Petr Popelka (born 1986) is a Czech conductor and composer. Biography Popelka was born in Prague, Czechoslovakia. he studied music and played the double bass at the Prague Conservatory. He continued
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 0xb4980a2cca69b21203da04e13e47509f5b5e74ac98e09375649a7d3df70ee379. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1540046b-a6a1-4be0-b3bd-87e0f87f48fa.json and https://artists.proofprofile.net/proofs/artist/1540046b-a6a1-4be0-b3bd-87e0f87f48fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 40 in G Minor, K. 550: I. Molto allegro
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 0x489b088ae0b05518e60a563c0ec79340e56beab61457efe95cf7c9e32a1392ef. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOEHX2208010.
5 Songs, Op. 37: No. 5. Flickan kom ifrån sin älsklings möte (Orchestrated by Ernest Pingoud)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8362cf64cc2581713bbabea4f197a805a510e799b482683d388ba69194522e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NOEHX2208180.
Martinů: Cello Concerto No. 2 & Cello Sonata No. 2
Beethoven: Triple Concerto, Kakadu Variations - Vořišek: Grand Rondo Concertante
String Quartet No. 1 in E Minor, JB 1:105: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb303b7db44c80eb53cf15dec5d527daf42009d015f61eafb3401e195cdd0aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZD942400863.
Festive Symphony in E Major, Op. 6, JB 1:59: I. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7ba31596beb37f69d40cf859e08f07d2aa79552ebf9cd94d17a0d3942ebfa4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CZD942400849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba22c0396f280249b78558bb3848f0208f1f436e2817b9834985f203873c059f. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/CZD942400848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56577afed8889452d34c69082a0c98df2ec529ff3451d4c73d6f465c6ee99b65. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CZD942400859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ae75d3473baab3f2e6241f6c0c615487b1c1ab2548441e32d10de469f6fbec. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CZD942400847.
String Quartet No. 1 in E Minor, JB 1:105: I. Allegro vivo appassionato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94503702669129d1da16495600bd5d4fba7a6373602d344ed06f9fa84d7abc5c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CZD942400860.
String Quartet No. 1 in E Minor, JB 1:105: II. Allegro moderato à la polka
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String Quartet No. 1 in E Minor, JB 1:105: III. Largo sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0dab45c24b01686745c5853f2b8ce73b47210fad8a595e81ef01a42e03e9e9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZD942400862.
Festive Symphony in E Major, Op. 6, JB 1:59: II. Largo maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984e6d71a8b267d1e22a1574d14b119c3671e2173df511cbb21d1dd9bf4ac92e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CZD942400850.
Festive Symphony in E Major, Op. 6, JB 1:59: III. Scherzo. Allegro vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4c7d1d7652bd9d2dd5ecfe471614d5ab2dcaaa4dffab190a32476af562ca98. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CZD942400851.
Festive Symphony in E Major, Op. 6: IV. Finale. Allegro non troppo ma energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950108e2f902913d08e3c9357719c51a573d697838037fe9482720090a8e5fcc. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CZD942400852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da5641bf5a5505f9c8d83157c5bb270f15db1d5eeb092827c4c3d69a03cce49. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CZD942400853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd471e867225d5ba3d039348996d9b3736e3c009c9ba0a244ce04a1e62a2fe38. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CZD942400854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa19d9fec3686d9bc17e3e3fb96698a16458403b53804b0e7c8aeb4bb3b420f7. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/CZD942400855.
Má vlast, JB 1:112: IV. From Bohemian´s Woods and Fields
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf219a31a9a3cc86ca68d2cab6dd2d76ef783bd4378edf5fc55f3d9764fac5f1. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/CZD942400856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90efe27a71a613cd75c029855923063926baf2d1004a6ad0b2cb6c2066f35cbe. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CZD942400857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998415aff93b2d6980708d3ea183776520ccd697caf1b07293a4b9881d735243. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CZD942400858.
Symphony No. 40 in G Minor, K. 550: III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc412cd9e9c4fab72993c6e759170d17f3d0828c303209f48d02665d5ef5ddfe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOEHX2307070.
Smetana: Festive Symphony – III. Scherzo. Allegro vivo
Smetana: String Quartet No. 1 “From my Life” – IV. Vivace
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Symphony No. 39 in E-Flat Major, K. 543: III. Menuetto e Trio
6 Songs, Op. 36: No. 1. Svarta rosor (Orchestration by Simon Parmet)
6 Songs, Op. 36: No. 6. Demanten på marssnön
6 Songs, Op. 36: No. 5. Marssnön (Orchestration by Jussi Jalas)
Violin Concerto in D Minor, Op. 8: I. Allegro
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Violin Concerto in D Minor, Op. 8: II. Lento ma non troppo
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Violin Sonata, Op. 18: II. Improvisation. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40d70f805723e42cb20be41a9d5edb508d32a9cd92cfb10d7883feac762ef77. 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/DEN962530405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b4c2e7755ba88173655908fe6d872ed4d9cc885c7e45c64326013aa8f97f7d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN962530407.
Piano Quartet in C Minor, Op. 13: II. Scherzo. Presto
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Piano Quartet in C Minor, Op. 13: III. Andante
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Capriccio, Op. 85: Sextet, TrV 279a: II. Fig. 2 - Live
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Metamorphosen, TrV 290 (Version for String Septet, Realised by Leopold): II. Etwas fliessender - Live
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Metamorphosen, TrV 290 (Version for String Septet, Realised by Leopold): III. Agitato - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa382e222f9f05d33e42b5256b371a5306b02c8c1509ddbe7c0d455d453df94d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEN962530417.
Metamorphosen, TrV 290 (Version for String Septet, Realised by Leopold): IV. Più allegro - Live
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Metamorphosen, TrV 290 (Version for String Septet, Realised by Leopold): V. Adagio, tempo primo - Live
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Ein Heldenleben, Op. 40: IV. Des Helden Walstatt "Battle Scene" - Live
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Violin Concerto in D Minor, Op. 8: III. Rondo. Prestissimo
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