Karel Ančerl (11 April 1908 – 3 July 1973) () was a Czech conductor and composer, renowned especially for his performances of contemporary music and for his interpretations of music by Czech composers
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 0x87a11c83efadf4073b4cd70c124a2cc3a25da85346591928f91a33e84ed44b44. 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/c4afd24c-9b7f-4bc3-aab9-000d19925371.json and https://artists.proofprofile.net/proofs/artist/c4afd24c-9b7f-4bc3-aab9-000d19925371.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carl Maria von Weber: Invitation to the Dance, Overtures
Janácek: Sinfonietta, 4 Opera Preludes, Taras Bulba
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 0xf77e184a16c197ecb24d1292fd663af523e63eba121527c38e4b500090f1cac3. 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/USX761938001.
Sviatoslav Richter: Great Piano Concertos (Live)
Sviatoslav Richter Plays Piano Concertos
Historical Mahler, Vol. 9 (Remastered 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f652758eef18cbd274c3b36216f20268746795f59b3b7ed90c935e0c1e57549. 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/CZD946800312.
Dvořák: Ouvertures, Symphonic Poems & Symphonic Variations
Prokofiev & R. Schumann: Piano Concertos (Live)
Double Concerto for Two String Orchestras, Piano and Timpani, H. 271: I. Poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ffa9eeb25477022f5fbfe0ceb15025c5d7e2f79b0bbdc6a6b646635222c632. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FROV65838901.
The Parables, H. 367: III. Poco allegro - Moderato - Poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0a2988b1d8121dcd40b37481173f6133dab0b3480ae847642bfe9ce7244576. 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/FROV66238922.
Dvořák: Complete Slavonic Dances (Remastered 2023)
Dvořák: Symphony No. 9 in E Minor "From the New World" - Tchaikovsky: Piano Concerto No. 1 in B-Flat Major (Live)
Karel Ančerl dirige Haydn (Symphonie n° 92), Franck (Symphonie en ré mineur)
Karel Ančerl dirige Dvořák : Concerto pour piano / 1964 et Symphonie n° 7 / 1968
Karel Ančerl dirige : Mozart (Eine kleine Nachtmusik), Mendelssohn (Reformation) et Schumann (Symphony n° 4) (Recorded in 1968 - 1969)
Karel Ancerl dirige Beethoven : Symphonie n° 6 et Symphonie n° 8 (Recorded in 1968 - 1972)
Tchaikovsky: Piano Concerto No. 1 in B-Flat Major, Op. 23, TH 55 - Rachmaninoff: Piano Concerto No. 2 in C Minor, Op. 18
Pyotr Ilyich Tchaikovsky: Piano Concertos Nos. 1 & 2
Bartók: Concerto for Orchestra & Viola Concerto
La Gran Música Vol 13 - Capricho Español y Capricho Italiano
La Gran música Vol 13 : Capricho español-Capricho italiano
Dvořák: Symphony No. 9 - Smetana: Vltava
Brahms: Double Concerto for Violin and Cello in A Minor, Op. 102 - Dvořák: Violin Concerto in A Minor, Op. 53
Dvořák: Symphony No. 9 "From the New World", My Homeland & In Nature's Realm
Stravinsky: Petrushka, Igor Stravinsky vs. Karel Ancerl (Compare 2 Versions)
Mahler: Symphony No. 1 "Titan", Bruno Walter vs. Karel Ancerl (Compare 2 Versions)
Mussorgsky: Pictures At an Exhibition Prokofiev: Piano Sonata Nos. 7 & Piano Concerto No.1
Prokofiev & Schumann: Concerto for Piano and Orchestra
Beethoven: Symphony No. 6 / Martinu: Symphony No. 5
Tchaikovsky: Piano Concerto No. 1 & Grand Sonata