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 0x81939fbf2074e0b304c9537f7236565cdaf42bcd686a6efa8c8056d3749f0f19. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80442413-2be0-4f5a-8bf5-5ad5eddcef8d.json and https://artists.proofprofile.net/proofs/artist/80442413-2be0-4f5a-8bf5-5ad5eddcef8d.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 0x46237a7bc6898d4a1c49cd9ead7e910e82a9d30b2973b63254c6e73a6de89939. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/UK43Q2010006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b94a8d7e027a4cb60d1012fe90011fc6947585af46750950f1534d692a538d. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAGB2228109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b19a8934c2021ba0eb65d571c22f27fc26b8fc3bf4bd85dc7b836eddbebd2f6. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/TCAGB2228149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27693e45908f5d629141ad2666049b2ad9d6ed1ce670ac5eaa5dc64791a63bfb. 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/QZNC62208036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd710994d56fc5cb0edd06eea193d9e32384a99d0dc3ad0acc8fa2145b672a9e5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNC62210498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cc32dedf351507fa54768947fe6ea252ca1f1894053b3c9bb0482e0f810a16. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX53U2380179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933348fc817aff1285a5084b78aac37f6e2d1556a1f8e2465a60c78781859dfd. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GXF9Q2445401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c242a95afa76d543c1fa97727b6ea6172c3c57d565158ce2d57897e9b260ff. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXF9Q2583482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b35f48f966920cecbcf5a10b527af7fed73c22d902168dc7a7e669c86110fa9. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/UKXN22501063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4360fd515a9bf3eb075e850a05de56b7c7c27d351c936face782050b7f3e2e05. 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/UKXN22502911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a153009eca1f2af906ebec04c9eed1c9f10fad5dae36c7ff5cc9257f6acd593. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:52:52Z), 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/UKXN22519924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfcd0b5be8bc03ac11d7dba1781b12b2a36f301fd2353b1928a0c16749da6b1. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/UKXN22542159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd753a633ee4e0a2f55e5e0be6f275c763f9b8aa583d3e455919f000bb501ce8f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKXN22562343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1971c9e2008500f6c8284dedcc83929cff6dd4b57b29a70cc38aa834f081533a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKXN22581767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653165a7d71ddaef7715840af0f6a4514b3e5784fce5029c180d651ac05f0c66. 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/GX3Q92518902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4327a83a9cef2c0b052cafae9be8e11dff5acc30310e1371e828460b1fc247. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX3Q92526565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6403c8805980ee076fa659b24ee4be7ae064fc23daa45454f4952853a10329f2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:26Z), 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/GX3Q92541670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa959f5da7bdb06d0a96ded8f543f0ab4e16fe4cc04dd5dc26555b0bba21ff5ab. 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/GX3Q92529005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09daba750dfa29fe8699f3e2d4ec6df30f4f6555af394f377deaf4034b51add. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX3Q92544482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbe3890dcaae3f378046172608e6ea27b54f50e84803de0e2ab37b80dedfac1. 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/GX3Q92565454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaab135604c5f2f0b8b725cc22b9b084c19ae1b4d8541755bb11e32da9cfa2bf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBLFP2535976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb60b6fd77aa8116a3396ba1c76dadae0875ce02d42f9cd06d314775e4ef898. 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/GBLFP2590982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeebda607c5a66e1b4f3ef3afc71067f280680145d3242a646e87b5932971039. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/GBMA22569301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f85358ef25a686c6c174f07195eab66a9e1e2d4c58b65f86e749bb6fe9ec0a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX53U2503650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4fca43304125bf00d03c26bfe8c40e45a2b301927f7b3d4cbdf60e2f6d374f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXHAF2557643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643561460ae1614f0b05a634ca45ce9c8eea1f03811b6657b39637b2dbc16cd8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GXHAF2557301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198ba2ee808c95a440fde46f4673470466b4022db9dad061d535c1a86bc9ad19. 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/GX53U2620015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7505469324292edfdc02b171edcf2bfc24db1f71a448cad8f029c42afbfcfe34. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GX53U2691135.