Konzertvereinigung Wiener Staatsopernchor
thumb|upright=1.2| The Konzertvereinigung Wiener Staatsopernchor is an Austrian mixed choir of classical music and is formed by members from the Chor der Wiener Staatsoper. History In 1927, Viktor
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 0x3543915fa59586319e6d876bdc377d91e4783473e7e5b9eb1a1f7ed1b9eb4543. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8aa9c0a0-fb3b-42c2-bd08-794ab99a4442.json and https://artists.proofprofile.net/proofs/artist/8aa9c0a0-fb3b-42c2-bd08-794ab99a4442.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Symphony No. 25 in G Minor & Requiem in D Minor (Live)
Mahler: Symphonies Nos. 1 - 10 & Kindertotenlieder
Symphony No. 2 in C Minor "Resurrection": IV. Urlicht. Sehr feierlich, aber schlicht
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 0xc0a87ab8594bb33238595c6cd31a058ad8764fcaf8117a4cf36c7ae887ef2f73. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USSM18300561.
Die Entführung aus dem Serail, K. 384: Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b36937f236a9e00d71df8bb3ef9f8bb958a742b1a8fac7f6d0e44d81179f74. 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/USSM10107462.
Die Entführung aus dem Serail, K. 384: Nr. 12 Arie: Welche Wonne, welche Lust
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905fa475b5d535d77409327546b39bd77a1ccfdee77e249422ad5062c04da7f9. 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/USSM10107482.
Die Entführung aus dem Serail, K. 384: Nr. 2 Lied und Duett: Wer ein Liebchen hat gefunden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c58c4fde097c1bace3b8b3e2227d8b1af7e969e5dbfaa49f6ebd371845529d4. 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/USSM10107464.
Die Entführung aus dem Serail, K. 384: Nr. 3 Arie: Solche hergelauf'ne Laffen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c35d0ce91d25e49e6aef6af53471799cdaaface4dab178dff5346ed9b0f677. 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/USSM10107466.
Die Entführung aus dem Serail, K. 384: Dialog: Geh'nur, verwünschter Aufpasser
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96581b01fe087f2bfe3afdfdb6e1ce81d82f78c524e603f5d71c06f1fb62bbc5. 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/USSM10107467.
Die Entführung aus dem Serail, K. 384: Nr. 5b Chor: Singt dem grossen Bassa Lieder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff5cefe241ef4bfe0d66141e52a18bf4488bbb4b431ca0202aef375ae035ba7. 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/USSM10107469.
Die Entführung aus dem Serail, K. 384: Nr. 16 Quartett: Ach, Belmonte! ach, mein Leben!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177b4d8fa3697724d3102bc40b566869393e0b05e0c28b54b7e673910f6f1821. 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/USSM10107488.
Die Entführung aus dem Serail, K. 384: Nr. 8 Arie: Durch Zärtlichkeit und Schmeicheln
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc175c737dbec2c0e8d49b6d51537b617c3a0adc80648f4bff3b549026409505. 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/USSM10107475.
Die Entführung aus dem Serail, K. 384: Nr. 20 Rezitativ und Duett: Welch ein Geschick!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f8b166edec8bce0ab53281444da6536c13ad3409a0b4118923df56290d1d7e. 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/USSM10107496.
Die Entführung aus dem Serail, K. 384: Nr. 10 Rezitativ und Arie: Welcher Wechsel herrscht in meiner Seele...Traurigkeit ward mir zum Lose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd033fbcee1f141ce6f2bbc83a37d50d97b75ff194560e47dd76eaf20de9067d1. 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/USSM10107478.
Die Entführung aus dem Serail, K. 384: Nr. 11 Arie: Martern aller Arten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5adb444b306832b7fd664d67fe39875012cb69c783a720f44e011ad5967fa5a. 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/USSM10107480.
Die Entführung aus dem Serail, K. 384: Nr. 21b Chor: Bassa Selim lebe lange!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad5e429596d104363b6843996c4074a0d04b8939e3893a83b497af8534c2b64. 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/USSM10107499.
Mahler: Symphony No. 2 – Bruno Walter, Wiener Philharmoniker (Toblach Ausgabe)
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand" (Live)
Mahler: Symphony No. 2 in C Minor "Resurrection" (Live)
Johann Strauss II: La chauve-souris (Les indispensables de Diapason)
Mozart : "Great Mass" in C, K.427 (417a)
Mozart: Mass No. 18 in C Minor, K. 427 "Great Mass": V. Domine Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b51a4f80c0358794affd9ed3f8dd410c20ebbf3a40b4a592c048fdb107a94d9. 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/DEA808500305.
Mozart: Mass No. 18 in C Minor, K. 427 "Great Mass": I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0621880f426c374c6bbf18ea1e87065c7268af0731b11694189ad9ddd9b7eaeb. 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/DEA808500301.
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
Mozart: Mass No. 18 in C Minor, K. 427 "Great Mass": II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e7b00e5398ff77e048aab17130ea122bb13b4b983e9f5299d1b42f5d753282. 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/DEA808500302.
Mozart: Mass No. 18 in C Minor, K. 427 "Great Mass": VI. Qui tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afb424d5c6d91c23ddb3435f3a5bf188afdb986b47bf3376fac43070334e24b. 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/DEA808500306.
Mozart: Mass No. 18 in C Minor, K. 427 "Great Mass": XII. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ea9e177dc47fb6f0845aa94ab398c11b9ad818b8f3c98ae4a2af22d9307b6c. 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/DEA808500312.