Michal Horák (born 10 September 1987) is a Czech judoka. He is the bronze medallist of the 2016 Judo Grand Slam Abu Dhabi in the +100 kg category. References External links Category:1987 births
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 0x995037977ede24db1ee431f2628d01fc2c9012b40d2f29444fe1c68422ac42d3. 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/280a33ab-01cf-4b64-b5d3-cbd3c6f57044.json and https://artists.proofprofile.net/proofs/artist/280a33ab-01cf-4b64-b5d3-cbd3c6f57044.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 0x68f8ce54d4bfa78b7d34e61316568ac02eb2127a1b9b44cd1f81d1f5660fe8dd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CZA161900881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69462819e4fcee9b1c656272963e0b00a85a968c8d12f33146af7e676f6d020c. 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/CZA161901274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc9065bdcebfc1679bcd6fcbcd317ed61c535a81bdbfc6b5c22ac110cebc83d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CZA162000539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9df1f895cefa124b8b7902011c2c0d14ca6b1faa129c281605f806440ba6a76. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CZA162000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8fc2449aff3934b1ddbd8cbf89ef5f9a95705102e147506503488a0e9fd52e. 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/CZA162101075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb88efb545c8329921bdd440908228d256059317e9a175c6521a08fca96b2534. 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/CZA162300881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba66e6f7b430feedd40fefc83932687c257042470b3855e15feeb7184374217. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CZA162300884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b27499146bd12247b4071cbf57364c870300f470cd33fb6b68895c33db551ca. 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/CZA162300887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef92d88261653bd4bfc21598438acbda3bdbfe5cc9fd9beaecb0165f4ff9d918. 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/CZA162300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82698b398d93babb9260e03b029caca8275845d9dba80cb10228c7890e789339. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/CZA162300888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d24d399807b1598c8364c0902c7ed9c9e7de3fdb597e1d62aa1fdc68858947. 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/CZA162401864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1b53ea894ad2a0c2edb38d65cd6c65496428777d480d9ecdbdba9b99627710. 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/CZA162500900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c5f20a46969a02a5c5e3e4ddd700d82afd1d9895a1aa33b97c248f04f26ffb. 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/CZA162500901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df3be745cd8a0750b91e6de5b153601dc52121eefae350c785d35c0f74fe4bf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZA162500902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d66c98918bd9670e9569fa8abc9c2ff426f00a2db99a5879c1f12e9d964aa5. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/CZA162500903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2967151d3424968d85ed9e49adf9fddfcf6f756676f29914ae5e89b190571020. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CZA162500904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6642abb84c8b3cd0f70aa5a150ca3efe25ae0f0827a48e9641b89d2ed1a98c1e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CZA162500906.
Říkej lidem, co máš rád, že je máš rád - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6eadb594795297af09830dd35e1f44498f549b9f2a249e36b3a2b38ba3a3775. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CZA162500907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41a2acdc35d674906bcecd6e33ac59d6dfdd4ed2236cacebc31a2d62260e9b9. 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/CZA162500908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25af4bb73462b8fe832134228e273c65b551482f7a886c3abe4a4917077877c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/CZA162500909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da8172ccac56cf4af94c17fa07d9dedde281a62d558bba0524e83b55b276e81. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA162500910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab0c0c13e2a755b5179a6b7512a8cf8cafd8b294696916868ae594c3c6b979d. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/CZA162500911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b64a85601d81eef56c9caab45dcb05e4fb77e60f9e7f7cdbbb868bb4ae6cedc. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/CZA162500912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5984ca599a2c97e5c0d69c3919cbfa3e983e53482a2cc2e6d8fdf41221f08342. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CZA162500913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3073b2c0fa136c29a03561ce0b0f123984b06d97b222f8ac5a06e69ae24a4a2. 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/CZA162500914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708c12400dc1b2d20f6f9c8aefdf0b0eefc6762c988da774a548f27aa3bcc508. 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/CZA162500915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb770f5010ef9f4b32b7eb72b4ee9735d9cfd24f5517b912504a8962f5cc47acf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CZA162500880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ace488283762483526fe384601f6734b0cc749fc13a177ffd65ce38d1a41754. 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/CZA162500916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59115eaa7bcb43a9a7981b3ddfd292ed86a6e335c6bdaa99d4257f6f35d3f804. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/CZA162500917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ff7706d0decb14957254a6881bd4186f20c1b0470459d70c9a46a0acc2ffea. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/CZA162500918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xababdb9c51bc223a0666b3e1b4f31aa9c1dc43929000698f8787aa57057faea8. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/CZA162500919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a5b3d72e9a062ffefa7d0983d2ac2442c86fadd8692007dfc8560931f76cb6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA162500920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22750fa82e8707e0942fa2d45316a258e90365a312dc0b2c6836f8494236a2e. 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/CZK502406013.