Ferdinand Frantz (February 8, 1906 in Kassel – May 26, 1959 in Munich), was a German operatic bass-baritone. He was well known in his time for his performances in the operas of Richard Wagner. Fond o
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 0xca8bb4318cc7a1d270015f1a4bfad42c92da0d9d85716c9e6906d19b14a087bf. Chain 2 (Bitcoin): anchored in block 954039 (2026-06-17T03:00:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e4539f7-1f06-42e2-8863-b3820b7c2e64.json and https://artists.proofprofile.net/proofs/artist/3e4539f7-1f06-42e2-8863-b3820b7c2e64.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Wagner: Die Walküre, WWV 86B (Remastered 2021) [Live]
Wagner: Das Rheingold, WWV 86A (Remastered 2021) [Live]
The Blackest Bass: Gottlob Frick Portrait
Die Entführung aus dem Serail, K. 384: Wer ein Liebchen hat gefunden
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 0xeddb3a89cdf90308656b4f16a8dd65c716ede776ca0e8a2ec2ec31a831fe11be. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD61804701 — a six-check JSON result.
Die Zauberflöte, K. 620: O Isis und Osiris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff514413cd1be0a819665a33e8a16fb849ecbf3a8b4d42260d92f27e431f3d9b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD61804704 — a six-check JSON result.
Jägers Liebeslied (Arr. for Bass & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172d3e67b991c710894603d5b2be5c3e904b0251581053c6c883eb84b55be577. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD61804742 — a six-check JSON result.
Wagner: Die Meistersinger von Nürnberg, WWV 96 (Semperoper Edition, Vol. 6)
Wagner: Tristan und Isolde, WWV 90 (Bayerische Staatsoper Live)
Wagner: Die Meistersinger von Nürnberg, WWV 96 (Bayerische Staatsoper Live)
Stravinsky: Oedipus Rex; Strauss: Elektra (Scenes); Kodaly: Hary Janos Suite
Wagner: Das Rheingold, WWV 86a [Recorded 1948]
Richard Strauss: Salome, Op. 54, TrV 215
Dokumente Einer Sängerkarriere - Ferdinand Frantz II
Dokumente einer Sängerkarriere - Ferdinand Frantz
Wagner: Die Meistersinger von Nürnberg, Excerpts (Mono Version)
Wagner: Les maîtres chanteurs de Nuremberg (Mono Version)
Die Zauberflöte, K. 620, Act I: Der Vogelfänger bin ich ja (Papageno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316d2fc1f8b0c64d85e446db5471c96ee14a74670b515ba667e33e048cf39b17. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC628600562 — a six-check JSON result.
Don Giovanni, K. 527, Act II: Il mio tesoro intanto (Don Giovanni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc2291fc68a7d88ad3def0093049078d52441a571d8ba4a19b7c8e760c2aebe. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004425 — a six-check JSON result.
Der Ring des Nibelungen - Metropolitan Opera 1951 Fritz Stiedry
Schwarzer Peter: Ach ich hab' in meinem Herzen
Rudolf Schock mit den Schaumburger Märchensängern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5692069cc29405c4e4b9a966d4a1fe2e81671bd8a85bc0a67444322418e063a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU240824073 — a six-check JSON result.
Bin ich nun frei? Wirklich frei? (Das Rheingold)
Sinfonieorchester des Hessischen Rundfunks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f14147c47698aa4f0ac44a241881605d3cbda97cc6082a6ef27efdb13b3e2c9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130145024 — a six-check JSON result.
Wilhelm Furtwangler Conducts Richard Wagner's Der Ring des Nibelungen (Milan 1950)
Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio - Recorded 1960
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5cf5da5b5167e80d5c14bc5bc7d9e5a488ab33548788c1183ef03214f63278. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055900011 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4092a01f0d5ca14396d3009f86353646130682981dcbadb0e444f00d1894464f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5300716307 — a six-check JSON result.
Wagner: The Very Best of der Ring des Nibelungen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe496b2141dc321f99f81a4e91fe14dcc4b0a00d62907fb16b00af74814abc4b9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8904079 — a six-check JSON result.
Sir Georg Solti - the first recordings as pianist and conductor, 1947-1958
Wagner: Das Rheingold, Scene 2: "Wotan! Gemahl! erwache!" (Wotan, Fricka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab9989a715d5acf5e19457e8a4a431c91ef9ede12cdd6c7f734762bab2b504e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004667 — a six-check JSON result.
Wagner: Das Rheingold, Scene 2: "Um des Gatten Treue besorgt" (Fricka, Wotan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6582f5d38e8ad01a3b960efb15f3a1c660f0d034857354ce901c36e326fc77a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004668 — a six-check JSON result.
Wagner: Das Rheingold, Scene 2: "So schirme sie jetzt" (Fricka, Freia, Wotan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b952d30c617f43882680d4e6aff637b8af73ab3f4f31922bf4eb577157dbc4e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004669 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004670 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004671 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004673 — a six-check JSON result.