0068f77678abd5e7e5b9166848c2a600b24bc3100c3a5c10c7550ab5e630a868. 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/QZEQU2401564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135be9a1f24118e9ee17ec29ea9f5aca0333e2b038cb4e8bf1c0569204e0b98a. 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/QZEQU2401268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135be9a1f24118e9ee17ec29ea9f5aca0333e2b038cb4e8bf1c0569204e0b98a. 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/QZEQU2401268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5017114bdc2b975281790fbf6bc6d8c519e6cd663e290e073b2fce28d9bad036. 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/QZEQU2400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a97629d3a03fa1e60984a4d5af40ca30fbc230f0ea3dac7f8fa5d06fb0f428d. 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/QZEQU2400811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bceeaa851c211c0bb4a838bfb4a5169e82c0214a685eee14769483c4966780e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZEQU2400812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc8ab61092425a00db4100309554dd7b6cdc6f4827d30ac8c3e862f4fcc9862. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZEQU2400813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206bc02f79bff8a65450d8858dd644947b39334750e3246e8b618e5f6bdcaf32. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZEQU2400814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050aeb4f6856220347e76c0c39b2c86d88265c926615f3890b450c9812e6fd93. 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/QZEQU2400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5017114bdc2b975281790fbf6bc6d8c519e6cd663e290e073b2fce28d9bad036. 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/QZEQU2400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93407ec6fa8f3eb2b9ef34052e42c5847bbf6cfa33b831355bcbeaa995273608. 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/QZEQU2301390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c2aae57cfb75c963995f2834a2a952751e9971397790934306264a8095cdc9. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZEQU2301391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2208e3d9bc2ef66579364022683aaf9a7916dbbc184c7f6af43149eb2f72cbc2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZEQU2301392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2f707e0cbf0dc91be7c6c1cffdff4dbbf8d8056e66c3ec3fe9e21cbfaa626d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZEQU2301335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85846362e8f8714fb119bdef9a42ec220004af58577811b8c34cebcdee18ba5. 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/QZEQU2300913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0476b07c0cbd7b1f70791c29a612d5803a0a40a152e8001d474b7e4a8c3ebed2. 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/QZEQU2300532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196a605474794fab33c26114c36b6e79e23ed5d2fdd9ebfaae7aa396e2bfc958. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZEQU2300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc65e765f00c86abcaf0254957bc18dc22a1eaa99002b11dd902d9680ba0c3c0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZEQU2268339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a7498c91825224597c06bb97ee7173480e508e5590936637983c61be9f96bf. 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/QM24S2200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85123d7ac0caa9cb8bc150e11d8ee5c3492c50279c6019d29f7f2402778ee2b. 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/QM24S2105150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f563c1a7de5285c60c2a44bc873ecf7f2859bb5fa0371fbe0f56db31b161ef7. 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/QM24S2102129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415f378f2bc41327d5debb45d0a101569d634622c926b04b5065f37a37d9ef07. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM24S2008793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dd7df3471e297dbce523da3c9318815eda9acf8ea938a93600956f5f9e50b7. 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/QM24S2006408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3351b5f85755ec51204e9c16a89e25ae37ad44bba72efc8a588a698aacdf8e. 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/QM24S2000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ce464d870424ca8d7598f8ccb882123273e0a93a98559f1eefd847cd317133. 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/QM24S1921930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c52f315f78b28849a6f070d82a09dcb0848a682ee0fcd9163c64443124ea2f1. 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/QM24S1833143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bf4830d7972f149fbea8137108434199c34350ad9350ab4ab6ef49e9bbb399. 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/QM24S1817940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c2c8baf59e687f40aa0b1f9f07c0fca466fedea00aa2604bece6db8a4387fc. 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/QM24S1817941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6269836761701ad2f20e8201d84eb2c835155cd6ddd2c6df9e5fe8ac9c682d1. 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/QM24S1815229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a40b42b7dcbbc30622067af00209c7d4cb83dfb6cfcbd690ed7dd50a581400b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM24S1810477.