Grażyna Bacewicz Biernacka (; 5 February 1909 – 17 January 1969) was a Polish composer and violinist of Lithuanian origin. She is the second Polish female composer to have achieved national and intern
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 0x841425699604766b16e19908439c8a177cfe804d1adc4edd42e7927fe9350314. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/749bb434-a92c-4b13-9424-d752d47a6a96.json and https://artists.proofprofile.net/proofs/artist/749bb434-a92c-4b13-9424-d752d47a6a96.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bacewicz: Complete Symphonic Works, Vol. 2
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 0x72ff5b17a6c8852e00cbc157ae54c48b21e95e970cc7aa0005fd8445acbaf054. 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/DEB202366001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee411622bb3972e4e17340de35c5b739c1537dbb4495748ba9b623b33e1d0924. 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/DEB202366002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ba0d9f9647757dcb3fe18133400e2fa1d3cbeb4733ab7e20e0d37fec0965a5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB202366004.
Symphony No. 2: IV. Finale. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa282af1aa6f3f2b93ee6fff06fc0b21b4b51e701d878f2f8d85cfb28d0a17e0a. 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/DEB202366005.
Bacewicz: Complete Symphonic Works, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcb8d21f5cdeb6d9ccc3ab2656f7bcf4e41755ddcf314c4ed4033697e7dffcf. 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/PLA390918916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e7917c6d3897d80aa3a9b174777c0ad096a6e224b98442192c8d210a086c8d. 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/USMH92303638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a2e872bd93a887cd7c956421f78eb8330c6a3a67aaf0e28cf3abad1d6ebe44. 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/USMH92303639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92adf2101ad9fb5491a3c3810dc4f38d1ff4ae60a475c9a4164285f63611025. 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/USMH92303646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9af13cd2ecb67a667e3d5448189d9bde25fb3480803ea306c3e1d7940a8c65. 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/USMH92303647.
Grazyna Bacewicz: Piano Concerto; Concerto for Two Pianos and Orchestra; Overture; Music for Strings, Trumpets and Percussion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc2717e69f68c8fbc34c65ff608a793058280691fa06da7de5932bebf1dd1aa. 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/FINDE2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63148f4590f5f3a0d045297dce50918a4b032fa5099ac0e803fb423c08b1ed28. 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/FINDE2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeca0fecba39c5a7a654b0eb69d3f5c8695e5907b0c08acd2ac0aeda33d485de. 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/FINDE2300018.
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
Bacewicz: Complete Symphonic Works, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3585782d3dfa97f90b5d73b44eccc5c758f0679b2121471260f8853e510950ea. 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/PLA552401204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968f82d47631fb4fa4ff553c9d39799ef5274a86f4fd69f2dfd3fedfcdd685ac. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLA552401205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffeb5e4037d7966d940ecfcd458e3b16da2abde282353f67ed19a1b7515d6a98. 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/PLA552401208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604b091912338e4eca2f4d94f443577dc4038e8798de1e85bff00a4169510020. 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/PLA552401209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5403aba43db2f3eabe16bf2ca64374ab3e824e12781f69b02de4cdca366dedf1. 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/PLA552401210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32238d46b4ea3e4862229f9676e092593f2c7fc3082f4695c437a0e99d5edc0. 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/PLA552401211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8462a8fdadeb07eab4405e5daa9f1b81da8b3c4d33d47c4324efc8932a4bc7c9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/PLA552401206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f893cb7cf2e8092f955c770755f1a3fd3484d8ff817d9931690bc8e4ff7e8c. 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/PLA552401207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef604b2aae6bba8451ec45bcfba8bad513b4421886e91d11875a74b37692c3fa. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PLA552401212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc45a379ff17ee0377dc8d43b60f200c6379f46f6c2b4b789cc51700fdb584f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/PLA552401213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a068ee5046603e9ae55f673ced8f0ce1abcf13f8585094385b39051cc223ce1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PLA552401214.
Sonata for Violin Solo: No. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44d1707ebbf034c539cac4e1ec7a41d0cf05471258fda69a5634a7edba87055. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/PLA552401215.
Sonata for Violin Solo: No. 2: I. Adagio. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7b1644f51ae4a749a09ae7e461574c14c3c484a93c367b281cec65e5442ddc. 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/PLA552401219.
Symphony No. 3: I. Drammatico – Molto allegro energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a1d0b8ec295fb89c7f26a7a2f052097f4e8e5d6197ca0d6a583947bb89e9cd. 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/GBLWD2306101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca09444b701c32d0db09d651cf3684cd7e4a308fe717d8375e74a8db7fbfd1d. 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/GBLWD2306104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f736d8f142017a15640dbc4b16b6baab4843bee7149c1ae7467cfb8c2a004e8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBLWD2306109.
