Zuzana Navarová de Tejada (18 June 1959 – 7 December 2004) was a Czech singer and songwriter. She began her career in the early 1980s as a member of Nerez, and gradually become one of the most signifi
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 0x60cf9c7935a7aa1970f8666f9ca031f755e171e99008c2b8a0e5a611a665d853. 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/c2f0215c-144d-4045-8fb8-d2f3c99de473.json and https://artists.proofprofile.net/proofs/artist/c2f0215c-144d-4045-8fb8-d2f3c99de473.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 0xed5f7b3daad967d537812330a0839f068ae6eb9a60a1dff83122f25b0db80e32. 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/CZA759909501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9141505dc11caafce4e8b3d861417928ba5d2d73f74b06609500d0e880e2d4. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/CZA759909509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2832befd5dee01603df874feebd07c5d074d4b06735d67178cdd7d6907be8177. 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/CZA750012803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41308c93f62aed88efb3a10e4d3ded1fa13a2a25b992610316078351ff3967c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CZA750012806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd234d1086f678af693c02db92b5aa2a007c9cf18bed333888e14f8b550a520d0. 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/CZA750012808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338138917e72698b3a1b73a5474819fdd0b30ab46e9be46061b520da78b2f01d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:21:14Z), 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/CZA750012810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4699c87929894e653659fe6e045f33a95d8f099e3f16d4946bf6104dbf3a0cf6. 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/CZA750321303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa6df96cdf7b7923f781ef021f40421841c60e9942ee0f5c7aee780f0e6440d. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/CZA750321306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333a191b139285c3eda7b3aed74d4a0f900eea14403552b99d3672c7b74e17bd. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/CZA750321308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc618fa123281555b0c2cfe8b6eedee69e5e376be96dc67742d3ca0db98cbf5e6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:18Z), 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/CZA750321311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428744adfffb3fdd85ac023fda2731e70629c3197b6048df10c9e23347428298. 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/CZA230100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536c21fb5b8b0ad2f29055b4ce298726befa139ca37f32f3df7eca38826e382f. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/CZA230200365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21b42ec7d6a71228ff9a181c7c19139c970316b4f5d2f6372500b7a1c004fd7. 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/CZA239200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e0eb2d706b314faa13fa95309429a1f1d613866449d46f37045b9ed8bc5c20. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CZA230100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92798cb1cb785b764f3ab4010d78993721c05add71b207428b8905303b74b728. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:42:09Z), 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/CZA230100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad308c24ece5c6ee272a8042a6f5a0d1a40f86333edfcec04078d4c06fe2b3e. 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/CZA230100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5548809a30950a4fc15724bf0a30a999e42784da4ff17fced61012b61774083e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CZA239300251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ad505c917a7329efc64ffd35ecb1d80a23a0a206a1bdc7f80f9cae6d074977. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:11:33Z), 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/CZA239300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9c323b29a69227a4710812ac46f033d0da256b99fd5ef841612607d10e3827. 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/CZA239300248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc0d49d62436d817817b8a680fb85c2f8f0376b9cb105ce7abe7eb3f7b4e0c6. 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/CZA231100507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7e0789ffc0af81532d87f61945c2e2d32938fdaf843d3deab42d035af72a5e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CZA231100508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4904e5faf1762f186f02e51018883767fadf430710bd5591377f0d892fae1e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CZA231100511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ac84ab5fa08c782f5e35b443fb4802531566c0bde221a1552c489963e9aff1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CZA231100513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e8217a3e6df5012451ede5ec2e5fdbe2e0eecac4c90c70b5c893b02e941c70. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZA230100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745314c204c84e69970c2a34c109ac3157660fae72bc2b0f52604a8dad3e3b1. 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/CZA230100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb9c8a7e9c41a8f3cefe5ac21bf468f1b188c535abe4b59a4d60eeef0b74ba2. 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/CZA230100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3785d0ca2b553899efd6484ea21a5a2e79c207eb693ec52a4a67b19b4e6df558. 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/CZA239200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11accbbda0ea404b6bc610aa763e212cce3efe70fed6c8e61cf8a82cc0297045. 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/CZA232300112.