Maria Cebotari (original name: Ciubotaru,Iosif Constantin Drăgan, Prin Europa, Vol. 3 Editura Eminescu, 1980, p.89 10 February 1910 – 9 June 1949) was a Bessarabian-born Romanian lyric coloratura sopr
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 0xf7a52f4ad5114e0687b6765ead72f033e0ccc25f243578503592509325dcaaad. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab0e98e4-3012-403c-8fa9-e882d199291f.json and https://artists.proofprofile.net/proofs/artist/ab0e98e4-3012-403c-8fa9-e882d199291f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bizet: Carmen, WD 31 (Sung in German) [Live]
Strauss: Der Rosenkavalier Op. 59, TrV 227
Salome op. 52 starring Maria Cebotari live her only complete Recording
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 0x49754b202b7aa61de379353fa68b3476d4fd7d1a392eaffc88f167d782cd4b80. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEF050702020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44a7d34fc3a17fd5306fd2177acd7dde128377d70557797014b7b71ff4a5111. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEF050702030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fef8d3d52a17e34a182f00e963b0f037a003d3cc6a31ca6ecccb7afd25899f. 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/DEF050400003.
Voi lo sapete, o mamma (Cavalleria rusticana)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97d29c207e6a2967912d0e5dbc0168d6223c5a39673562c7dabf7925a1c2a0b. 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/GBAYC0802087.
Mozart: Don Giovanni, K. 527: Ich weiß ein Mittel (Sung in German)
Bizet: Carmen, WD 31: Ich sprach, dass ich furchtlos mich fühle (Sung in German)
Richard Strauss: Les grands opéras - La discothèque idéale de Diapason, Vol. 7
Die Entführung aus dem Serail, K. 384: Welcher Kummer - Ach ich liebte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3322ef5e79711c6f4a033ed47544f5fe1771ee2f583cedda36dc73fb133e60. 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/DEB959539408.
Puccini: Les opéras - La discothèque idéale de Diapason, Vol. 10
Masters of Music: Tonfilm Schlager, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe581bbf50ac76c8aaad8b8e1d157aafd7aa1a445825a62ae773133e962396a86. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLHR51262920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5785c101967267ad956002a095d021254a3366f68930eaada159e735357d13fe. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLHR51262939.
Die schönsten deutschen Tonfilmschlager von 1929 bis 1950, Vol. 11
Heut ist der schönste Tag in meinem Leben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b150bd77dd3c8fbdd7a571f18afea400469ee8c3986d22fb4a7b3435f506110. 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/DEU240303295.
Schlagerperlen, Vol. 9 (Die schönsten deutschen Schlager)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27ffc34441fcb7b896f2dbe960b3ac8cf6bf42e35f9f0eea7de9af1d6b15ead. 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/DEHB51206708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed4af52ff0d728ec6a3c86f73d8b31ea56034433150d5cce9962fb46a1067d6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEHB51207194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67c8f907abf08ae22d757fe484a247120756fe401a4d244531a1339d2ac8283. 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/DEHB51207164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93085c77ca45bb530e34010df7dc4419bebc885cba39b2295c78524ac23b585. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEHB51206587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e37076e1267144c7405f8b8e8ff1a80c1657cb2c366f2caa9a605ddf50a366. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEHB51206539.
Schlager Music from the German Cinema, Vol. 5
Ich Bob 'Ne Altetante - From The Film Die Privatsekretärin - 1931
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92adf117dbd096aedb2f06a7ebda133752c7ae88c355fd3af4d2c5e8da509e22. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GRHR11139105.
Warum - From The Film Der Studentvon Prag - 1935
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543bb1e7e8a306d69aafdf8bf6a83cc752f621de69489b5ad3578e034c8f5d0a. 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/GRHR11139119.
Maria Cebotari sings Richard Strauss (Recordings of 1943)
Lebendige Vergangenheit - Maria Cebotari
Chorszenen und Konzertchöre in Rundfunkaufnahmen ab 1938
Die Meistersinger von Nürnberg, WWV 96: Silentium! Silentium!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925beb334e4510324cb2cbbc05be3a76e9342f2860b61c9f887212bfc3032cbd. 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/DEAD61703101.
Lohengrin, WWV 75 (Highlights): Gesegnet soll sie schreiten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e7f7a947768f8ce3d4fb1abb602183bbe7ed51d6a799af45f385a2961c7276. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD61703104.
Carmen, WD 31 (Highlights Sung in German): Diese Menge, im Gedrange!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004b915f359d5c4d95541434d2757870f19388669f5d230206090085b9b911cd. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEAD61703111.
Carmen, WD 31 (Highlights Sung in German): Habanera. Ja, die Liebe hat bunte Flügel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d756f56b604565583ad0754228a90a7a0e4f49e53cd1b027e8dab368545ee4. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD61703114.
Die 50 ergreifensten Arien - La Boheme - Don Giovanni- Carmen - Rigoletto - Fidelio
Operas and Operettas - Donizetti, G. / Lehar, F. / Kalman, E. / Boito, A. / Puccini, G. / Bellini, V. / Mozart, W.A. (Festival of the Primadonnas)