Jennifer Koh (born 1976) is an American violinist, born to Korean parents in Glen Ellyn, Illinois. Life and career Koh earned a B.A. in English Literature from Oberlin College, as well as a Performan
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 0x3a50ddf9177322b9b4f732442145fad640da3c0ed112f2eed68b5f3a1b65fe2b. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16e2ecdb-156f-4619-9f84-aa2107b6f4f7.json and https://artists.proofprofile.net/proofs/artist/16e2ecdb-156f-4619-9f84-aa2107b6f4f7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Violin Partita No. 3 in E Major, BWV 1006: I. Preludio
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 0x9fc00f908e3c211c4a606e5eace3978c197f791e5050071383b96e62f3176d5e. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USB8U1044513 — a six-check JSON result.
Violin Partita No. 3 in E Major, BWV 1006: VI. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2635a2379feaf2fa52395158bdfacaaf79ae9b7e095930422128b5772254830. 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/USB8U1044518 — a six-check JSON result.
Violin Partita No. 2 in D Minor, BWV 1004: I. Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505c61ab3de3d50027e7c5abef849fc05dab9daa73b738d1b5940ffe6467dba4. 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/USB8U1044525 — a six-check JSON result.
Violin Partita No. 2 in D Minor, BWV 1004: IV. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bac523979e13aaf97b68e24d8f40cb8a21864b87cf5955b86f6b1848e21187. 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/USB8U1044528 — a six-check JSON result.
Violin Partita No. 2 in D Minor, BWV 1004: V. Ciaccona
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83b23139ad1ea53a2313b2bc2335780caa3ace7fccf0f6c1953b983ec449568. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USB8U1044529 — a six-check JSON result.
Cantata, BWV 147: Herz und Mund und Tat und Leben, BWV 147: Chorale: Jesus bleibet meine Freude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5c3dc4d323ea15405e1ab47289864a52cf4a9809aa82b201a983b0c6bf7f36. 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/USB8U1601652 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fddc22b37737f0acbf81ae1f2c8573479a1b9295998210ec854e477203a645. 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/USB8U1601656 — a six-check JSON result.
Cello Suite No. 1 in G Major, BWV 1007: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc2c0271d9877bbf43474f7896ab3e70ef49f43f15c5910f07534f01f6540c9. 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/USB8U1601666 — a six-check JSON result.
Orchestral Suite No. 3 in D Major, BWV 1068: II. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea60007f74eee93ff9bce31429627bf42db15ff1889c00c26aab15f082c2047. 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/USB8U1601698 — a six-check JSON result.
Menotti: Violin Concerto, The Death of Orpheus, Muero porque no muero & O llama de amor viva
Concerto for Violin and Orchestra: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8925a9a5bf75e7807bd40ddd2aa0d3a9a89fc05b9c96f5e2918d7428095e32ba. 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/GBLWD0200802 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc2bfd64582ba1e759e3ed1702fe2476cda3035b6ec8915d073a887074a5ea1. 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/GBELX2007354 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d028bc7da543f88b88f92f03554133b2083dc5a46be6041e4840c296642ab3c. 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/GBELX2007355 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf369b16f90f6179ef586c6546b6072fa4d38bb3ac68b7a95b1529ab7dc841273. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBELX2007356 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28b7b4a4ed26fa9d27d2178a1de71b9c762db5b5bcf9aacaf302f191f2f7612. 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/GBELX2007357 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4036abee98eff2961a9979a74892e93aa8ce571c50c0dc4e64921ba6f83a4d. 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/GBELX2007358 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc9465fd48e7960468fd8a3f87f3be88602bb244c3a21d6656ef5dc2b7703b7. 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/USB801067418 — a six-check JSON result.
Tchaikovsky: Complete Works for Violin & Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdd616fb5e1d370eb1b866da625d8515340513bca6369c14d21a73b0fe836fb. 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/USB8U1075127 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfac61569ba6b9bc84625c783fab7be74bb44abc9cda67b901669f1e5e6f38b4. 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/USB8U1075128 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca68bc2adc200bcf0f6564cbf4ade2cda508b1fb3ea004e353644bc79ff997a8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USB8U1075129 — a six-check JSON result.
Zorn, J.: Goetia / Carter, E.: 4 Lauds / Salonen, E.-P.: Lachen Verlernt / Thomas, A.R.: Pulsar (Rhapsodic Musings)
Martinu / Szymanowski: Violin Concertos / Bartok: 2 Portraits
Violin Recital: Koh, Jennifer - Higdon, J. / Harrison, L. / Adams, J. / Ruggles, C. (String Poetic)
Schubert / Schumann / Schoenberg / Coleman: Violin Fantasies
Martinů: The Complete Music for Violin & Orchestra, Vol. 1
Concerto for Flute, Violin and Orchestra, H. 252: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85408dabf9933880245b5f80c2ddde72dda9cff7b51d482c3318d338e0722ec9. 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/GBAJY0767101 — a six-check JSON result.