Luboš Pospíšil (born 6 September 1950) is a Czech singer-songwriter and guitarist, and the frontman of the pop-rock band 5P. In 1969, he was a founding member of C&K Vocal, and since he left the band,
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 0x621beee33e7903a566966f85129cf3ce7b54b34ec35ffaf554195db8a2811780. 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/99f65c86-fec3-4588-9ac9-ab464591bd3b.json and https://artists.proofprofile.net/proofs/artist/99f65c86-fec3-4588-9ac9-ab464591bd3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
...A Nestřílejte Na Milence (Bonus Version)
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 0x25a5ffb309224d5a82c7d56d3093d16ef3e5dfce70367c6fdd50429e5025820a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CZA168600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bf0e03cf7fb737d4d54ae73280638b029efd4a3a9cb34aacb209c3b338eba5. 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/CZA168600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fac4505cb6db10e143f8b7db1654b84fe3b7246bec2372fda21cd57ce38aa3. 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/CZA168700920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa093a165687fac29938cc4b1192320b1e6100850006891bc3fe79d6af5eb79be. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CZA168700929.
Vzpomínka Na Jednu Venkovskou Tancovačku (1977-1983)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240120427fef52faf126239d2b0f7d6c0fb17cb9321b3b2c4e46e4627a004e35. 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/CZA168300867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9945175cdd4b84ea4728d6b8e539b3cb356bccc2b65b3411536b4c31021fc1. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/CZA168300868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f89710ee30aacd184fad653b4777c2038d16e39cc756fbeb8e39c0d67eb937. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/CZA168300873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a5e503f4b180b5e20e111ac36e88558c8424c792dbc0f09a07d1b3759c2d3f. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:08:17Z), 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/CZA169800229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352307930e148ec3e2322337709d1d3f14f34db43c4fc02a20001f8131cd9d68. 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/CZA160800342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ac3d81d6475ad6b568cc030e08106e99764fffd8ee97c96c8b47afa191d70f. 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/CZA161101304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2822f3c43ffa515797938faef821ef16582e845244bc85830ec6b85b1655b4cb. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:53Z), 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/CZA161101307.
Tenhle Vítr Jsem Měl Rád (To Nejlepší 1977-2010)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492ba8a944fdbf7b2aee80ce27468416dc7ed9d205b1fd1c775b89baf75a9d3d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/CZA161401774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097f18ac83ca99b1a499c82e38c5feafecd70f8aa8a79cf4950d33f78d556c5a. 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/CZA161401780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8673e64f6810e8610e211c47aad7df50f14104c75b8dfe04ef3658e195e005. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:07:46Z), 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/CZA162100855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21675879538cc4c9242f4b4bc28729568211efa7cfe8b4599bbb0ef85e52e86. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CZA162100857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163384a5bf48ca66ffac7e3ac83fde936b8ccaa0b3419514bc32eb01927358d8. 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/CZA168600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492ba8a944fdbf7b2aee80ce27468416dc7ed9d205b1fd1c775b89baf75a9d3d. 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/CZA161401774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29bed7af2467054a22f1966473585a47c80209c2b654ce9659f9c3b0e52c109. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:02Z), 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/CZA168900587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc9eb736da6be71bb8a0020a82e56e9268c0a1bee721d1367721f41cf570073. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/CZA162100864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240120427fef52faf126239d2b0f7d6c0fb17cb9321b3b2c4e46e4627a004e35. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:42Z), 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/CZA168300867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94e4325ea68bd50edb1142b77dcf8aae4ab2fedb70ca2ad2f68f72f7c256ccc. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:46:58Z), 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/CZA168600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d2d2bb8a1e3751bd34a0058da0ee874d70fa63b14e897f4977f662a346feea. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:06:27Z), 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/CZA168600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e3231faa7ccbae4775f9f7dfd8ee8f06e28065dc7d9b8a344adc33f55a59da. 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/CZA162501447.
Ahoj, Tvůj Petr Vzpomínka Na Petra Nováka (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb756c56529cb96da7e4f8814c180d2f0da5d4803ba7586c0594040530bcc0270. 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/CZA160600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1897076d9e0f05c745ad4493882dd432208ffcaa69f5b50a1a42074c1b45c75f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CZA160600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687f41dd52940aaf660a44baa9c4f78809e0ad3f214f111e18bea30749038dfd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CZA161101056.