thumbnail|upright=1.2|Stölzel composed Die Freuden-Ernde for the 48th birthday of Magdalena Augusta, the wife of his employer Duke (Gotha, ) Gottfried Heinrich Stölzel (13 January 1690 – 27 November
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 0x8dd36722ff0b0e15919c9ab43cb7bf20a70f639a13ea2843247d1fec8243a080. 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/d96ffbb8-d955-43ca-b319-850028746159.json and https://artists.proofprofile.net/proofs/artist/d96ffbb8-d955-43ca-b319-850028746159.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Stölzel: Christmas Oratorio & Cantatas Nos. 1-5
Stölzel: Der für die Sünde der Welt gemarterte und sterbende Christus
Der für die Sünde der Welt gemarterte und sterbende Christus, Pt. 1: Mich vom stricken meiner Sünden
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 0x62d66e7f4eb972cd869d0a2743203a6a7501ace2265bbbe1c46d081520bb1ccd. 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/DEB209756001 — a six-check JSON result.
Der für die Sünde der Welt gemarterte und sterbende Christus, Pt. 1: Der Gott, dem alle Himmelskreise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a3ea3867b98afc7a9ae6bf63abb83f1dfebeb2a341aaf7e9763b09bc04b0af. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEB209756003 — a six-check JSON result.
Der für die Sünde der Welt gemarterte und sterbende Christus, Pt. 1: Gott selbst, die Brunnquell alles guten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2de30d97d026fd26563468a2b98c6b963b82933e5fafb9e2682deeb98459d2d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEB209756005 — a six-check JSON result.
Der für die Sünde der Welt gemarterte und sterbende Christus, Pt. 1: Drauf sagten sie dem Höchsten Dank
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd0e532f9d57800ea69f4484ee47ecd726e129baacf6b6078090d8ace8cd5b5. 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/DEB209756007 — a six-check JSON result.
Der für die Sünde der Welt gemarterte und sterbende Christus, Pt. 2: Ach Gott und Herr
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd8a825132e7d0baab159641e46a6eeaee95f17551cc37287a4df1c59167ae0. 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/DEB209756023 — a six-check JSON result.
Präludium, BWV 934 from Johann Peter Kellner's Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2140f8be52d8482674ea7849f1c768858ce57d4764b12cd3c700cc99a3f6b0. 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/NLY332201996 — a six-check JSON result.
Präludium, BWV 937 from Johann Peter Kellner's Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250b60bc262dd7736422578b68149fb156789e49d041c5146f864868bd60d1c3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLY332201997 — a six-check JSON result.
French Suite No. 3, BWV 814: II. Präludium, BWV 939
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cfe7f4db749c60ac983a298c553c29c7ba8a5e6bf6cdb96db421d4e3a9f9da. 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/NLY332202000 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024684f8070a8a2053fc3777e9a6619d45082c88533e55666ed7843bbd855452. 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/NLY332202003 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a38e19dff37e490e207f2340bc9fc0916801ccf2bb05e3be7992cf2688f785a. 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/NLY332202004 — a six-check JSON result.
"'Great Relaxing Classics" - Smooth & Peaceful
Notenbüchlein für Anna Magdalena Bach: XXIV. Bist du bei mir, BWV 508 (Arr. J.S. Bach)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaea27ae697e1587fbac7cf3fab8c6d01d8933b8517b69c97b2b24a84e85b7e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLY331407120 — a six-check JSON result.
Concerto grosso a 4 chori in D Major: III. Vivace
Baroque Trumpet Gala - Biber, H.I.F. Von / Telemann, G.P. / Handel, G.F. / Vivaldi, A. / Endler, J.S. / Stolzel, G.H.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8646a9f6c47bf7be39edd2b49e318cace07bd6334891118d7f2a94d7810212. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US37B0601698 — a six-check JSON result.
"Bist du bei mir", BWV 508 Aria: Bist du bei mir, BWV 508
Only Bach - Cantatas For Soprano, Violin & Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec29a57197265a41e592bb418005211c0e87493ca7519fe4680e6f70569edad. 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/KRUM71400027 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387e2543c0f1bc19d6661a78ada1a9fe4407903ae3fe20685ea5f6ebca542f09. 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/NLA508325103 — a six-check JSON result.