Klaus Hermann Wilhelm Tennstedt[https://www.deutsche-biographie.de/gnd124624030.html#ndbcontent Deutsche Biography (; June 6, 1926 – January 11, 1998) was a German conductor from Merseburg. Known for
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 0xc95c59e99f9138475195a2005e5406612cf1bd5ed79d41f1e6266e31e699c61e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27997628-8cb9-4176-969d-a139ee027e95.json and https://artists.proofprofile.net/proofs/artist/27997628-8cb9-4176-969d-a139ee027e95.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Mahler: Symphonies Nos. 4 & 8 "Symphony of a Thousand"
Mahler: Symphony No. 4 in G Major: I. Bedächtig, nicht eilen
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 0xc8d11893853c1b757cb18eb462560c498e6edb70b5d1c93f5fd6c8769f06eb4e. 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/GBAYC8200032 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": II. Final Scene from Goethe's Faust. Poco adagio - Wieder langsam - "Waldung, sie schwankt heran"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f03336b7aa9b8addf7606c24c7cdb7dec38ac8a0811ec0c62800fcd1d835096. 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/GBAYC8600526 — a six-check JSON result.
Mahler: Symphony No. 4 in G Major: II. In gemächlicher Bewegung, ohne Hast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e447e67a22a6892601bd378a1e7017aba2bca76e9fbd663418469b8859fe339. 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/GBAYC8200033 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": II. Final Scene from Goethe's Faust. "Ewiger Wonnebrand"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd281fab4d4462b3fe129650c000cf5612eaf09c8267af70f0c119ab163521c60. 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/GBAYC8600527 — a six-check JSON result.
Mahler: Symphony No. 4 in G Major: III. Ruhevoll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052f8d77871eda29cd83c1a31adb120e697f3736ef77e6ee03d85c05c2e0860b. 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/GBAYC8200034 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": II. Final Scene from Goethe's Faust. "Wie Felsenabgrund mir zu Füssen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09989b2e201974d148c72ad57671e197d417f0e4d8e3f99c94c99a073c1467f0. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/GBAYC8600528 — a six-check JSON result.
Mahler: Symphony No. 4 in G Major: IV. Sehr behaglich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323eef304a0618422165dc070c8ccd2273c3e424a7fd53195d2038fbc315ce95. 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/GBAYC8200035 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": I. Hymnus, Veni Creator spiritus. "Veni, Creator Spiritus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe259884651887794b74d905c2446d073ee51d63b36170638ff3e6d4deff8db4f. 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/GBAYC8600519 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": I. Hymnus, Veni Creator spiritus. "Imple superna gratia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063b4ccf915304966e89ad1e84553d63ac1683949421fa23a4724e3ce4eee443. 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/GBAYC8600520 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": II. Final Scene from Goethe's Faust. "Hier ist die Aussicht frei"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca33976a90ae9f8d602e7f80a3cfa490d44264a4de81c8600a3efed8e7ac4d6. 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/GBAYC8600531 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": I. Hymnus, Veni Creator spiritus. "Infirma nostri corporis"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7597f885be78bc1131813bdbd81b2ae7ee3506e8471483a01f687ad649c3cf9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBAYC8600521 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": II. Final Scene from Goethe's Faust. "Höchste Herrscherin der Welt!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c7f57899a7a22a35a0c2960fefe9419cd8d046232531568d5d46a6984ddc1a. 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/GBAYC8600532 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": I. Hymnus, Veni Creator spiritus. "Accende lumen sensibus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75efd02267b582cbe8db9f8f8815c92b3a81d2ab24e12c50505b6786029ee963. 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/GBAYC8600522 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": II. Final Scene from Goethe's Faust. "Dir, der Unberührbaren"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e9fc11d8957b72e3257c12ab5b6afe0cb94d548e62302eee5e27f03177a0b7. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBAYC8600533 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": I. Hymnus, Veni Creator spiritus. "Veni, Creator Spiritus" (Repeat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b704421d4ee61d2e5676d95efa375c030c5251449ec9131d3ccdd313109b614. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBAYC8600523 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": II. Final Scene from Goethe's Faust. "Bei der Liebe, die den Füssen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe289302c94767cbe813ddea5ae7138db44a5b00933ac97a32c498f829df699. 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/GBAYC8600534 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": I. Hymnus, Veni Creator spiritus. "Gloria sit Patri Domino"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4568667cae77693858d0804b680eb1481ffc6205a9bd03ec6db4783057a822f. 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/GBAYC8600524 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": II. Final Scene from Goethe's Faust. "Neige, neige, du Ohnegleiche"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee516ef07387cb3c24e9397455839400729015349f4d3dce636e0aa26834655. 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/GBAYC8600535 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": II. Final Scene from Goethe's Faust. "Blicket auf zum Retterblick"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ae6748dcb7a8186b40a334aaf35641aa86cc4ff11092dbf7c72ce5f2197a59. 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/GBAYC8600536 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": II. Final Scene from Goethe's Faust. "Alles Vergängliche"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf85f55583882094bec409bc9455553f3ab9176eced10510f6b7a6903d5ecf33. 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/GBAYC8600537 — a six-check JSON result.
Mahler: Symphony No. 5 in C-Sharp Minor & Kindertotenlieder