Johannes Schüler (21 June 18943 October 1966) was a German conductor. He held leading positions at opera houses such as the Berlin State Opera and the Staatsoper Hannover. He promoted contemporary mus
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 0x202a3eb82db018b8a611f38ceec12152041c76f2db67faab13d9854366acd464. Chain 2 (Bitcoin): anchored in block 954013 (2026-06-16T22:27:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34a49765-fef7-4fd8-aef1-b55676daf36e.json and https://artists.proofprofile.net/proofs/artist/34a49765-fef7-4fd8-aef1-b55676daf36e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Julius Patzak - The Early Operatic Recordings
Legenden Des Gesanges, Vol. 5: Peter Anders (1933-1953)
Josef Metternich: Rare & Unreleased Recordings
Heroes and Heroines of Bayreuth: Franz Volker (Historical Recordings 1928-1941)
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF050702020 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF050702030 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF050400003 — a six-check JSON result.
Die besten Hits von Fred Raymond im Originalsound, Vol. 2 (1934-1943)
Lauf ins Gluck (Run into Happiness): Baden-Baden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec6f4dae3b3864f84e37ff0d5b8612876be04fae3983490e0c1023c148e1c41. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL111200819 — a six-check JSON result.
Die 50 ergreifensten Arien - La Boheme - Don Giovanni- Carmen - Rigoletto - Fidelio
Tschaikowsky: Violinkonzert, Op. 35 - Serenade Melancolique, Op. 26
Los Grandes de la Musica Clasica - Hector Berlioz Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae4cba86af6498e620744e67ef24ec2ddd7395162ee1351b8dd3edb43cdc75f. 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/DES380006448 — a six-check JSON result.
Martha: Act I: "Gnaden Tristan Mickleford!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc8eefd9c33cfa9325c1d5a28b236fcc356b07bc84c67737d7cdb4b859b375a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380006451 — a six-check JSON result.
Martha: Act III: "Darum pflück icho Rose - Wo war ich?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894e6c28cc87dfdbcbf712e1827c6eec0700aa7ff507388325c582794538bdbc. 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/DES380006466 — a six-check JSON result.
Martha: Act I: "Wie das schnattert - Ja, seit früher Kindheit Tagen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268ad2a1390109a8bdc0976c3278dd9bcdf8b8a3fb1574241339b094e25c88da. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DES380006453 — a six-check JSON result.
Martha: Act III: "Mag der Himmel euch vergeben"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf54ec12defc1544d7f344ff33ff5130d6b541f991ad020130f3a88a1db561dd. 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/DES380006469 — a six-check JSON result.
Martha: Act IV: "Lady! My Lady! Trauter Freund - Der Lenz ist gekommen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc158761d5daf5ccf1857378d158b597b7db34a5ef7b0a74129a6d0fa3f2fcb4e. 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/DES380006470 — a six-check JSON result.
Martha: Act II: "Letzte Rose, wie magst du so einsam hier blühn - Martha! Herr!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba14c5e12263d5d9b507b71bf4cd9a2cefa56b370db738f9c1ceb34af5af737. 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/DES380006460 — a six-check JSON result.
Tchaikovsky & Mendelssohn: Concertos pour violon (Mono Version)
Weber: Ines de Castro: Scene And Aria Of Ines
Jocelyn, Op. 100: Berceuse. "Oh! ne t'éveille pas encore" - Arr. For Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08497216414755bb1822c874df574f3a6a5b4327f0b946d0bdde02e052902a3. 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/DELV41700472 — a six-check JSON result.
Sonata in E-Flat Major for Clarinet and Piano, Op. 167: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1b41c2fdac9e721b85aaf2d107632a76f33ae7fd1958e56ef1fa769266dcd7. 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/DEA580900519 — a six-check JSON result.
Große Sänger der Vergangenheit - Heinrich Schlusnus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6bb3638f1e16bed7b5b9c73572f5aa53a7bf70d87787986ac709a010616489. 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/DES380612001 — a six-check JSON result.
Große Sänger der Vergangenheit - Erna Berger
Schock, Rudolf: Die Schonsten Opernarien (1947-1953)
Das Schönste Aus Der Welt Der Oper (Folge 7)
Berger, Erna: A Vocal Portrait (1934-1949)
Legenden Des Gesänges, Vol. 5: Peter Anders (1933-1953)
Flotow & Lortzing & Mozart & Weber: Va, Pensiero, Sull' Ali Dorate - Famous Opera Choirs Vol. 4