thumb|Sena Jurinac - Masterclasses Paris - Salle Gaveau May 1989 Srebrenka "Sena" Jurinac () (24 October 1921 – 22 November 2011) was a Bosnian-born Austrian operatic soprano. Biography Sena Jurina
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 0x7348a3f4f4b5c1d2f3eabb8bc35d0e89fa47dd8a040c8be66dcda6a08710ddb5. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/015e73ff-5f9d-418c-8631-6f7b50900318.json and https://artists.proofprofile.net/proofs/artist/015e73ff-5f9d-418c-8631-6f7b50900318.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Don Giovanni, K. 527 (Sung in German) [Recorded 1955] [Live]
Eugen Onegin staring Dietrich Fischer-Dieskau
Gluck: Orfeo ed Euridice (Sung in German)
Verdi: Don Carlo (Live at Felsenreitschule, Salzburg Festival, 1958)
Wagner: Götterdämmerung, WWV 86D (Remastered 2021) [Live at Auditorio del Foro Italico, Rome, 1953]
Puccini: Madama Butterfly (Wiener Staatsoper Live)
Dvorak: Stabat Mater conducted by Rafael Kubelik live (Live)
Stabat Mater, Op. 58: I. Stabat Mater (Andante con moto) - Live
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 0xcbc9def44e3be66b1ce0d6f4b172326c30f3f12f439cb6ecdc54ed7ec390f4b5. 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/USB8U2401665.
Stabat Mater, Op. 58: III. Eja, Mater (Andante con moto) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb06ab203e87f79e5906c4fbee7a39adb5d8fa688e1ea8756390e9307c34276. 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/USB8U2401667.
Stabat Mater, Op. 58: II. Quis est homo (Andante sostenuto) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3f62c2ad838d8bd4ed135097b89bedf4996915cec269d34ac4a024430f1783. 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/USB8U2401666.
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
Stabat Mater, Op. 58: X. Quando corpus morietur (Andante con moto) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2466fb9caad3a139b0f0d95a7c5a13b6c6f5b5b89f09ed9292f23a5609b48562. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USB8U2401674.
Mozart: Le nozze di Figaro (Sung in German), K. 492 [Recorded 1950]
Engelbert Humperdinck: Hänsel e Gretel (Complete recording sung in Italian), Herbert von Karajan
Weber: Der Freischütz, Op. 77, J. 277 (Sung in Italian) [Live]
Schumann: Liederkreis, Op. 39 & Frauenliebe und -Leben, Op. 42
Puccini, Madama Butterfly, Sena Jurinac (Live)
Richard Strauss: Der Rosenkavalier (Wien 1955)
Schumann: Frauenliebe; Liederkreis / Respighi: Il tramonto
Mozart: Idomeneo, re di Creta, Extracts (Mono Version)
Beethoven: Fidelio Op. 72 (Hans Knappertsbusch - The Opera Edition: Volume 1)
Wagner: Das Rheingold, Scene 1: "Der Welt Erbe" (Alberich, Woglinde, Wellgunde, Floßhilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ffff0e1a4d4101810f66e0971e01e1b6cd97192b2802e021bdbe4093f0179a. 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/GBAYC9004664.
Wagner: Das Rheingold, Scene 1: "Weia! Waga! Woge, du Welle" (Woglinde, Wellgunde, Floßhilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9782b9e740248ed57cb9240e81d234eba70fe7cf350b2a6d1ab4eba9ff040b3. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAYC9004659.
Wagner: Das Rheingold, Scene 1: "Hehe! Ihr Nicker!" (Alberich, Woglinde, Wellgunde, Floßhilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07726c3ad8d65240c9ffd0719237c47004c578e4cb8adcffb29a51767e1a272. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAYC9004660.
Wagner: Das Rheingold, Scene 1: "Garstig glatter glitschiger Glimmer!" (Alberich, Woglinde, Wellgunde, Floßhilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405f375743e9edd027f2a138dae8f2252079cecdc09f47cd83c8dd31ec877c1b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004661.
Wagner: Das Rheingold, Scene 1: "Lugt, Schwestern!" (Woglinde, Wellgunde, Floßhilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bf423af313fa533356bb386605ad99f8b2e023a6d05687ea3adc58b1ff56ae. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004662.
Wagner: Das Rheingold, Scene 1: "Was ist's, ihr Glatten" (Alberich, Woglinde, Wellgunde, Floßhilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70930b8439e12ef0a15cb911f401090472799616e114f4029527bbde567ac3cc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004663.
Wagner: Das Rheingold, Scene 1: "Bangt euch noch nicht?" (Alberich, Woglinde, Floßhilde, Wellgunde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f32f1854519caa8e7782f36c46f59ee7c744cb642074718d7bc28de8325ec9. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBAYC9004665.