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 0x645030fe6e58beafdf6adc1cab064c6646b76661470f40ce200f7a22731d3cc4. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e30dc3b-2432-48da-8cfa-b2429d98ea02.json and https://artists.proofprofile.net/proofs/artist/9e30dc3b-2432-48da-8cfa-b2429d98ea02.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alceste, Wq. 44 (Excerpts): Vivez, aimez des jours
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 0x317dfa401889bc8665948678b4bcfaa32b23e19e98cf194106aca69471b43250. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB952020013.
Orfeo ed Euridice, Wq. 30 (Excerpts): Chiamo il mio ben così
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98175043ebb43c90c9de88341e8e558f1e40e4ce7ab5b3647e32f2bcd42db1e. 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/DEB952020011.
Orfeo ed Euridice, Wq. 30 (Excerpts): Vieni appange il tuo consorte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bc8bcb0f9dfe4460047b37ba7b0b43157e68fc44a35af2ca411026bf977ed2. 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/DEB956439132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482055020280374c348d75c42696dc2be318a3f98a65510c482f78542149f883. 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/DEB958202721.
Iphigénie en Tauride, Wq. 46 (Excerpts): O Diane, sois-nous propice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4344e3a331a9c8ab11ead4fd1a6eae712b396b719826599569c8648532db4d39. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEB952020009.
Iphigénie en Tauride, Wq. 46 (Excerpts): Les Dieux longtemps en courroux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0899a6f23f8e5001004ad1226b05c03a2523e51f7803ec671a634267548f91. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB952020010.
Le cinesi, Wq. 18 (Excerpts): Son lungi e non mi brami
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d913e9cf6b50edb390a5a0c8d560b907f4b6c3927e50756b6c74290930da50c. 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/DEB958917805.
Le cinesi, Wq. 18 (Excerpts): Voli il piede in lieti giri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1a77ca2cc02daa2ca95c2bda6b54bde1a646e8da050eb04e949c8d1b9c2e35. 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/DEB958917811.
Pfitzner: Lieder (Complete Edition, Vol. 2)
Schoenberg, Stauss & Debussy: Ausgewählte Lieder
Haydn: Scottish Songs, Trios in C Major & G Major & 6 Original Canzonettas
Beethoven: Irish, Welsh & Scottish Songs
Copland: Appalachian Spring - Poulenc: Gloria - Blacher: Variations on a Theme of Paganini for Orchestra
Jugend: Musik für Flöte, Klarinette, Horn und Klavier in B Major, Op. 139a
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc654b4e1a4aa5368b9e0e75b67ac1874b5abc87c0bef9ca872fcbbc327303fa7. 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/DEW740727020.
Loewe: Lieder & Balladen (Complete Edition, Vol. 17)
Strauss, R: Die Frau ohne Schatten, Op. 65, Act III, Scene 1: "Mir anvertraut, daß ich sie hege" (Barak, Barak's Wife)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4218794875f69008db91bd891b1649c0e948b42513ca0d82797a699b6625c1c1. 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/GBAYC8703273.
Strauss, R: Die Frau ohne Schatten, Op. 65, Act I, Scene 2: "Dieb! Da nimm!" (One-Eyed Man, One-Armed Man, Hunchback, Barak's Wife, Barak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf903e9fe3845d3aef7b7584c11ecc1acf36e75ae7990b1bbd2152c5bcb784a15. 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/GBAYC8703246.
Strauss, R: Die Frau ohne Schatten, Op. 65, Act I, Scene 2: "Sie aus dem Hause, und das für immer" (Barak's Wife, Barak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334029107f7aa7128a09ace1bfc1e9f8043f7da3fb8d6fcf690734d92e88c463. 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/GBAYC8703247.
Strauss, R: Die Frau ohne Schatten, Op. 65, Act III, Scene 3: "Vater, bist du's?" (Empress)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad349bd79afddb447680a3de62f3f986675fd1c49744651c97b4bf5970e8d57c. 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/GBAYC8703280.
Strauss, R: Die Frau ohne Schatten, Op. 65, Act I, Scene 1: "Wie soll ich denn nicht weinen?" (Voice of a Falcon, Empress, Nurse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6defa1b19857f7bd4815a80ea1a612cb49fa79dc0fccd55aa768dc2b6a87fb9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBAYC8703243.
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
Strauss, R: Die Frau ohne Schatten, Op. 65, Act I, Scene 2: "Doch ich armes Weib, ich hab' keinen Spiegel!" (Barak' Wife, Nurse, Maids, Chorus, Empress' Voice, Apparition of a Youth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a7b18ccc1829c13c3ecc50ca611df12dea29f672f38b57362193dde09981b6. 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/GBAYC8703250.
