thumb|280px|Friedrich Kuhlau, pastel by Christian Horneman from 1828 Friedrich Daniel Rudolf Kuhlau, sometimes written as Frederick Kulav, (11 September 1786 – 12 March 1832) was a Danish pianist and
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 0x887d21f7f79efdc82c299bf4d4ec5fed0348806e9be02e016cea2c4032a139a1. 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/71f99757-7d38-4f37-87c5-2bda7a737081.json and https://artists.proofprofile.net/proofs/artist/71f99757-7d38-4f37-87c5-2bda7a737081.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kuhlau, F.: Flute Sonatas - Opp. 69, 79, 85
Kuhlau: Flute Quintets Op. 51, Nos. 1- 3
Friedrich Kuhlau - Piano Works Vol. 2 - Les Charmes De Copenhague
Elverhoj (The Elf Hill), Op. 100: Act I: Overture
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 0x80bffc194a2a6054a4c4758b2ffb3709f89ee66bb651ac9b298919bc21569b7f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DKFAA9601901.
Kuhlau: Sonatas for Flute and Piano (Complete)
Kuhlau - Piano Works Vol. 3 - Grosse Sonate in B-Flat, Opus 30 – Rondos Und Varoationen Über Beliebte Opern Themen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53427c39e1c71cfaaefb3966e3f16644b1b1cc845afd1eb5bfee34e043cbbd90. 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/GBLWD9809508.
Kuhlau - Piano Works Vol. 4 - Fantasias on Swedish Folk Songs and Dances – Sonatas Opus 26
Kuhlau, F.: Piano Sonatinas, Op. 20, Nos. 1-3 / Op. 88, Nos. 1 and 3 / Op. 55, Nos. 4 and 5 / Op. 60, Nos. 1 and 2
Friedrich Kuhlau: Sonatas, Variations & Rondos, Vol. 2
Friedrich Kuhlau: Sonatas, Variations & Rondos, Vol. 1
The Complete Kuhlau Flute Duos and Divertissements, Opus 10, 102, 68
Play It - Study Album - Piano/ Klavier; Friedrich Kuhlau: 3 Sonatinas in G Major / G-Dur, Op. 44, No. 1 (Piano Four Hands / Klavier Vierhändig)
Kuhlau: Piano Sonatas, Op. 59 / Piano Sonatinas, Op. 20
Piano Sonatina in G Major, Op. 55, No. 2: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc514b7cfc76f5bcb8ecb92ec86a212cc1342b18cf00243bed924c1e043dba02f. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/HKI190782803.
Piano Sonatina in C Major, Op. 55, No. 3: II. Allegretto grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802bbfcdb7adc301df3579d9e2a33c2f7346f45fd735655d40f8b9ef2c910700. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HKI190782807.
Piano Sonatina in F Major, Op. 55, No. 4: I. Allegro non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd670d8b432242eac2774b608f6041c8dfd9c49908a9e6fe92b7a5f6fbf5f72fb. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/HKI190782808.
Piano Sonatina in F Major, Op. 55, No. 4: II. Andantino con espressione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fbf7ab6087fe67cd7f780389473585da8ceea39246b1ca25bd04dce276579a. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:57:23Z), 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/HKI190782809.
Piano Sonatina in D Major, Op. 55, No. 5: II. Vivace assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33ab3bd16e2dbfc41e383649b348473e3e748d791ff6f178f9c3a1682d71491. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:52:24Z), 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/HKI190782812.
Piano Sonatina in C Major, Op. 88, No. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725c3f567f2638b164c9b4c44a192b0f4dea909b1fd8feec03763a2a4eb6ebe0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/HKI190782815.
Piano Sonatina in C Major, Op. 88, No. 1: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f38edbb8e056a163ccd96e8b038e1502e683786d99960fb3406d513efa720b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HKI190782816.
Piano Sonatina in G Major, Op. 88, No. 2: I. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e4269fd4d8c2029849e0fc372f5681b8e062921f96a17b2128bbd18a365e51. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:09:36Z), 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/HKI190782818.
Piano Sonatina in A Minor, Op. 88, No. 3: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b9c6d6ec1268a430b79765bb430dfb230c0fbac943240dbf8c0627235b1e97. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/HKI190782822.
Piano Sonatina in A Minor, Op. 88, No. 3: III. Allegro burlesco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433f2138eb06c843a0598599e2f1e3ac06926c34c5c6becd29f640378a917b67. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HKI190782823.
