Libor Pešek (22 June 1933 – 23 October 2022) was a Czech conductor. He was among the most famous conductors of his time, working regularly across Europe as chief conductor of orchestras in Prague, bu
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 0x094aa4b6abb243792e784529c3489e516759f8562290b99269e976e60da91e08. 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/b47da1f6-ec8a-4cdf-9537-cf7a195f7807.json and https://artists.proofprofile.net/proofs/artist/b47da1f6-ec8a-4cdf-9537-cf7a195f7807.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Suk Ripening, Praga, Epilogue, Fairy Tale
Blue Edition - Beethoven: Piano Sonatas Nos. 1, 12 & Piano Concerto No. 5
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 0xb3a9ddb69f0d3f6a0905b9dcc05e4a504ce6fad6783c2457b7716b31e97fc54d. 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/HKI199827005.
Overture (Suite) No. 3 in D Major, BWV 1068: II. Air, "Air on a G String"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf955f22e6ebc8f9db4ae8b99b0d606c7aa348ab6f60823a0ef7aa7031cf9f393. 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/DEAD60901011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c798131aee96e367f3a27b1eed5461ef6eec1c7029da320aa58923480f29bb6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEAD60901035.
Holberg Suite, Op. 40: I. Praludium (Allegro Vivace)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9925de65feda55e976fb00b1a6e70f7ada6759c0567986acc0cdcc0c8db4ea. 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/USSJ10805462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f35085b9bd407ba5a71e3638ffa6da68a088c98d4d143c87d224947dc0116bd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA560947157.
Divertimento No. 1 in D Major, K.136, I. Allegro
Uplifting Classical - Music to energize your mood
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235a762ae5afa55a81e6b0835fdd82d48c21b272b7ecfd1cea9ebc0e99a6165a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEA580600507.
Symphony No. 7 in A Major, Op. 92, II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72324255722807984e4abb41df2e14640af056d8ab3f645008b875b4557a7eb8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEA580600223.
The Young Person's Guide to the Orchestra (Variations and Fugue on a Theme of Purcell Op. 34): Theme: Allegro maestoso e largamente (full orchestra - woodwind - brass - strings - percussion -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fb0c49edc0006b55a347715cf2621fea7316f0ac240851a658ad1f809d4722. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAYC8902572.
Holberg Suite, Op. 40: II. Sarabande (Andante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77149301e4437149a3a0e0a916a88c8c9df6d1439c503caf05ce992bdf811096. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/USSJ10805463.
Holberg Suite, Op. 40: III. Gavotte (Allegretto) - Musette (poco Più Mosso) - Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dccb46ffbb8968dc478bb1206c039b020572834889254b438ff669a681f053. 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/USSJ10805464.
Holberg Suite, Op. 40: IV. Air (Andante Religioso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedaaa0248a1a6f4bf256633ed743da1d33a23fa495563374eb82e880bb7e3de. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USSJ10805465.
Holberg Suite, Op. 40: V. Rigaudon (Allegro Con Brio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5978a8328d8bd6d6722a173efd89170b78de0c1461a1c506fc585b5582f32367. 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/USSJ10805466.
The Young Person's Guide to the Orchestra (Variations and Fugue on a Theme of Purcell Op. 34): Woodwind
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb6b6e4ce4ccd685220df425edf96aad7bf09b7f88b4be7a839c22a9e5def28. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAYC8902573.
The Young Person's Guide to the Orchestra (Variations and Fugue on a Theme of Purcell Op. 34): Fugue: Allegro molto - Con slancio (L'istesso tempo) (full orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fc3505b2cb5536450fbf3fabeff7bceffdf8bba83423b0f857d1d8d19166aa. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBAYC8902589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f7d908894d77073b910b720197d5452367429b67de81862edd98f5e7326fd4. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBAYC8901406.
4 Sea Interludes, Op. 33a: Sunday Morning
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76aff6903c597fc1f2c1412e0d5bf831e5d65c726bd7a70bbb9587011a64d2a. 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/GBAYC8901407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af2e4d2da233a59269f3cbb143e0ad8c12ff08ed5076039a35e013eceb18124. 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/GBAYC8901408.
Peer Gynt Suite No. 1, Op. 46: II. Aase's Death
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25224cfd090f7786f0f09720af2472a8c4b43ad2b53d6f5795dc3a4de032e9d1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SEWDL0766602.
Smetana: Má Vlast: IV. From Bohemian Woods and Fields
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c2307c045198d09d820566b20a544cf9a49071b53b5a98bfadae4b5e0880c1. 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/GBAYC8901640.
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": IV. Rondo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff4da83f3b77187cd944c44024b9b224557155324389514dcab9d36b5920297. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEA580700055.