thumb|right|Leo van Doeselaar, 2007 Leo van Doeselaar (born 1954, Goes) is a Dutch classical organist and conductor. Leo van Doeselaar studied the organ (with Albert de Klerk) and piano (with Jan Wi
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 0x93064f3ff53dfd8e1a4033d688e0f3015002245dd7b95b93e31d8a0fafbf669f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb33df21-7846-4fed-9544-40234294889a.json and https://artists.proofprofile.net/proofs/artist/eb33df21-7846-4fed-9544-40234294889a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Monteverdi: Vespro della Beata Vergine / Scheidemann: Organ Works
Vespro della Beata Vergine da concerto composto sopra canti fermi: Psalmus 126: Nisi Dominus
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 0x64cd4ab6836d6bca8105af5bff077ed29761f5367ba32c0fa5eb848c662b9cc0. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CAJ720330408.
Cantata "Geist und Seele wird verwirret", BWV 35, Prima parte: No. 1. Sinfonia (Concerto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb367e91cebadfa18c3409e069035c71845909bc2f55b20f87b1ba8548a192726. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BEE022109201.
Cantata "Geist und Seele wird verwirret", BWV 35, Prima parte: No. 2. Aria, "Geist und Seele wird verwirret" (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe68d8f7f704ed7ae45c1a303beab7ba2c041f1f88768f36906bebcc7df5e351. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BEE022109202.
Cantata "Geist und Seele wird verwirret", BWV 35, Prima parte: No. 4. Aria, "Gott hat alles wohlgemacht!" (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef217d591fde1c7d957077faf79abd50d1100adae79c3b814b40a269309be41. 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/BEE022109204.
Cantata "Geist und Seele wird verwirret", BWV 35, Seconda parte: No. 5. Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf659d9d5a97404e1c53a0da02591ca5d7c775b2e8d02d16e9542f2d84ad5e8. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BEE022109205.
Cantata "Gott soll allein mein Herze haben", BWV 169: No. 7. Chorale, "Du süße Liebe, schenk uns deine Gunst" (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3547bbeb32dbe9439b977d2862bd376ad9dd4235bb12a7336e58a165e078e6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022109217.
Stille Klagen: Remorse and Redemption in German Baroque
Trio Sonata in A Minor, BuxWV 254: III. Lento - No. 3 from "7 Trio Sonatas, Op. 1", 1694
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff1947d6d90ce67c80d5d4e896f9b1d8bc6eab4b7aaf4fface16f1c4363ce90. 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/BEE022004003.
Cantata "Mein Herze schwimmt im Blut", BWV 199: No. 8, Aria, "Wie freudig ist mein Herz" (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f27ccab462a62a5300a9e4582b51861cfb8484942da9ddc5005be1ee57dfc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE022004029.
Cantata "Geist und Seele wird verwirret", BWV 35: No. 1. Sinfonia (Concerto)
Een Muzikale Anthologie Der Noordelijke Nederlanden
A Musical Anthology of the Northern Netherlands
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcda1e880cfa1adef2004f00107e275caae876914cc4032d8559c77a3af7c134. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QM7281450549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4765f27eeb1832c7b8bf039dd6c63df16b13346a0f42ce4daf5a5aeaf157aa19. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLHR51003032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2348126a93a8e944301ae725d4bf7e58706c715a6517ae35c21e11b2826e0c. 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/DEY320801001.
Sonata in G Major, BWV 1038: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6635d4bd97d7fe1653d5ee26c4830c85ec5d9283eb025d5d65c1c4213e31c63. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/DEY320801003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff9f1d25f8d12aa5d4ee102b07e51428e065fde8644b947315744cf1ef15526. 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/DEY320801008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849b92919f91c15b2b9eb77c34b15d1a4ab3fe7db3d0fded8a7b48a352d7e5be. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEY320801011.