Symphony No. 3: II. Andante – Un poco più mosso – Tempo I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c20158c3472c30d9e21d9b87fbb2fb9bc2bb3f16c16bc45d4eff59d81dfcbb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBLWD2306102.
Concerto for String Orchestra: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb6c818b7c1b3987068f89c9540613d56edb898883d5cc25847beb0b15f1d3c. 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/PLA162279301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33b88b14a066dfaa238c577c9b38f971e2203b6e4782c1140b17f802205d081. 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/US8272200909.
Bacewicz: Music for Chamber Orchestra, Vol. 3
Grażyna Bacewicz: Complete Violin Sonatas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb56685b8dac7f36e4114e17fd172e3022d6392b8d61485600ac1162e2c45979. 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/NLY331806332.
Bacewicz: Two Piano Quintets, Quartet for Four Violins & Quartet for Four Cellos
Grażyna Bacewicz: Piano Works (World Premiere Recording)
Bacewicz: Complete Works for String Quartet, Vol. 3
Bacewicz: Complete Works for String Quartet, Vol. 2 (World Premiere Recording)
Bacewicz: Complete Works for String Quartet, Vol. 1 (World Premiere Recording)
Grazyna Bacewicz Complete Works for Oboe (World Premiere Recording)
String Quartet No. 2: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac6890441d5578d2ccd9879345a60a18fee2af86f38b875c5ff292911143593. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLWD1603304.
String Quartet No. 3: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdc1481d55af996f2e0e5d447653484c471f00727425d0b3af663ee0d60fd2c. 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/GBLWD1603307.
String Quartet No. 4: III. Allegro giocoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef59794646ace7c4d756d538effd26c04ccb30e5aa0ef23b851b5ede06e9a940. 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/GBLWD1603312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa099a9b0221556f8ec5e7f67a5912824d10be81539e636667d6936f92343ef18. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBLWD1603301.
String Quartet No. 1: II. Tema con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3fc38fe3ef87838abe81a040708bc5d135abc6f15920466bedc5582d1a27b4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLWD1603302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4063bfddd2fe195ea96d9d3cb36f038aaaf477c1451b3e4f7a905147e5b2c62e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBLWD1603308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb74e902c5ee08cc4c93b3614f7bae91cf4c30e5712f8a329d5829b691f5486. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBLWD1603310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52304e3708990933d6b40b764707bcde8249265dba6cab79d3a8e3caf2704e82. 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/GBLWD1603311.
Bacewicz: Complete String Quartets, Vol. 2
Bacewicz: Complete String Quartets, Vol. 1
Bacewicz: Symphony for String Orchestra, Concerto for String Orchestra & Piano Quintet No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b131f926beb44a3aa695496abd8d0be76e322497f6d06735a9ad1203f55f0ff. 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/HKI191403301.
Concerto for String Orchestra: III. Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c39ee4ab4fa23799c8bea9d295d66eb4734eb56e7091559b95294823932d6c. 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/HKI191403303.
Symphony for String Orchestra: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da2cc443df57883c3fee72f5967b7c3a5bb258ab0a23966224fa11752bff63f. 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/HKI191403306.
Symphony for String Orchestra: IV. Theme with Variations
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb436a27b813aa730791e61492bb1bf8d1bc86177b6d466f132c59993141c83. 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/HKI191403307.
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Concerto for String Orchestra: II. Andante
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Symphony for String Orchestra: I. Allegro ma non troppo
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Symphony for String Orchestra: II. Adagio
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Piano Quintet No. 1: I. Moderato molto espressivo
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Bacewicz: Streichquartette, Nr. 4, Nr. 6, Nr. 7
Cello Concerto No. 1: I. Allegro non troppo
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Cello Concerto No. 1: II. Andante tranquillo
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Cello Concerto No. 1: III. Allegro giocoso
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Bacewicz: Sonatas No. 2 for violin solo - Violin Sonata No. 4
Bacewicz: Violin Concertos Nos. 2, 3 & 4
Bacewicz: Piano Sonata No.2; Piano Quintets Nos.1&2
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Bacewicz: Violin Concertos Nos. 1, 3 & 7
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Violin Concerto No. 7: I. Tempo mutabile
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Violin Concerto No. 3: I. Allegro molto moderato
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Lydia Mordkovitch Plays Bacewicz & Enescu
Bacewicz: Sonatas, Oberek, Partita & 2 Capriccios
Bacewicz, G.: Violin Sonatas Nos. 3-5 / Partita
Bacewicz: Kaprys Polski na klarnet i fortepian
Bacewicz: Piano Concerto III. Molto allegro