Esther Yoo (born 11 June 1994) is an American violinist. Early life and education Born in the United States and raised in Europe, Yoo began playing the violin at the age of 4 and made her concert de
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 0x80cff04bc22ce2f8ff42bb7c23f54e3915c160829897ad3932cea20519279bcd. 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/238779a5-9206-43ac-95db-7f49a6b7c2a6.json and https://artists.proofprofile.net/proofs/artist/238779a5-9206-43ac-95db-7f49a6b7c2a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x5754317d129296f133788461646499e916681f25f418979ca9678a70bb007840. 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/USUG12203294.
On Chesil Beach (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa237164361e86cae5b616186c73326a6895e4438c9ddea17f0a6c82e2ebf2467. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2118e33db1c405996d6fcb46068df9809a98e84f0d17eec584b0ff889d2809da. 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/GBBBA1800078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc02cf6330d134c906094a0631ca57b32b27180120c7a2c53c18b4135c42e99. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBBBA1800097.
Violin Concerto No. 1 in G Minor, Op. 26: I. Vorspiel. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa249111f77fd5584270da70e0908321ad93653e002022f5a6665c0b350656cac. 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/KRUM72200579.
Violin Concerto No. 1 in G Minor, Op. 26: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b576534c9ee850363f101e7ebcf75b1f9cb9802c77326c627768d23f7255aa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRUM72200580.
Violin Concerto No. 1 in G Minor, Op. 26: III. Finale. Allegro energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587c1b5443e2e672f947d84e9230bbfbd00bae08aabb75ce85f92e4309041d9a. 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/KRUM72200581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eae79b32ce770558901489f8f299b2d1bef323e624d099ea77023ca0d6594de. 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/KRUM72200582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aaeb2a63d222c7d3e3a861d2ef211aebff860dfa22c4911d907e54ee5b1b304. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRUM72200583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633aef9cb50e2ab446cd9b6543faeb816fc5b9ae407c15d64d928fe57e12d4ee. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/KRUM72200584.
Violin Concerto, Op. 14: III. Presto in moto perpetuo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8993486601b804a42445f3645593021e700368362aec1672d569898bd97a9a03. 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/KRUM72200585.
Souvenir d'Amerique, Variations on "Yankee Doodle", Op. 17
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b9aea33597a9d6fcf273d4ad12cf680a6accaad13f570534e2861686edb5e0. 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/KRUM72200586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa237164361e86cae5b616186c73326a6895e4438c9ddea17f0a6c82e2ebf2467. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800072.
String Quartet in G Major, Hob. III:81 (Op. 77 No. 1): 1. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe703a86f73e200662f123c9df4fcbb93f81ba3481fe7b60914892f74c2798952. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03a460eccaed89dd03ec4c3a22871adb85694edead47ca087809673e261c1c3. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBBBA1800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0650952e5b4e5d8298d9b69aaf7be5e4de3a190cf905143d07e5b0c08c30cda. 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/GBBBA1800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2118e33db1c405996d6fcb46068df9809a98e84f0d17eec584b0ff889d2809da. 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/GBBBA1800078.
String Quartet in B Flat Major, Op. 130: 6. Finale (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194cb3a8ae8d839b60a52fd828dd8481dc2cc7871be3b46b455c44b3793dfb16. 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/GBBBA1800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45c242922e066714126c1df8d6234fd9070411b6fcf0d9e2b15903021ef9a0d. 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/GBBBA1800081.