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 0xde43755fa992081597600f1ad52d82797691ac77a94df3ee814ddac23c748c44. 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/686cb045-d7af-4c54-a5a4-9f48739a650f.json and https://artists.proofprofile.net/proofs/artist/686cb045-d7af-4c54-a5a4-9f48739a650f.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 0x0dc99e1aa8e52e483b7595b7e6bc8e9e9b9ca1f285c60152117aac4fc5a42a98. 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/USA2P2211474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0480f2f7b7413548cf551cef679115b0681fe84acc4998671f1f549e7655d5. 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/QZQAY2317178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbe5e44f31bb903eab9a18465bfae0f7e3772506587609bd0f4fe9cd821a910. 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/USA2P2259152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7707c970d0c1e17f1cba29b72c35d8395b68d8487f13c5276eafd4e833039be4. 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/USA2P2259155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43121d69986d84a5a4d91088fb9bba97b51e70d1c99fef008ef30927258755e5. 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/USA2P2259153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc99e1aa8e52e483b7595b7e6bc8e9e9b9ca1f285c60152117aac4fc5a42a98. 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/USA2P2211474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbda6b33631e562e45b37329eab35536a3eccb8f515e1bf6acc1e888038af4a1. 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/QZNWY2429282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc830ff2570e6a0f7ee2ebe81830a55948748b4c72d9e14a749b9221a567fc4ad. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMER2468210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dac1f1929f2ad2ef2542879d13e9472526670b7025742a735239f1ecdf6750. 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/QZK6F2420399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaed9c3b3686ad5ded69fd1c228b84e0c08d90d7b78bbe5d0eab91f23bdeb5a. 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/QM24S2401667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96de4663ff940199db1f9030c521f8403002d246d7413af89a260a8b5452cdc8. 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/QZDA52467359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb780c6b4d5a3b8a958129bce6dce69e73d873a8865419f1c8319c6020cd4da66. 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/QZFZ32405042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7019858fa7a8fcfaaeddb38364b2e047b8d9421cff566d534bc15cc5d8a677. 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/QZWFJ2300358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889019e95454f2628616b09ee17db03546817c94d47fc8f33f046395598d5700. 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/QZWFK2310488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc41bd30390c3bca06afdf56912e791b1cfbf940a2c0f04c535ceb23b32d40f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTBF2375655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74749ed6279a4ac3919e17b060c24498e53c003c64df753472e17b8b47cc46a5. 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/QZTBA2325040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3fb1423445491674d00639a70fe64d1acc2ddce7637f58db7308abaafd9ba4. 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/QZPLR2353194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d5ead8de7860035663d82ba643d465953823e3c2932cf76ec50daf1430132c. 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/QZQAY2383200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884a481c3db5a8d785481e655441cd89a195c9c469cac012679ff454af1709e9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZQAY2356659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07331be23eae237414dba107de0eb1b31177386500685c33ce909099332e9af0. 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/USA2P2225654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf1009424356f96bd04657f5f4e40c5f32fcb7459b8d05932fdc111dd5624b2. 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/USA2P2215284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ca837f3347a80fb75aca0ba64e38e14cd9c6eaaf95d5d1f9e11663c62a2652. 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/QZDA42248000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb681195bb05ff07fc89499435a5167f6d0ea4328f2ad62329d34f0f3f8f2140a. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZFZ32297484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a580fc27d2006fac602292b801f2fa7e5ed9fb5fe8aeaa554e94a55dd330d1b. 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/QZNWX2176816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21a7828a3468f96e754fb0c7467194a95e5ea8f69b2e6a90fbd253c54476e5. 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/QZNWV2137779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799b5344b753ab7901bd0d90ff5b90e24cd23e72ad504d74a81de80163a95e4c. 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/QZNWU2143845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aae314407a70ea2f2e885113fd24bb58d3b863180b23eb2f1f35da3aefae8d6. 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/QZK6F2156435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d3f13c4a2077231d5a8c509f67879e85570ff777c74c2388c93335fd144ae2. 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/QZWFW2444015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdff859e8780b4f56bc22d40b833c009a9fcd9807d81e40797e599b65ec089b. 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/QZWFK2443811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe627828312b333dd5ddcb2fff379c8129b25e400a7e99d013e3c58f59aa5dc18. 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/QZTB62438652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfe9e1c179d0a4edcc5f315dc86f147884a3f19f449ec741e7b215792488052. 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/QZHNB2540652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59078bcc99cf7c91d37f636614fd51b3ef8e7ece89f9be6943e85c8740156ad. 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/QZHNB2540653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd461f88ce294d838e422e59cf22916e7eabde55a3daccaa54dc66e50a2668d0. 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/QZHNB2540654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d69a997aefba82f9477f57c38ccee70b9380dff499fe67946914a7946890b5e. 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/QZHNB2540655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e289c329ced9c80af3f1c92dad22cef5cf33f3f04f65d478909b7f7639ebacc. 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/QZHNB2540656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99698bfa30cc5af97da78dcbd9e7416e979da4a2edddb98291d87b5711484baf. 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/QZHNB2540657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c407a50d1cef7802acb265576c35e2a2a9662a645177cade2aef2d3f1c96806. 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/QZHNB2540658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20f2672e3fb23f9feb1564e0937b2cd4e73a6cade1895ce26bca3d5b9f09ccf. 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/QZFZ72589200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1369d6cc646c2fc520687e903e1e518cb73a94a281b5e92468bd6fae478da63. 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/QZK6N2580009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2943128af8a50e2ce22b5bfb47966d0254771b733879380c0789c778b6f1650c. 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/QZZ7U2452345.