Ernst von Dohnányi (Hungarian: Dohnányi Ernő, ; 27 July 1877 – 9 February 1960) was a Hungarian composer, pianist and conductor. He used the German form of his name on most published compositions..
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 0x965d68787e27a8539c04a103bdb82e8d05983ede54d49e0cb387d0e581a77963. 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/90768c0e-157d-4b28-8a26-a94d3d7ea839.json and https://artists.proofprofile.net/proofs/artist/90768c0e-157d-4b28-8a26-a94d3d7ea839.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Dvořák, Milhaud & Prokofiev: Cello Concertos - Dohnányi: Konzertstück, Op. 12 - Fauré: Élégie, Op. 24
Fauré: Élégie, Op. 24 (Orchestral Version)
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 0xaa4a9a6ac321c93bb698d5f34e5f10de98dd1fa69763bd61dc3c28214c32f09c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1400322 — a six-check JSON result.
Dvořák: Cello Concerto in B Minor, Op. 104, B. 191: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30deff234df3d7932fa2071e23049c5567594d9d543887837bcfcef9b9230b65. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC5600048 — a six-check JSON result.
Dohnányi: Konzertstück for Cello and Orchestra in D Major, Op. 12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c091adb64cb283aff808b626ff4ed5242fa69a0e30f5793eb566456f5f4505. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0802530 — a six-check JSON result.
Oubliée. Heritage Piano of Liszt, Chopin & Rachmaninoff
Waltz, Op. 70, No. 1 in G-Flat Major (Posthumous) - Welte-Mignon 1465
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cf39067aec26ef27d78a2251da0b92c29584407e565b62c9ac89c773ad5153. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82402284 — a six-check JSON result.
Romances, Op. 21: No. 12, 'How Painful for Me' (Arr. For Solo Piano by A.Schaefer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49451881b099998c32ac89bba1e1aa120d043cf94d0822179cb7dcc9de69c79. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82401194 — a six-check JSON result.
Preludes, Op. 23: No. 5 in G Minor - Triphonola 51661
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409d3f4f80f9eaa37a332d59af4cae16a67ce329294b3810f2f7be4ef9f6b1a5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82319983 — a six-check JSON result.
Dohnanyi, E.: Violin Concertos Nos. 1 and 2
Piano Pieces, Op. 76: No. 2, Capriccio in B Minor - Welte-Mignon 497
Home. Beethoven, Mozart and Brahms Piano Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5678a62020acc24be6c9feae5f8fb5c409129ce5098e12eb92db097f8c8cf59. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82313472 — a six-check JSON result.
Ruralia Hungarica, Op. 32b: Andante rubato, alla zingaresca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cda9467836e67cce9b6135d0081694d867f7e0ab9b55d2f9d69b6259b6eac9a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130839020 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523038ddbfd3ce708f26c2457c7a91aceed6bcdd8b15bf38241b50528adc5937. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130839030 — a six-check JSON result.