Isolde Ahlgrimm (31 July 1914 in Vienna – 11 October 1995 in Vienna) was an Austrian harpsichordist and fortepianist. In 1975 she was awarded the Austrian Gold Medal. Musical education Ahlgrimm pursu
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 0x6242a18a2dde6184472241c73875a953f314230368cd2b26fb98e7c8909fcacf. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47733d24-4d33-49fa-b28d-00c0d6ef9cc7.json and https://artists.proofprofile.net/proofs/artist/47733d24-4d33-49fa-b28d-00c0d6ef9cc7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Georg Friedrich Händel: Keyboard Suites Nos. 1-4 / Prelude and Chaconne, HWV 435 (Ahlgrimm)
Toccatina sopra la ribellione di Ungheria: I. Toccatina: Galop
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 0xa32c169b63c3b1747d553dbf7893df0dd0d6e54d54121e6280cd9d4a5b5c7872. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DES380014804 — a six-check JSON result.
Toccatina sopra la ribellione di Ungheria: II. Allemande: La prisonnie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8eeead9553d72b186276cb459a7d7a62cdbc5ab8154c6ecef09fd7e71b4d04. 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/DES380014805 — a six-check JSON result.
Toccatina sopra la ribellione di Ungheria: III. Courente: Le process
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9e43386b2a4b2dfabb81d7adb136af788d9e15f02c8175930a0dcc17bc7967. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DES380014806 — a six-check JSON result.
Toccatina sopra la ribellione di Ungheria: IV. Sarabande: La sentence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee5eec64c24a5452c184727df6aeb6b0970e68fa462c198045aaa97b78399d9. 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/DES380014807 — a six-check JSON result.
Toccatina sopra la ribellione di Ungheria: V. Gigue: La lige
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3039084757d1aaf02ad76f07053eef4aab71eaf9750ac6abf0c181b6f7e379ad. 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/DES380014808 — a six-check JSON result.
Toccatina sopra la ribellione di Ungheria: VI. La decapitation, avec discretion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05a7e4f769e059c0538800b23ceb66f9c01eae4a12260422a1c751e20f0cba8. 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/DES380014809 — a six-check JSON result.
Toccatina sopra la ribellione di Ungheria: VII. Passacaglia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa95c3afbc92a989ca95b6d77e8ef68378158b41db96a787af8424a5ab459e3c. 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/DES380014810 — a six-check JSON result.
Toccatina sopra la ribellione di Ungheria: VIII. Les Kloches: Requiem eternam dona eis Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602f683386c3289a7821ab85660e04205f9f2f77a73a945af1e0c8d9f3cb3986. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380014811 — a six-check JSON result.
Suite No. 3 in D Major: I. Fantasie: Grave - Vivace, R. 101
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce63c3cc5fcfb38275253f182a1557045a40e5903610cd035d7ddfb4122143d9. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/DES380014812 — a six-check JSON result.
Suite No. 3 in D Major: II. Allemande: Affettuoso, R. 102
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e535c1892ac43a6f801e46ff4c5b8039a6e07bff34f5688c546ff7361039bd. 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/DES380014813 — a six-check JSON result.
Suite No. 3 in D Major: III. Courante, R. 103
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8bb0a02735a72e1badf8dcc3d8dc93b88ea63e0dc3569acf837aab5ea0114d. 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/DES380014814 — a six-check JSON result.
Suite No. 3 in D Major: IV. Sarabande: Adagio assai, R. 104
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6988515226fa65abbea9616488dd8b9efbdb868630e1eb15212e49886e964a78. 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/DES380014815 — a six-check JSON result.
Suite No. 3 in D Major: V. Menuet, R. 105
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c76de5e7f368cdfcd6cd889c2d703685a2e13c80aa338229483b99b8df2ee9. 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/DES380014816 — a six-check JSON result.
Suite No. 3 in D Major: VI. Rigaudon bizarre: Spirituoso, R. 106
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686623a7765f300afa2f36b7d90653372e1a54577c0f8eb32440e61ee9a5e836. 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/DES380014817 — a six-check JSON result.
Suite No. 3 in D Major: VII. Air: Affettuoso, R. 107
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6a581cc3bc0a991d6f06e372aef775de4790aba2393e21cc6f3d782cd59f32. 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/DES380014818 — a six-check JSON result.
Suite No. 3 in D Major: VIII. Finale: Spirituoso, R. 108
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef751fce1518422186dbe6bba229eb20d7a173f31d3ed119027f36309841c1e4. 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/DES380014819 — a six-check JSON result.