Jascha Heifetz (; December 10, 1987) was a Russian-American violinist, widely regarded as one of the greatest violinists of all time. Born in Vilnius, he was soon recognized as a child prodigy and was
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 0xcfb2adba7991d2f7edeecfb8c14ff6ed413b80820bbc198eeac898e039d59d56. 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/c89adc32-84d9-47c8-b204-9fd7328c2638.json and https://artists.proofprofile.net/proofs/artist/c89adc32-84d9-47c8-b204-9fd7328c2638.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
English Suite No. 3 in G Minor, BWV 808: IV. Sarabande (arr. for violin and piano)
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 0xaf82f8338337ecb1fd3013789fe88e99bf0459e54566855f14f1ec5255c9d15d. 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/HUA253167801.
Triakontameron: No. 11. Alt-Wien (arr. for violin and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9088b9fa2a7ff7a3fcd8db00cfb13b53023e9f7fd4e1d3666b8cb1beb361ec79. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HUA253167808.
Porgy and Bess (arr. J. Heifetz): Act 1: Summertime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe210f557c9314b95bbe0a6447f0ba5de2527fa29a0b04b7ef8e3a59210109977. 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/HUA253167818.
Vitali: Chaconne in G Minor - Tedesco: The Lark - Fauré: Sonata No. 1, Op. 13, in A
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3f0dfd38d683081aca23e656b928f46ec66f405d60cbf31e5d50e354859387. 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/USBC15000236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea0a54f7f2d17b77ad56f29acc5df179adca209acea3f77c9b34d56c51db2ff. 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/USBC15400244.
Sonata No. 1, Op. 13, in A: Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2a1426400bd8267484c14f088ef446b10a6c3cef37740f63304511fa9d6c0a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USBC15500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4562958060050e0447fe8a8e02f392f8cf0c5feb57f4f4d2cbeca1c5146c576. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USBC15500202.
Sonata No. 1, Op. 13, in A: Allegro vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf65df21ab31b41dad568c44b6cfdf69b39e5996be021a4aec1726dae9a33395. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USBC15500203.
Sonata No. 1, Op. 13, in A: Allegro quasi presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f6a87401e852e17b05d452334771104790286a0ea4ea394e3a608c92dbdd76. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC15500204.
Tchaikovsky: Violin Concerto in D Major, Op. 35: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaed5d645865630dee8b0ec4b94c0f694b758ba99f99e4e585245e5bf4882b9. 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/GBAYC0600796.
Mendelssohn: Violin Concerto in E Minor, Op. 64, MWV O14: I. Allegro molto appassionato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4992573bea4a7c95f882b261ea74d736b3bbbf364c5fd727f7666969f1ce36. 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/GBAYC0600383.
Glazunov: Violin Concerto in A Minor, Op. 82: IV. Animando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17e73f9e985c85d0ad489bb0218bd75a479d051b277b1bcbf368f9c6a974f87. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2001401.
Wieniawski: Violin Concerto No. 2 in D Minor, Op. 22: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d52a25fe82cff4ddaada6df9194f3488b519e1b10500703b5c43c9c706825d. 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/GBAYC2001402.
Heifetz Plays the Best of Bach, Mozart, Paganini & Vitali
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9766aa39b9022236c8213dedc1f0be76bd923b68c97d9c007920a9fd48a6176b. 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/FR6V81843593.