Mozart: Complete Edition Vol.12: Arias, Lieder etc
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db8ee29cf0d251813f630c87d37d0f59b6291207f58d0273de0a68a2b5ac16. 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/DEF057902060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd18412d71bb0000295aa85181e7294dd50a2c91bfbd1885109cbd9a89a59c8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEF058104390.
Mozart: Arias, Vocal Ensembles & Canons - Vol.3 (Complete Mozart Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4c2b532ae473ceb68f94a451ba690bb3685a3b31b8798155cd10ee6fc255d9. 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/NLA508603817.
Der Fliegende Holländer, WWV. 63, Act II: Summ' und brumm', du gutes Rädchen (Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823164bb1f16d16ac789e2d825a2b142372b359203c139752559f73c73f92e06. 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/DEA340702111.
Mozart: Arias, Vocal Ensembles & Canons - Vol.2 (Complete Mozart Edition)
Die Zauberflöte, K.620 / Act 2: "Pamina, wo bist du?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd241e8818fdb97c55d8d9e86d22d9936e499ef97435f5ad5e73eb9996f860513. 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/DEC628600580.
Don Giovanni, K. 527 / Act 1: "Là ci darem la mano"
Orchestra of the Royal Opera House, Covent Garden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeafa09b6bd451a7ed18aa28e87e7e193e2835faa796fc8dd2d7b475d4dfdbd. 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/NLA507301108.
Ariadne auf Naxos / Prologue: Orchestral Introduction
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082862fe350448736889cb9aa40634ee8deb8840a940056be69f743464f4f6cc. 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/NLA508402901.
Ariadne auf Naxos: "Die Dame gibt mit trüben Sinn" - "Wie sie sich schwingen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa106e6d114634d6032d448c92b782b18de976b6ad46622c41d03ef5388a45c69. 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/NLA508402913.
Ariadne auf Naxos: "Hübsch gepredigt! Aber tauben Ohren!" - "Eine Stör- rische zu trösten"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf747d0dda4c023e6ec7053ff96ef81b58bcf7e3afe7acae63176f5320ad099f. 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/NLA508402915.
Ariadne auf Naxos / Prologue: "Meine Partner, meine erprobten Freunde!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba580014fe04558f7eb0cfca8cb742b7f00608cf17367aabeea6853b7819154. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:01:39Z), 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/NLA508402904.
Ariadne auf Naxos / Prologue: "Sein wir wieder gut" - "Musik ist eine heilige Kunst"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7df615bce3c0a624cdcef8e90e98eaa8ba5253dd2fb55dad95bfecf787b561. 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/NLA508402907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca1c609b79d66281975d8e6521a04a40deb0fad32e1f934e2a6702438cd74ae. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLA508402908.
Ariadne auf Naxos: "Ach! - Wo war ich?" - "Ein Schönes war"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485eb501b96001d522d160c9cba46967e25f56680c82524c36790c72efbd04f6. Chain 2 (Bitcoin): anchored in block 957013 (2026-07-07T08:31:11Z), 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/NLA508402910.
Ariadne auf Naxos, Op. 60 / Opera: "Es gibt ein Reich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83909e16f0fb253e79313cb337679663398645c64dd4b59a14af22e94f572d7e. 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/NLA508402912.
Ariadne auf Naxos: "Ein schönes Wunder!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcca626e3d62dbd1f0d37066c16b47414277debcb4402905861110afe1f32e6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NLA508402916.
Ariadne auf Naxos: "Circe, kannst du mich hören?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172d0d7b59e9b6bc84870f470f5f74a3574dce8f96c529f0942cf5e4e5a021d7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLA508402917.
Ariadne auf Naxos: "Gibt es kein Hinüber?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89abc6c43c68865f276c33e9ae19258aa8373f712cb8c3f9b29c6437cc2233e2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLA508402919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a5de4ad7d26e8cb9728416cf5df0a55a4332ea36ef21cddc793f462061a0d9. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/NLA508402909.
Ariadne auf Naxos: "Lieben, Hassen, Hoffen, Zagen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8299f0f7dcf2124428c5a0250061d254a69a949f756374dd5926633f7b012fa7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLA508402911.
Pfitzner: Lieder (Complete Edition, Vol. 5)
Pfitzner: Lieder (Complete Edition, Vol. 1)
Pfitzner: Lieder (Complete Edition, Vol. 3)
Pfitzner: Lieder (Complete Edition, Vol. 4)