thumb| Christian Ehwald (born 1953 in Eberswalde) is a German conductor and academic teacher. Life Ehwald studied at the Hochschule für Musik "Hanns Eisler" with the conductor Horst Förster from 19
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 0xfa7755652944894a34c3742eb67050b6f07cf246df6f45a9faf13ec857203329. 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/e20fb368-b0d4-4363-94e0-570eb8bb1858.json and https://artists.proofprofile.net/proofs/artist/e20fb368-b0d4-4363-94e0-570eb8bb1858.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The 50 Most Essential Pieces of Classical Music
The 50 Most Essential Classics of the Romantic Era
Samson et Dalila, Op. 47, Act II: Mon coeur s'ouvre a ta voix
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 0x0d88250c1ee0f8fdc6ac9b5a45eec5c1c03f76c0dc516f549660b2ac12d0c464. 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/SEWDL6009739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82832ed67678cf1e6948aa91ed4ad28d76ccc515ff8d901546f20c1f8c18935. 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/SEAEP0662140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c419d9f95bc90206503625cd6f49c8802df41712a76eeff652b5b0e1112d910. 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/SEAEI9634060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728cb63d88248f6088edb3c518a54b6b91165f6efd951ebd87de4284be99c00d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEWDL0753111.
Tchaikovsky - Glazunov - Mussorgsky - Glinka: Russian Ballet Music
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Violin Partita No. 3 in E Major, BWV 1006: I. Preludio
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Christmas Concerto in G Minor, Op. 6 No. 8: IV. Vivace - Allegro - Largo
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Swedish Rhapsody No. 1, Op. 19 "Midsommarvaka"
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a91258fadb1426b3a8211abd7c89fb21cb52276dfd14a49cebb1acf29010274. 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/SEWDL0721617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572fb5cfc75df524815cc323cb17159ccab76ce7513658741ea1cf8b7510cb79. 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/SEWDL0501814.
Trois Gymnopédies: I. Lent et douloureux (Arr. by Wolfgang Sieber)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cf8d6c0a9ed645a968f6f4062e45c6fe21afb3b1b07dc77f7e73610ac5abd8. 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/SEAED8650150.
Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": II. Adagio cantabile
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921d7209df489d0baddab4ca4cdc090174c541dc0cdd0405a8d22f5384c69716. 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/SEAED8617170.
Holberg Suite in G Major, Op. 40: II. Sarabande
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The 99 Most Essential Classics of the Romantic Era
Romeo and Juliet, Fantasy Overture, Op. 64a
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My Fatherland, JB 1:112 "Ma Vlast": II. Vltava (The Moldau River)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6a0cf3ca7fc46b0ee16b500381096a0dba5d5395d509ead47cd1ccfce1a2b7. 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/SEAEL9917010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb144f7764cf80bef4160b179d2621813e2b6ba646d562cd38be55c3abdf8a320. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SEAED8500070.
Cello Concerto in E Minor, Op. 85: I. Adagio - Moderato
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Peer Gynt, Op. 23, Act III: No. 13, Solveig's Song
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Piano Concerto No. 2 in C Minor, Op. 18: II. Adagio sostenuto
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Slavonic Dances, Op. 72: No. 2, Dumka (Allegretto grazioso)
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Xerxes, HWV 40, Act I: Ombra mai fu (Largo)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc0fa502d98a8a3e6bd9cd2c57dd8cc6a5dff2d3c98e21117f3972731462e41. 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/SEAEK9940050.
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Canon and Gigue in D Major, P. 37: I. Canon
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d43b68acfdc426fb31d05a3b3b643b433cabf9e5b98f67b528a64255761ab1. 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/SEAEF9270060.
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Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso
Orquestra Sinfônica do Estado de São Paulo
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Most Relaxing MOVIE Music in the Universe
Slovak State Philharmonic Orchestra, Kosice
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Rise of the Masters: 100 Supreme Classical Masterpieces
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Peer Gynt Suite, Op. 55, No. 2: Solveigs Lied
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Alexander von Zemlinsky: Lyrische Symphonie op. 18
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21 Hungarian Dances, WoO 1: No. 1. Allegro molto
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