Kuhlau: The 19 Sonatinas for Piano (Sonatines, Sonatinen)
Kuhlau: Fantaisies & Divertissements for Solo Flute
Elverhoj Overture/Concertino for Two Horns/Piano Concerto
Kuhlau - Piano Works Vol. 3 - Grosse Sonate in B-flat, Opus 30 – Rondos und Varoationen über beliebte Opern Themen
Everhøj Suite Op.100, Concertino for Two Horns & Orchestra Op.45, Piano Concerto in C major Op.7
Friedrich Kuhlau: Fantaisies, Variations & Caprices for Solo Flute - The full work for solo flute - The Art of Flute Alone
Kuhlau: Sonatina in C Major, Op. 88 No. 1: II. Andantino
Kuhlau: Sonatina in C Major, op. 20 no. 1, I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160e48aac1db58556b5ebdec1d9a102b2a2595ed64eec8714910fce8368214ed. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZES92155766.
Kuhlau: Sonatina in C Major, op. 20 no. 1, III. Rondo: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7ec91b6ef8363c09784e118b0d9caf37080e5a5be28b49d8520df3fb037b4e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:51:02Z), 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/QZES92155768.
Kuhlau: Sonatina in G Major, op. 20 no. 2, III. Allegro Scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6013697fc37fa41a32d8933d0d16ee0d3196be5620f464edc0b07295e6a13f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZES92155771.
Kuhlau: Sonatina in F Major, op. 20 no. 3, III. Allegro Polacca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eca3fea77aa0c9e1bc561e71a08c614b1ce1781c8b4be3493d976fe92f8827. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZES92155774.
Kuhlau: Complete Sonatas for Flute & Piano
Friedrich Kuhlau: 3 Duets for 2 Flutes Op.10 (1810) Claudio Ferrarini & Eszter Vereszki flutes
FRIEDRICH KUHLAU: 3 DUETS FOR 2 FLUTES, OP. 39
Piano Sonatina in C Major, op.55, No.1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63efeb1af2f7af00294201b817a9d85e6c8556c67bd4646f09c4e586724292e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNWV2298264.
Piano Sonatina in C Major, Op.55, No.1: II. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf49756e2ea84e12aef91e991e8a9b9b8f92bb9b58013285dd4c19ac6649c8e5. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZNWV2298265.
Kuhlau: Complete Piano Sonatinas, Volume 1
Kuhlau: Sonatina in C Major, Op. 20 no. 1, I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160e48aac1db58556b5ebdec1d9a102b2a2595ed64eec8714910fce8368214ed. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZES92155766.
Kuhlau: Sonatina in C Major, Op. 20 no. 1, III. Rondo: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7ec91b6ef8363c09784e118b0d9caf37080e5a5be28b49d8520df3fb037b4e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:22:42Z), 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/QZES92155768.
Kuhlau: Complete Piano Sonatinas, Volume 2
Easy Variations on an Austrian Folk Song, Op. 42: No. 1 in G Major
Friedrich Kuhlau - Flute Trios No. 2 & 3, Opus 86
Friedrich Kuhlau - Trios No. 2 & 3, Op. 86
库劳小奏鸣曲 古典音乐纯音乐 世界名曲轻音乐
Kuhlau: Sonata Op. 60, no. 1 in F Major, I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c536e525e0d429edd5339cffd65d6ff4efe555e9023906b8345c6239b7709b0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6H2377843.
Kuhlau: Sonata Op. 60, no. 2 in A Major, I. Allegro con Spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31265a1f83dc554c9c7d559cc015306a1f18f1a0e4c3f9aa56c831bfbc64d5c5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6H2377846.
Kuhlau: Sonatine No. 2 in G Major, Op. 88
Kuhlau: Sonatine No. 1 in F Major, Op. 60
Kuhlau: Sonatine No. 4 in F Major, Op. 88
Kuhlau: Sonatine No. 1 in C Major, Op. 88
Kuhlau: Sonatine No. 3 in A Minor, Op. 88
Kuhlau: Variations for Piano Op. 18, 22, 25 & 35
Grand Flute Quartet, Op.103 I. Andante maestoso, Allegro assai con molto fuoco (Live)
Kuhlau: 3 Flute Duets Op. 10 & Grand Trio Op. 119
Vårfavoriter - Sånger om våren och kärleken
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf226690af1eccdd7c92f684812b5e9ae25304de59805ec2d8abd8b3774cd2d05. 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/HKI190567102.