Erwin Schulhoff (; 8 June 189418 August 1942) was an Austro-Czech composer and pianist. He was one of the figures in the generation of European musicians whose successful careers were prematurely term
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 0x8dcd9f356d05c58be07a959eb7ffaf26dcd726b8bc92ea7c149c4c876bd406ee. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e5ab4a3-181e-40fe-b04d-95f877c4e703.json and https://artists.proofprofile.net/proofs/artist/7e5ab4a3-181e-40fe-b04d-95f877c4e703.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Erwin Schulhoff & Erich Wolfgang Korngold: String Quartets (Breaking the Silence)
Die Abflussrohre spuckten ihre Eisblöcke wie abgelutschte Bonbons auf den Gehsteig
Schulhoff: Solo & Ensemble Works, Vol. 2
Schulhoff: Suite Dansante En Jazz / Piano Sonata No. 1 / Hot Music
Schulhoff: Symphonies Nos. 1, 2, 3 & 5; Concerto for String Quartet and Winds, WV 97
Erwin Schulhoff: Piano Concerto, Op. 11 & Der Bürger als Edelmann Suite
Schulhoff: String Sextet & Strauss: Metamorphosen
Erwin Schulhoff: Brückenbauer in die Neue Zeit
Schulhoff: Brückenbauer in die neue Zeit
Schulhoff: Complete Music for Violin and Piano
Schulhoff, E.: Double Concerto for Flute, Piano and Strings / Symphony No. 2 / Mautner, M.: United Colours
Schulhoff: Symphonies Nos. 2 and 5 & Piano Concerto
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 0xaa00ff44582a5d61c4d0fea9da3bb00e167e07504d2a1c63bbc5e8da1f30fef5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEB261801274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b59852a89509f5c517cc61d148bfd57045746bb82bdb295b77b5235b7d20639. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEB261801275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d71567075761c992c95ce0816c6c252221d934f46379513a8b099485265d7a. 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/DEB261801314.
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 0x18a5bbed86f4e691dd398d092f332d1644673fa90531baf115e012ea79cec275. 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/DEB261801281.
Schulhoff: Landschaften, Op. 26, Menschheit, Op. 28 & Le Bourgeois gentilhomme
Erwin Schulhoff: Music for Violin and Piano
Erwin Schulhoff: His Complete Piano Recordings
Schulhoff: Complete Works for Violin & Piano
Erwin Schulhoff - Richard Strauss: Six to seven
Schulhoff: String Quartets Nos. 1 and 2 - 5 Pieces for String Quartet
String Quartet No. 1: I. Presto con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8a7316f8bffd87bd1fa51a076c164f6d0ca65e9ce93504f45331f71e03883a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKI190905401.
String Quartet No. 1: II. Allegretto con moto e con malinconia grotesca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d2669045ca3b55601e73213e1e33a712ab3cbbf77b388a13890a6abd9a9fc4. 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/HKI190905402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ec149019a53a28a63d994f966db40ea34688f148306186fbcf02fee3c9a59f. 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/HKI190905405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055da46f72b72ddd0a6fe13216e84852469c40ed31c9259ee38c5ce4c744a0f7. 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/HKI190905408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771a2d447d9bc48fcaf0cd0bfb5429bee916b8db35a54aeaa0f2bccfb30e9f0b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI190905409.
String Quartet No. 2: II. Tema con variazioni: Moderato
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String Quartet No. 1: III. Allegro giocoso alla slovacca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe714a0a4999ad72e42c3db83b17fb631860c053aeb2ee3021c740afcd060739c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/HKI190905403.
String Quartet No. 1: IV. Andante molto sostenuto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778f057d45554e6cb167dd65c6164b19c1ec87f1c2956c77307f46b734fe5ec4. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/HKI190905406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59b383839484a0c93a589b6a5fb63f1906c3834808021049dfc8cee824137fa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI190905407.
String Quartet No. 2: I. Allegro agitato
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Ervín Schulhoff: Chamber Music, Czech Degenerate Music, Vol. IV
Schulhoff, E.: Symphonies Nos. 2 and 5 / Suite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ff74c420fc0e9711320b28368f5f3ae94e5db093eca91a0eca5ac76f289d98. 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/FR7JM1669020.
Duo for Violin and Cello: II. Zingaresca: Allegro giocoso
Composers In Exile - Zemlinsky, A. Von / Schreker, F. / Schulhoff, E. / Ullmann, V. / Hindemith, P. / Schoenberg, A. / Milhaud, D.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9644b8ffaadab9d564a8e71f56ea7da8b5fe04719a1b94f19d6fda51a41945. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US2TL0943806.