Lisa Della Casa (2 February 191910 December 2012) was a Swiss soprano most admired for her interpretations of major heroines in operas by Wolfgang Amadeus Mozart and Richard Strauss, and of German lie
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 0xf2206c22f9ea21ba00d8e8ca6c3de0e28248d17b53a0996dda4388c110f34b74. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6535b943-98bd-4db2-af7f-94936545c9e2.json and https://artists.proofprofile.net/proofs/artist/6535b943-98bd-4db2-af7f-94936545c9e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le nozze di Figaro / The Marriage of Figaro
Le nozze di Figaro / The Marriage of Figaro: Ouverture
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 0x4a4556ee4578ac863f7c5e4a140b0d7dfbe3e5b06d8b0014b22527cb544156fa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEAD62142101.
Le nozze di Figaro / The Marriage of Figaro: Duettino: Se a caso Madama la notte ti chiama …Or bene, ascolta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed47f0265b4d22ee358959cbdcceeea26b76701add1fe5cd3d4cce096807d63a. 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/DEAD62142103.
Le nozze di Figaro / The Marriage of Figaro: Aria. La vendetta …Tutto ancor non ho perso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7668a3cd70cdd1c228fd9c93e1d76b013841448adf6e071baaaba40f7c82fd41. 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/DEAD62142105.
Le nozze di Figaro / The Marriage of Figaro: Aria. Non più andrai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a366d35e141225d4c3238503f79a8765fa912c3c6ad158afbf5d6bd802e2ae. 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/DEAD62142109.
Le nozze di Figaro / The Marriage of Figaro: Cavatina; Porgi amor … Vieni, cara Susanna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9648717c820dc88ee8de4f2b435708c0125c51d95f7c8322659c11e17e7b44f0. 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/DEAD62142110.
Le nozze di Figaro / The Marriage of Figaro: Signori, di fuori … Ah! Signor ... Signor!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f7e2682d1b3f2f619a3aef7adb1418922f3bcf9b9cc76269a6b730a3a0d7b3. 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/DEAD62142118.
Le nozze di Figaro / The Marriage of Figaro: Recitativo ed Aria Tutto è disposto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe014bd936503c0f2251f9763f752fed715142178fd2b7ab65f303b79f256d4bd. 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/DEAD62142130.
Le nozze di Figaro / The Marriage of Figaro: Arietta. Voi che sapete … Bravo, che bella voce!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf96faaf3720daf0eaadc99af218dea5c70d2b3797ffd04eef77a4896f11ca84. 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/DEAD62142111.
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
Il dissoluto punito ossia Il Don Giovanni
R. Strauss: Arabella, Op. 79, TrV 263 & 4 Letzte Lieder, TrV 296 (Live)
Mozart, Einem, Wagner & R. Strauss: Opera Arias
Mozart: Don Giovanni, K. 527 (Sung in German) [Recorded 1955] [Live]
Wagner: Die Meistersinger von Nürnberg, WWV 96 (Bayerische Staatsoper Live)
Richard Strauss: Der Rosenkavalier (Live)
Gluck: Orfeo ed Euridice (Recordings 1957)
Mozart: Le nozze di Figaro, K. 492 (Live)
R. Strauss: Capriccio, Op. 85, TrV 279 (Excerpts) [Live]
Mozart: Don Giovanni, K. 527 (Recorded 1959)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d577188bf776505fb83f38dc8a7a51749c463e5ea71012344a40a079f219f32. 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/ITCC51102908.
Lisa Della Casa (Wiener Staatsoper Live)
Wagner: Die Meistersinger von Nürnberg, WWV 96 (Live)
Richard Strauss: Four Last Songs & Lieder by Lisa della Casa
Schumann & Strauss: Song Cycles & Selected Songs
Brahms, Schubert, R. Strauss & Others: Art Songs (Live)
Strauss: Elektra, Op. 58, TrV 223 (Live)
Gottfried von Einem: Der Prozeß, Op. 14 (Live)
Strauss, R.: 4 Last Songs / Arias and Scenes from Arabella, Capriccio and Ariadne auf Naxos
Handel: Giulio Cesare & Mozart: Don Giovanni
Mozart: Don Giovanni - The Sony Opera House
Lisa della Casa und Anneliese Rothenberger in Opernszenen von Richard Strauss
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5e33747ab5cd903bdd217adcd8235eacef4a240926f3e2f10c409709b8546b. 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/GBF075741202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1114b9d9c28b117195a8ada9a580e761bf4f26e05f5a3adfb993ff72288d01d8. 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/GBF075741203.
Arabella / Act 1: Er ist der Richtige nicht für mich!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3589030537817191168f5a21136c286d2bed92c7b6a6efd6ee4ed8fd75cceddf. 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/GBF075741205.
Arabella / Act 1: Aber der Richtige, wenn's einen gibt für mich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9896c4642f0bbd7fc56beffd9ce6e99320556a22eaeb4690691481c1bd149cca. 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/GBF075741206.
Arabella / Act 1: Herr Graf, Sie haben Ihrem werten Brief
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e825053bdabb92e38a7239ee2ee8f7e06591d26ac220bb85d8c395b9b8ec84. 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/GBF075741211.
Arabella / Act 1: Das ist der Fall von andrer Art
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fca33ae90fbe045784f420e75a59f1f57f028c8df60e2fca9eb417c394a379. 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/GBF075741213.
Arabella / Act 1: Mein Elemer! ... Nach dem Matteo sehnt sich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0ccc49a12f8f4885aeedcfa1667fcb5cf70a8bd39449ce979ffe382e6e3725. 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/GBF075741214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926d80c2bc41f243944f696a8ee287487e38703ed816a0d40a8d07bb9c6e2ee9. 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/GBF075741215.
Arabella / Act 2: Ich habe eine Frau gehabt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffdf65ebaaa890dab878d5f629157cab4c84c8add7ce1addc951c42e9708138. 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/GBF075741217.
Arabella / Act 2: Sie wolln mich heiraten, sagt mein Vater
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef851d46e1e124cf15a8a3120635d0820d7aba93c335874cd13fad3a26bbf4be. 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/GBF075741218.
Arabella / Act 2: Und du wirst mein Gebieter sein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca6db2c1c84d031ee17a7c892910b7bab35ebdda28c933bf0cd00e62c22d49c. 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/GBF075741219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71468001b4058cdc6091316e817a65431f66367b12bcb46476732f584cea08a4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF075741204.
Arabella / Act 1: Das ist der Schlitten vom Elemer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af096e54bf33ebf86bcf23d110186a166ee7d042f1afd279df1c1a2110ee525. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBF075741207.