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 0x81d36e86e894511f1dd9783f7e1ad5e5c2300c0529664b731d1bb083e3ca6526. 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/54b928ab-f844-4ce2-a708-76def1c014b3.json and https://artists.proofprofile.net/proofs/artist/54b928ab-f844-4ce2-a708-76def1c014b3.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 0x93d4cc4525d97bef15cb39397c307e956fac553b5b8b7d0c65fca8fcad6d7e11. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US7VG1632769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf9c96adda934fdd5b08b298172ce38a183d2ebacbec54f837e9d3a80a42265. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZ5AB1768501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ace7b1832209c55ac1f62293fcac025fb5025c3b70067b6cf9507777cb110f8. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZ5AB1788793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd59214f18a34bed6c16f2d5c998d205e8e265abb88b24b32a5a209593a5aca1. 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/QZ5AB1854191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c18dc5d2552ad529c7fccefe5335ee335bf916fbfb81c34dc04708e75bc9faf. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/AEA0Q1868247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2405e56e19be9e0293d21293c6db654cb5f65085a02b05db2433103bc73493c3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US7VG2030280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8249e0a0abc67e5c9fce2398ce56a48d58259d3fc3aa83ead73a49445975cbe9. 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/QZHZ42038613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602c62a9b592f2815763d81693305734f18e0f51609069063f0b313be6f3c1cb. 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/QZHZ42038614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dfe6914b11796055bfec78eb5395ffeae14be607205ba43ceb3063ab956892. 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/QZHZ42038620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ba5444e0069b1c626b51611c687faf40d2ca3f3568c9f8e5bc10350b105c1e. 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/MXD782101993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9f19b87915022115b619db8bd27e3f31a8063b85833041de1104023ed11289. 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/QZNJY2245895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcb59334c0a76c53dbae73e66fb5e819185fcce6c2803ea1baa47688a0346e5. 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/QZTVM2246704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f319b637c2c4b2507e83c165c40ba9ad1057e1d6d4f2ce8ac0fb3e13945f72. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTVM2246814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ea6cf2043815a862f60bc4184f1ee71ec6e9dc6730a4f2feacdcecce8b3028. 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/QZTPX2428198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8863f588b667fe302301ffc32c361eb48546eb0960f2f50c49ec40e91effb88. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTPX2525741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1488ac2670cc5c3a05888fa39173c68a38888432beb15bf5c22d400ee980ac2. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTPX2525742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec21ea8aa8fc1be141022ff687592531acda201d05c654da009c5ad31600fb9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTPX2525744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0176d5afe53ce15089ca0507cd5543c07edcfae080acbe0a4c1460919593ea2. 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/QZNJY2306244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c1a8520f94b2f64a26a22a1c0e1749feb15347d5dfbb0e42c59584874ed8f7. 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/QZW9K2247154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c1a8520f94b2f64a26a22a1c0e1749feb15347d5dfbb0e42c59584874ed8f7. 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/QZW9K2247154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b90c29bbe1d87bfc0ca7344e17d5f574a0caedb0e4365163a523776675ee025. 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/QZNJY2245177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591c4bc3f6c09656770d54576c126118b359a13acacf3855555266a9853dc61b. 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/QMFMG2377932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc628e1e1f296fec480fbd76102c02fd5886e2df239af5d4c4b2220b0e16d8523. 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/QMDA72154011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac02c318d57729b4f16bcff5ee9ea59e6a1f4e61a1c6243489e1a7cea51d9980. 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/QZHZ42215421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fffe8b2b2674c138a5606b241dac8c0f8f8bb2c30f203905051536a1ce370f. 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/USHM82491568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce3f761729b5e599b7f082c778f6c852f2fcaaf21f6a090b096694538bf112b. 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/ES71G2324080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5368a0f3d97fc10c0a68a299a17e1d904b99dca54a0f5997bba1e002ee996a40. 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/QZSYP2337494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d720603f224e3d9e6e00eab0ad878c333f4267c5870a4a9bf1e8d163ce9f92. 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/QZSYP2334085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb338049ce99eb3bb9bcfb3db6056c3c96c841c7b06fd4e5c4eaf40f76b46cb2f. 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/QZSYP2333844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b8fd3342b35a48f09af40f4f6b6cdd8d837fee1749d944621833f79ae1fed9. 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/QZSYP2384754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecda24005b0166c4d4d0d48f2cf68e5f9a65ff082c0046210782322bdc55500. 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/QZSYP2374634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcc91c7ee3a0360ee08bc923b7385503320dc71bb1f2749d90d23974f589af7. 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/QZSYP2383556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb4dcba1cf73a6b558ee2204c84da4b1df69f81c4b496163ec6052e3bfc11ea. 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/QZTPX2461379.