Elisabeth Schärtel (6 October 1919 – 24 August 2012) was a German operatic mezzo-soprano and contralto. A member of the Cologne Opera from 1959 to 1967, she performed leading parts at major European 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 0xa59ed96ba987ad7a00c6ee78cd6a01258e09a575d4fc91f2b1c520ba17ca7650. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7eaf8e97-71bf-4718-acaf-871d889ef105.json and https://artists.proofprofile.net/proofs/artist/7eaf8e97-71bf-4718-acaf-871d889ef105.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Wagner: Siegfried, WWV 86C & Parsifal, WWV 111 (Excerpts) [Live]
Wagner: Der fliegende Holländer, WWV 63 (Live)
Wagner: Die Walküre, WWV 86B (Live Recordings 1958)
Johann Strauss, Jr.: Der Zigeunerbaron (Excerpts)
Johann Strauß II: Der Zigeunerbaron (excerpts) - "Operetta Highlights"
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 0x9930c21651b6a8c992fbdb7edbb4fae13ca9a8a09f3f82d6a14bb72290e2469f. 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/NLA506600617 — a six-check JSON result.
Das Rheingold / Scene 1: "Weia! Waga! Woge du Welle!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8cc37992f59c418cb52f929e2fbdf3e1aac24d4f03acebfa12ac3853937ad8. 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/NLA506600618 — a six-check JSON result.
Das Rheingold / Scene 1: "Garstig glatter glitschriger Glimmer!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb28c959c344513d7fd7b69615b8d381d8e41557669175c269891c3c75b16f22. 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/NLA506600619 — a six-check JSON result.
Das Rheingold / Scene 2: "Wotan! Gemahl! Erwache!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147ab461e8b796748c707cfd3fab39a865dfe7dab77f38012b3b03bd1936deb0. 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/NLA506600624 — a six-check JSON result.
Die Walküre / Act 1: "Wehwalt heißt du fürwahr?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4f54f6d7a4daa476fe3498f595fd3f8916361c1ada74f27bb86724d6e91f77. 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/NLA506700074 — a six-check JSON result.
Die Walküre / Act 1: Orchestervorspiel - Live In Bayreuth / 1967
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e62e7139a97869004a04440130120604c6e04082388def389ccf5495cb9a45. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506700064 — a six-check JSON result.
Die Walküre / Act 2: "Nun zäume dein Roß" - Live In Bayreuth / 1967
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf113342a588bee5dbe2fcba67cbd273c079e7eac45fc8165be069f1518fe6c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLA506700075 — a six-check JSON result.
Die Walküre / Act 3: "Hojotoho! Heiaha!" - Live In Bayreuth / 1967
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c658796b70c3435715cedf0bc11343671e59fbe60432c941bcb26b5ebc3627c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506700093 — a six-check JSON result.
Die Walküre / Act 3: "Leb wohl, du kühnes, herrliches Kind" - Live In Bayreuth / 1967
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e5270ecbb574e47b3c885ae4cf1fa522ad489ca54dcbeec0bb60297689ded1. 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/NLA506700088 — a six-check JSON result.
Die Walküre / Act 1: "Der Männer Sippe saß hier im Saal" - Live In Bayreuth / 1967
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e0b2ef7cbfdf8b6bc2ab81e34a99bfc7b901c764d486e7bbc6d7ac9e06d262. 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/NLA506700072 — a six-check JSON result.
Die Walküre / Act 1: "Winterstürme wichen dem Wonnemond" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a2da143dd424f462e21be012fb7fa17ffc76e33fb8777ccec6ee1df16c291f. 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/NLA506700073 — a six-check JSON result.
Die Walküre / Act 1: "Wehwalt heißt du fürwahr?" - Live In Bayreuth / 1967
Wagner: Der Ring des Nibelungen, WWV 86 (Live)
Richard Wagner: Das Rheingold (Köln, 22.05.1962)
Wagner: Die Meistersinger von Nürnberg, WWV 96
Die Meistersinger von Nürnberg (The Mastersingers of Nuremberg), WWV 96, Act I: Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86d1fe574ee1f86c57ffe13ec5e7519bd929d86ad1208b765ffa532d67413bd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB951591701 — a six-check JSON result.
