Elizabeth Sombart is a French classical pianist. In her youth she studied at the Strasbourg Conservatory where her first public performance was at the age of 11. She won first prize in National Piano
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 0xe74bf47aef6e9d54c85ef4ec88bb03bbb47a7d30e360c805041f65b70a2e3677. 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/b4ad2670-c227-4dae-a0ab-6c5afb411d23.json and https://artists.proofprofile.net/proofs/artist/b4ad2670-c227-4dae-a0ab-6c5afb411d23.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Les plus belles berceuses classiques (Piano Solo)
Favourite Adagios from the Great Piano Concertos
Nocturnes, Op. 9: III. Allegretto in B Major
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 0xf0a05792f842ac319693347f93b094378e431d04fd7a1e33bb48851d0490924c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBLPF6698385 — a six-check JSON result.
Piano Concerto No. 20 in D Minor, K. 466: I. Allegro (Cadenzas by Luca Belloni)
Mozart: Piano Concertos Nos 20, 21, 23, 27
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d62bf6e84dc88187c4db4f6706795e8929c0358bff2d55d003fba15dbaa3c36. 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/UKGFN2200305 — a six-check JSON result.
Piano Concerto No. 20 in D Minor, K. 466: II. Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f66f5a39645b8fcb9eb32c0332c34c4d10f387afc8acc1204c52f2f9ddc4f82. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKGFN2200306 — a six-check JSON result.
Piano Concerto No. 20 in D Minor, K. 466: III. Allegro assai (Cadenzas by Luca Belloni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc396459c4d22e8c7b19420d8c2c8e51c1b45ed5c704d074c824826a3be13dc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKGFN2200307 — a six-check JSON result.
Piano Concerto No. 21 in C Major, K. 467: I. Allegro maestoso (Cadenzas by Luca Belloni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746b5340bbe3ef22cf0999a9cc5d2869d77893527dbe61c54155d441c47d0ba3. 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/UKGFN2200308 — a six-check JSON result.
Piano Concerto No. 21 in C Major, K. 467: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2218b60b1bcea85ff59dc3206f4b114e7e91b751875f2f494362c8d14b06cb. 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/UKGFN2200309 — a six-check JSON result.
Piano Concerto No. 23 in A Major, K. 488: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8011d4afe062c655f3e96b0d57dea462237b48914a254c76ef6c5b8edbb94f95. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKGFN2200312 — a six-check JSON result.
Piano Concerto No. 27 in B-Flat Major, K. 595: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440fcb508365ed638e23edd858ac462eb4096e231e471fe111edfbec7872693f. 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/UKGFN2200315 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa035f259b57b8d807d91578ad0e4cdd6cc1bb873b88a715e3c623f847169ed63. 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/FRZ059602280 — a six-check JSON result.
Piano Concerto No. 9 in E-Flat Major, K. 271: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3aefdb7f0d52f8c00b2985818964039183201f7185ee1cd3f78b3978641793. 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/UKGFN2400283 — a six-check JSON result.
Piano Concerto No. 9 in E-Flat Major, K. 271: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd90cc1369723a985f5faee0e009c949efb95a6d807de5f4485dbcdf55fd9f5b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKGFN2400284 — a six-check JSON result.
Piano Concerto No. 9 in E-Flat Major, K. 271: III. Rondeau. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc11e1d896b1fd1448c2f9f15c7c027f5e20ce685b4e7019ed4f59f1b556d01b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKGFN2400285 — a six-check JSON result.
Piano Concerto No. 12 in A Major, K. 414: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618cbb0aff444ecb066ce5c9dcf7b6b91cdc7aa4c592f1c4f5d13afbfd3151a1. 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/UKGFN2400286 — a six-check JSON result.
Piano Concerto No. 12 in A Major, K. 414: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5d1b5191a58a90a919855b02d29823aea0c596fb1a9a3eeac963163e0da785. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UKGFN2400287 — a six-check JSON result.
Piano Concerto No. 12 in A Major, K. 414: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1b404e236ca71066963e05d615ceb1ef0634028383076410697301ea95e9e9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKGFN2400288 — a six-check JSON result.