Sonata in D Major, BWV 1028: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa1b87cb1ab467b72b96969ff166c5dcb2ac56e8a52c397e4c7331d85694d80. 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/DEY320801012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886fb1a474825d866789245cb36edb64bed1eca9e054a5a5d2ff695885610169. 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/NLB150600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f6f942bfb84715ca428f6f8749a061e4aa26073a3d16bc68a1c6f316541eb5. 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/NLB150600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215c742a6065affd127450374ac00c3defc149ccf3697a625697ca7ea2ed2bac. 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/NLB150600055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694650ffb93f2f0d79950c15ee25333d345d57a1e33a1a79f6c31ad927c834cc. 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/NLB150600053.
Live Organ Concerts in the Martinikerk Groningen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf653530038f5ca4479e9abcbe70f275237a080cd7d97abbb06d3648ccf4e011c. 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/NL3UC2100361.
Variations Serieuses, MWV U 156: Variation 9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2241ced7ba6392e9e56e3df5540ccd6fd5a797c8b7983dbbb28b867597eb5b6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEB241485317.
Beethoven: Symphony No. 4 / Ouverture Egmont
Schubert: Flute Variations, D. 802 & Guitar Quintet, D. 96
Introduction, Theme and Variations in E Minor On 'Trockne Blumen' from the Song Cycle 'Die schöne Müllerin', D. 802: I. Introduction
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ece5eb01d4fcfb7232c374839aefe29ff8bcb8a38588c5168cf44a254c54b44. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QMFMG1411262.
Introduction, Theme and Variations in E Minor On 'Trockne Blumen' from the Song Cycle 'Die schöne Müllerin', D. 802: III. Variations I-VII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe694b36a05874e1b3751965f6fde02e40e2c0ea48c9ed4601e4e6ad523c5b0b5. 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/QMFMG1411264.
Prelude and Fugue in E-Flat Major, BWV 552: I. Praeludium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7809f08f0da76c62d2bdfa938b62860c37d37fa3b47dace180cd9f6e754776aa. 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/NLA460711752.
Chorale Preludes from "Clavier-Übung III", BWV 669-689: I. Kyrie, Gott Vater in Ewigkeit, BWV 669
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6970134fe60954fb563676bf551b071b90eace861fd8f1088a6ca58788caf57. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460711755.
Chorale Preludes from "Clavier-Übung III", BWV 669-689: II. Christe, aller Welt Trost, BWV 670
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9d1e35e61efc474f74873e3a6ee02fb8530b4df248341ad2bd887701c41c92. 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/NLA460711756.
Chorale Preludes from "Clavier-Übung III", BWV 669-689: III. Kyrie, Gott heiliger Geist, BWV 671
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10d6460546d117fa61e61488acef91a6df10b4c292b7750e348042c6b2a5fe4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLA460711757.
Chorale Preludes from "Clavier-Übung III", BWV 669-689: VIII. Allein Gott in der Höh sei Ehr, BWV 676
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65150cebb543575de9f26b28a81078d39fd5a670bf988950d2d0f3656a2405a. 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/NLA460711760.
Chorale Preludes from "Clavier-Übung III", BWV 669-689: X. Dies sind die heilgen zehn Gebot, BWV 678
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a8c805677a70b978343a1708468980b1a06b93f348f397ddbcd8e430a8e5dc. 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/NLA460711763.
From Fanfare to Cantilena, 19th Century Horn Music, Beethoven, Schumann, Von Krufft, Rheinberger
Sonata for horn and piano Op. 178 (1894), I Con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0ad1153139bc36c12fbfddfa22acd9abda527fd29960b38b1601f20f7a317a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR0O70709830.
Tabulatuur-boeck van Psalmen en Fantasyen (Selection)
Fantasy in F Minor, D. 940, Op. 103: I. Allegro molto moderato - Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e15506555bec63ea77415b852f3eb9f305a15de401f1d0c1b42c07dc92c3ef. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QMFMF1425547.
Fantasy in F Minor, D. 940, Op. 103: II. Allegro vivace - Con delicatezza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f0647393b2c16b265bca10a4754980eb99522d0b65911c3db429d352e13f6f. 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/QMFMF1425548.
