The Kremerata Baltica is a chamber orchestra consisting of musicians from Baltic countries (Estonia, Latvia, Lithuania). It was founded by Latvian violinist Gidon Kremer in 1997. Gidon Kremer is an ar
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99fa13865b1f4bb66678e98751daec72aa1a5e9df0cf233cb2e24501d01d9ce. 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/3879451e-d2b8-4f85-957f-a54a32f91af9.json and https://artists.proofprofile.net/proofs/artist/3879451e-d2b8-4f85-957f-a54a32f91af9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Concerto No. 1 in C Minor, Op. 35: IV. Allegro con brio
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbda52f4b0d3611aad14c356ab63e1318633dc6126ac3984667a830e29f6ae0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1420304.
Piano Concerto No. 2 in F Major, Op. 102: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4fcfe6decbcdc8a205335ff07dcbfc13d86fefd1fe4463547dc2d4119fd475. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1420305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1836a348057003f88a4fe23dba82746ef34803a115f9589943c56ec9afc17c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1420309.
Piano Concerto No. 1 in C Minor, Op. 35: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6548f77beeea78948beda1cdc944d4f015997c1ac89d83ddade0dc12d9ba5c93. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1420301.
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
Piano Concerto No. 1 in C Minor, Op. 35: II. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492528927344439d124c662d56b23f07b94596231d215a0505ebdd52152f1d85. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1420302.
Piano Concerto No. 2 in F Major, Op. 102: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560831375d3b163a1e681716ff9b458af553fdc1e1de0d992decb4239073abf2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1420306.
Piano Concerto No. 2 in F Major, Op. 102: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad6477db669459fd3320d6ac6ef184ee42c645c56de7822256b6f4d26ceac2e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1420307.
Songs of Fate: Weinberg, Kuprevičius, Šerkšnytė, Jančevskis
Chamber Symphony "The Star of David": David's Lamentation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6840624d34eb1b77fb205e43b41399db56454b66444c4a11dc3d5b045163eb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3b24492716c0a594aa67b449bc7a6dd73391490a490cf27de82cae3e73e191. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d72ac9f3c5f89af8bf877bc482266bcd4a8daea07095835f6f6cae8e4eca534. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274504.
Chamber Symphony "The Star of David": Postlude. The Luminous Lament
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf418b765a976091fc704d387ba8c5e98b09d0fb194d53560505cef6136196ab. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaafdabd45fb57c4721633c5d366f33e2b8b3709ddd2315860d49607e8578a3f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9972a777dc616820cabcfc5165c1fd10800bcd976a12f8a0efe27a7f5c405def. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd614316b9299fa7b5f2356ea91911f18490a6cecb42facec2837834673a1498f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72701c10cacc70a7974bbfb0129fae4262a6397a4e9e764d44c46faf0a5c306f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9895dfeba166a315fecc91fdebe4fbc971e2ab43e84b8e5d054815dd7c5341. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc287e5621bf607f0482f192233ad167cc7c6767299c0709190e3e65f5d8dd7df. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274508.
Jewish Songs, Op. 13: No. 5, Oyfn grinem bergele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa45b04e92ac553d85a12ac6aedb5fc3d09f135451c9ba7c8322de06e1f26b9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274509.
Jewish Songs, Op. 13: No. 6, Der yesoymes brivele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad12c3100c87725793f04c68bbb626e6501352b280f8c39d6f8ebe26294b177. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB332274510.
Little Concerto for Two Violins: III. Ceļš
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e36910b791c1f9dadbbe6438e79b58228ce37377220ae545ae4ed53623f060. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LVL152200826.
π = 3,14 for Two Double Basses, Percussion, and Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33846c05a629f9adc25ac173bb667d51245270330a5d35c8743881e623b33538. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LVL152200823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111b8da4ed9fe560bef97a94b869708bbf0fa21a11ce152ea4433531b8b44156. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LVL152200825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438ceb3e3baa26393fbeda591644a9614f034b50fc50c3c2eceb1af85d396121. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LVL152200824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9993bdc29f83f161acb33bb0963c35661d56487e81d0c649d5ab522085ff2b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LVL152200819.
Searching for Ludwig: Beethoven, Sollima & Ferré
Symphony No. 21, Op. 152 „Kaddish“: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87b314fa83b00dc497a8c4f9aff6d01399add425704cfa6a35e78c2ac8d818e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900641.
Symphony No. 21, Op. 152 „Kaddish“: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa866f9d61c0b13cf96b25b90c4688ca01eeb23bd89702239865a6267f5e58ead. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900643.
Symphony No. 21, Op. 152 „Kaddish“: IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d218193f11b95fb23a4b20dcc0b1ea092c2f82ce257e38f591f12ccb22cb9b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900644.
Symphony No. 2 for String Orchestra, Op. 30: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0dbffe2057f7b2b04975b764a90b51cfc8d8b4db6c6bb66933a8266e180a81. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900631.
Symphony No. 2 for String Orchestra, Op. 30: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fac24a91e80ddce1235368adc19d1a343dc1e86aabde738b7784972594da59. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900632.
Symphony No. 2 for String Orchestra, Op. 30: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011e313bc2d1cd98753c10cc0782abcc065f4a4a44d8ba127312913e8e8651ee. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900633.
Symphony No. 21, Op. 152 „Kaddish“: II. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43bfa9a5aded92a6c7babb33f77dafaf658776d6351bb7cdb01337b02796aae. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900642.
Symphony No. 21, Op. 152 „Kaddish“: V. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dd854b14349648dfbf0eb2171e2406bf90b4065d4566c9e55050b794f0bc8b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900645.
Symphony No. 21, Op. 152 „Kaddish“: VI. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da03a69334e81f4c924cea07c8322e79e908e08e96baaeac8044dae5b025f40. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900646.
Yumeji's Theme - From "In The Mood For Love"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8198b6fa2e81969293b305bd938ce34604201f5890338b3abe211be4e2f09f44. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961305000.
Piazzolla / Orch. Gupta: Concierto del Ángel: III. La muerte del Ángel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb325b494575447ac6b1321a971a6f085693a9521fb11f381cf21a1f75f72b08e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA809813603.