{"copyright_id":"0xe65c172d50369d78a1675c838b813938ad13bfccba6b3e6e67eb3839750b992d","name":"Karl Ristenpart Chamber Orchestra","registered_at":"2026-06-17T14:07:31Z","symbol":"NIM1419137","token_address":"0x63baf4953fb7da18abba9bcdee09f45eef94a1d8","type":"artist","uuid":"8ad2172a-d123-43c8-8e65-fb1d5eb9cdca"}
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 0xe65c172d50369d78a1675c838b813938ad13bfccba6b3e6e67eb3839750b992d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ad2172a-d123-43c8-8e65-fb1d5eb9cdca.json and https://artists.proofprofile.net/proofs/artist/8ad2172a-d123-43c8-8e65-fb1d5eb9cdca.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Bach, J.S.: Cantatas "Ich will den Kreuzstab gerne tragen", BWV 56; "Ich habe genug", BWV 82
Bach, J.S.: Cantatas "Christ lag in Todesbanden", "Ich will den Kreuzstab gerne tragen" & "Ich habe genug"
Christ lag in Todesbanden, BWV 4: I. Sinfonia
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 0x554a9f6d532d827bfc939ec03b0f9949945d4329b775a69d889cae2eec90ee0c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055002581 — a six-check JSON result.
Christ lag in Todesbanden, BWV 4: II. Verse 1, Chorus. Christ lag in Todesbanden
Chor der Staatlichen Hochschule für Musik, Frankfurt am Main
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588abc80d25fb8de2651646ffa7f2c56994024dcbd4f7312a3f1d885fc522e10. 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/DEF055002582 — a six-check JSON result.
Christ lag in Todesbanden, BWV 4: III. Verse 2, Duet. Denn Tod niemand zwingen kunnt (Soprano, Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a914db95cb2e9e1a6829983829eb14a69efb62229a4f529ef126de778878288. 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/DEF055002583 — a six-check JSON result.
Bach: Cantatas Nos. 56 and 82 / Brahms: 4 Ernste Gesange, Op. 121
Best of Baroque - Die 50 größten Barock-Werke
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cfb7217ea7cb19b89b5a7411cb8201f640dc7256158db39ee14954841c0544. 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/DEF058300330 — a six-check JSON result.
Solomon, HWV 67: The Arrival of the Queen of Sheba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535fc18055d53930089aeb2dda83b08be87551ae11fa47e9bf33bea0494881c9. 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/DEF058401950 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33310576ef6c758000204f38b0f8b5d956f8b4dd893ef0abe0abb4171391756. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/DEF058032701 — a six-check JSON result.
The Four Seasons, Winter, Violin Concerto in F Minor, RV 297, Op. 8 No. 4: I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5d84ff906950c8cacbe263e814a44bc0170904f6bc7e6c27233a206ca76936. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058104821 — a six-check JSON result.
Ich habe genug, BWV 82: I. Aria. Ich habe genug, ich habe den Heiland (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c627fde7a792364228838c8345a9e5f5109a834f9f535ad75accdf97e33684. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEF055103251 — a six-check JSON result.
Brandenburg Concerto No. 3 in G Major, BWV 1048: I. [Allegro]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41ab779365468d7e276d2da876c5c0f56e1adacbebe3e63011de252d9d17b02. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058603581 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdd1e2b88d670d32d06c3c894f906e5730e216a6479c9e124f917e1c0c8128e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059630741 — a six-check JSON result.
Concerto in F Major, Op. 4, No. 12: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981a3a2b511bc221a41927fec1aa5585df0eea9cc4fad61665f0df10ca869f5a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEF059102652 — a six-check JSON result.
St. Matthew Passion, BWV 244 / Part Two: No. 39 Aria (Alto): "Erbarme dich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586dc6239aa6a0d872410286025e8d7a0425bf91f0be7b3f1dabe0117995faf9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEN960231139 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cfb7217ea7cb19b89b5a7411cb8201f640dc7256158db39ee14954841c0544. 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/DEF058300330 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe998fee20e124de2532ba994e4d48ffa883e7fd860231169f0a3253b2c484c27. 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/DEF056901820 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b279b7932f886c9e18efae246e243bae9221967a2ea13693bdc0bf77137149f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEF056902650 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ea4dd714714da04e225fb72e02c80350e02dbe44ecfc208c8106264c8ae3da. 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/DEF056902820 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7057ca24a4b72eb9cc6a5eeda7becbb225b4ad18135ad0f3799d1812f7c3295d. 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/DEF057230204 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c627fde7a792364228838c8345a9e5f5109a834f9f535ad75accdf97e33684. 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/DEF055103251 — a six-check JSON result.
Orfeo ed Euridice, Wq. 30 / Act 3: No. 43 Aria: "Ach, ich habe sie verloren" (Arr. Alfred Doerffel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5254abbb95b57f828990b8e4da7cfa14760ad8d097d85424d5fba9b1e0cab80c. 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/DEF055630141 — a six-check JSON result.
Die Zauberflöte, K. 620 / Act 1: "Der Vogelfänger bin ich ja"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56f7ff9ab4cc6a97750b4d70edb1bbc78dfe0c22744f0c5943b0990e7b16a1d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEF055530503 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74b33c4070bad5689913e6cfb04466047c67bcd63209147cb8c96b2368a96fb. 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/DEF055800830 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe389c52de0171a957a7f3dac79f9d4acb8e3dd9570a0824b8bbd53de727cc448. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEF057300530 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe998fee20e124de2532ba994e4d48ffa883e7fd860231169f0a3253b2c484c27. 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/DEF056901820 — a six-check JSON result.
Bach: Cantatas Nos. 56 and 82 / Brahms: 4 Ernste Gesänge, Op. 121