Ravel, Bolero, Rapsodie Espagnole, Ma Mère l'Oye, Fanfare, Music for piano, four hands
Ma Mère L'Oye, IV Les entretiens de la Belle et de la Bête
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bd2686b969f1e0bd542d9b137b2e53a1533837a4a6f247c37dad0cee77bee4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR0O70716160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c2dd4732e1118b35c97bd70c20b2776a16d61247982ddcc110267a6fd5358a. 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/FR0O70716170.
Antonin Dvorak, Legends, Legenden, Légendes Op. 59
George Frideric Handel, Organ Works Vol 2
George Frideric Handel, Organ Works Vol 1
Mariss Jansons Live - The Radio Recordings 1990-2014
Brahms: Symphony No. 1 in C Minor, Op. 68: II. Andante sostenuto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67e3b87c35ea71b47c03a85546012d10998f02bdc86f27a6f6c94e238aa77fd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLG761520232.
Hindemith: Symphonic Metamorphosis of Themes by Carl Maria von Weber: III. Andantino - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc213bc5697281df3fdc241514659a7b05c83f1bf8cd3080b58da7a86a9922c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLG761520226.
Kammermusik No. 1 with Finale 1921, Op. 24 No. 1 for 12 instruments: 1. Sehr schnell und wild
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf361c621386960553e9ca70c0a5774e29190c308c243cf79dab498f07e11404c. 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/GBF079044301.
Kammermusik No. 1 with Finale 1921, Op. 24 No. 1 for 12 instruments: 3. Quartett: Sehr langsam und mit Ausdruck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35afa9bf561c9ba0605baf76548749d78e9b6bc68ad417ca22664892cde1b91. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079044303.
Kammermusik No. 1 with Finale 1921, Op. 24 No. 1 for 12 instruments: 4. Finale 1921: Lebhaft
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d82af9208451331637fa2680a20298ebce890aa9374675225c432206796776. 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/GBF079044304.
Kleine Kammermusik, Op. 24, No. 2, for wind quintet: 1. Lustig. Mässig schnelle Viertel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24a46474d2f3962151878812e9367182ab9fc32b734836a42bd4e8baef27c90. 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/GBF079044305.
Kleine Kammermusik, Op. 24, No. 2, for wind quintet: 2. Walzer. Durchweg sehr leise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f8d2e7d95f9736033174223d85ff898c594b5af25bb16cb4a52a18a1f62d4d. 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/GBF079044306.
Kammermusik No. 5, Op. 36 No. 4, for Viola and Chamber Orchestra: 1. Schnelle Halbe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a13149d8435183c39171e5c3c6f471febce56a837f32a0030d117bc4bc430b. 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/GBF079044323.
Kleine Kammermusik, Op. 24, No. 2, for wind quintet: 4. Schnelle Viertel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55780b30441f9d35210fec0100d8f561ada791ee0ef7a6906b6bbbe08e9a1707. 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/GBF079044308.
Kleine Kammermusik, Op. 24, No. 2, for wind quintet: 5. Sehr lebhaft
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe464e07c292e273514f83c8b18869ad5f91fcb419d9246814dbbf9b7c99f870e. 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/GBF079044309.
Kammermusik No. 2, Op. 36 No. 1 for Piano and Chamber Orchestra: Sehr lebhafte Achtel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35be4f44b4814642e28c756396fa75067d2206d6c0461ee0cd80f3404709e385. 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/GBF079044310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f72084871ee755032d490e1f6a3554e5f90d9c1394d03c383c3068910b224d. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/NLQ661200344.
La Gamme d'Amour: No. 2. Lento en Andante de Complainte et Berceuse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33719f139e759bb53890e7af5a1576dce21620c827aac06905e45bf8d2d0b89. 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/NLHR52102585.
Trois Morceaux pour harmonium, Op. 1: No. 1. Meditation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc117903d0947f12013e9cea367462239a0def9ee013ec3dbd0557f12f8dbfb97. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLHR52102574.
Röntgen: Orchestral, Choral & Chamber Music