Richard Wagner: Parsifal (Bayreuth 1956)
Der fliegende Holländer / Act 1: "Mit Gewitter und Sturm aus fernem Meer"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0373670bf99ac543b99e1cafe29109acb25980a7d67caee365c65c3cf83acd. 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/DEF055801270 — a six-check JSON result.
Der fliegende Holländer / Act 2: "Summ und Brumm, du gutes Rädchen" - "Dann hält uns länger keine Pflicht" (Chor der Mädchen, Mary, Senta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01d04052bf6236f0a07c0dcd722f5721d0de1f85f4ad990e8704221948d45d5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEF055801271 — a six-check JSON result.
Der fliegende Holländer / Act 3: "Steuermann, lass die Wacht!" (nur Chor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c5de56cd353bd63b3e18d5595c9e2991a990a02a27e68ab1c1e6c78be31754. 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/DEF055801272 — a six-check JSON result.
Tannhäuser / Act 2: "Freudig begrüßen wir die edle Halle"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2771de7a2951b47c442ebe98a67aca724d14145735907c5ad91aeceab065e165. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055801280 — a six-check JSON result.
Tannhäuser / Act 3: "Beglückt darf nun dich, o Heimat, ich schauen" - "Dies ist ihr Sang"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d1c0479ebc541a0694250a68c4501e062b3d3bff3225ee92f2078095a483cf. 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/DEF055801282 — a six-check JSON result.
Tannhäuser / Act 3: "Heil ! Heil! Der Gnade Wunder Heil!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e4435dd4f5f16eeb9063f88dd44afbd83251d94792ce0e766c258599e8af41. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055801283 — a six-check JSON result.
Lohengrin / Act 1: Seht, seht! Welch ein seltsam Wunder!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17584498ac5e6c7eb39cab55412ca29f8f12d74785dd4a15cf615ae68ce9c6d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055801290 — a six-check JSON result.
Lohengrin / Act 2: "Gesegnet soll sie schreiten"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd18c0757510111c957e739de42ebfcba9139cfc27df5022cc69b76b6c3d3d80. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEF055801291 — a six-check JSON result.
Lohengrin / Act 3: "Treulich geführt ziehet dahin"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e57fd37019ad44a301fcb2d67a8c60e6c61ac554d4a352d5640e86af1e3531. 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/DEF055801292 — a six-check JSON result.
Die Meistersinger von Nürnberg / Act 3: "Wacht auf! Es nahet gen den Tag"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e948ff0bf44bc2e635c485c3a1a157ab25acdd0f17ce93f1f64db21c8752720. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEF055801301 — a six-check JSON result.
Die Meistersinger von Nürnberg / Act 3: "Ehrt eure deutschen Meister"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70685822c7c587d4054513aa89ffe7f46573410bedd87e484a2bcc3d4fb212b8. 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/DEF055801302 — a six-check JSON result.
Götterdämmerung / Zweiter Aufzug: Szene 3: "Hoiho! Ihr Gibichsmannen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f302d6733ab869087143c4c1f1159fc05570d5d716a8f51a759666d209e17c. 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/DEF055801310 — a six-check JSON result.
Parsifal / Act 1: Zum letzten Liebesmahle gerüstet Tag für Tag
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659746a42394b9d2aa4b5d7e18968de8e669260d281cad7406a84301f36a500a. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEF055801320 — a six-check JSON result.
Wagner: Choruses (Remastered, Mono Version)
Richard Wagner: Der Fliegende Holländer (Bayreuth 1956)
Wagner: Die Walküre, WWV 86b [Recorded 1960]
Wagner: Der fliegende Hollander (The Flying Dutchman) (1955)
Wagner: Gotterdammerung (Twilight of the Gods)