Josef Greindl (23 December 1912 - 16 April 1993) was a German operatic bass, remembered mainly for his performances of Wagnerian roles at Bayreuth beginning in 1943. Josef Greindl was born in Munich
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 0x05a461288b6af53ad2c3752835bdf1945fc807710bf39096807d53a47feece74. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2241c5c8-0866-4e15-9214-187009ee65fa.json and https://artists.proofprofile.net/proofs/artist/2241c5c8-0866-4e15-9214-187009ee65fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wagner: Der Ring des Nibelungen, WWV 86 (Live)
Wagner: Tristan und Isolde, WWV 90 (Live)
Wagner: Götterdämmerung by Wilhelm Furtwängler
Wagner: Die Meistersinger von Nürnberg, WWV 96 (Recorded 1953)
Wagner: Die Walküre, WWV 86B (Live Recordings 1958)
J.S. Bach: Magnificat, BWV 243 & Orchestral Suite No. 3, BWV 1068
Magnificat in D Major, BWV 243: No. 5, Quia fecit mihi magna
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 0x43c7b4fbf6f70cb004e21308944f50570eda2229f8be1d8637474306f659a2db. 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/USB8U2005980.
Magnificat in D Major, BWV 243: No. 10, Suscepit Israel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433e6c2b0eb8a8873360e409b57a2a38c1f86ac682ab9ca2246bba531186d377. 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/USB8U2005985.
Orchestral Suite No. 3 in D Major, BWV 1068: IV. Bourrée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec90c5efe87c6e997bfffbd867e3dc3bd53204713976fb9f25cd003b5ee285cc. 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/USB8U2005991.
Orchestral Suite No. 3 in D Major, BWV 1068: V. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c1afa073c7bd04f2a7a5dc6340b8f67cddb8129d6fddabcbbda7171937d49f. 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/USB8U2005992.
Puccini: Turandot (Sung in German) [Recorded Live 1956]
Lohengrin, WWV 75 / Act 2: "Euch Lüften, die mein Klagen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cdc102368f6720e28755e68e178ab61f4154eb81b9d9742ffae5d9a48ac18c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEF056705070.
Tristan und Isolde, WWV 90 / Act III: Mild und leise wie er lächelt - Live at Bayreuther Festspiele / 1966
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7e736321b6dc18c1d54bd1eb7e6a4c686768b960d9b504bd293358a695d364. 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/DEF056630206.
Wagner: Götterdämmerung, WWV 86D (Remastered 2021) [Live at Auditorio del Foro Italico, Rome, 1953]
Martha, Act 1: Chorus "Darf mit nächtig düstren Träumen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb401aa9ddefba1802401971d2a00f05aeab404787ee2793e623b95c2d40f9fa4. 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/NLY331305815.
Martha, Act 2: Volkslied "Letzte Rose, wie magst du so einsam hier blühn? Martha!" - "Herr!" (Lady, Lyonel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418a17c289f13bff04e8954724bf1cbf4847f2b51b1a90f3b440bd57d8de6cab. 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/NLY331305826.
Martha, Act 3: Quintet with Chorus "Mag der Himmel euch vergeben" (Lyonel, Nancy, Tristan, Plumkett, Lady, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa386acec068ade668d408b18ec43bd8d1f6e6176ced1ed7534b34155e0666632. 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/NLY331305835.
Mozart: Die Entführung aus dem Serail, K. 384 (The Abduction from the Seraglio)
Wagner: Der fliegende Holländer, WWV 63 (Live)
Erika Rokyta / Lore Fischer / Thomanerchor und Gewandhausorchester Leipzig / Günther Ramin play: Johann Sebastian Bach: Magnificat, BWV 243
Richard Wagner: Parsifal (Bayreuth 1956)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79dd0d3a21ef6c892451608f9ba14cb5a88cf3df73c4c90b5f0b4c9de7effd3. 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/US2TL0945001.
Wagner: Das Rheingold, Scene 2: "Lichtsohn du, leicht gefügler" (Fasolt, Wotan, Fafner, Freia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ef5f87fed41f5991ff9863b179dcd68d9683ed9f41b0834f41a4d4cd8a3287. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBAYC9004671.
Mass in D, Op. 123 "Missa Solemnis" / 5. Agnus Dei - Adagio: Dona nobis pacem
12 Contredanses, Stage Music & Other Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488f32115b538486061d669ae6f7a7c8afd77e0082889df6f475dbaea958c6c. 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/DEF055500025.
Die Zauberflöte, K. 620: Act I: Arie: Der Vogelfanger bin ich ja (Papageno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ee81aaa65ba1f62accb6f069d633838c5cf71195227d7dd9927285eaf8c67a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US2TL0945005.
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
Die Zauberflöte, K. 620: Act II: Terzett: Seid uns zum zweiten Mal willkommen (Drei Knaben)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319c4a529b6b2fc3158b358a6ba7b1d84933620c037f17ff15e35a871f097595. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/US2TL0945033.
Die Zauberflöte, K. 620: Act II: Finale: Bald prangt, den Morgen zu verkunden - Der, welcher wandert - Papagena! Papagena! Papagena! - Nur stille! Stille! Stille Stille!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48fbe584a5d3ea8a517534e17e58adc79ffa802fae92a0e69ee887fffacf73b. 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/US2TL0945043.
Mass In D, Op. 123 "Missa Solemnis" / 2. Gloria - Allegro vivace: Quoniam tu solus Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dac5835c127b5876e9520849f0033390cd5e567551dde78469d2334d0d5fe80. 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/DEF055500012.
Mass In D, Op. 123 "Missa Solemnis" / 2. Gloria - Allegro vivace: "Amen, Amen, in gloria Dei Patris" / "Quoniam tu solus..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f20728e6e36f4fa1b6efc92dd51295acd74eaa4b427d4a91dc8e929b897f67. 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/DEF055500014.
Wagner: Das Rheingold, Scene 2: "Sanft schloß Schlaf dein Aug'" (Fasolt, Wotan, Fafner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef017aa6d77d05027abb65bc4945ce319cbf6af866e469950d9270b48a1f24b7. 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/GBAYC9004670.
Wagner: Das Rheingold, Scene 2: "Endlich Loge!" (Wotan, Loge, Fricka, Froh, Donner, Fafner, Fasolt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b315b5531ad9c409211e418392cbf81120a350aa89f8d59f7168085e943c2e. 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/GBAYC9004673.