Jonathan Biss (born September 18, 1980) is an American pianist, teacher, and writer based in Philadelphia. He is the co-artistic director (with Mitsuko Uchida) of the Marlboro Music Festival. Early l
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 0x11e4161db22687a33c4eba9b378cccf951873fe7ead09c5328f85394f25a02fe. 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/64bc5383-e05b-4c3e-8b4b-33db92c0116c.json and https://artists.proofprofile.net/proofs/artist/64bc5383-e05b-4c3e-8b4b-33db92c0116c.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 0xbc1a9e868eb4dcad2e1d5557f325b12a3f7e6c2461401cdd50569d2fa40d885c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBNVV1400043.
Davidsbündlertänze, Op. 6: XVII. Wie aus der Ferne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e95968a4b443fa2f42da55c72b68f11d001cb105fdb0b0d3371efea31f8aea8. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/GBNVV1400069.
Schumann / Janácek / Berg - Wigmore Hall Live
Schumann, Janáček & Berg (Wigmore Hall Live)
Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": II. Adagio un poco mosso - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfedcd6cb5c0bbce3eb0d9d77fa3c73ea894b47c6964ea527d6f07611d801861. 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/GBYDS2400206.
Piano Concerto No. 1 in C Major, Op. 15: III. Rondo. Allegro scherzando - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552dd695c94a11ff21ccef833b9a90ee4fccc44a48d554c156bd63a9001e30e2. 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/GBYDS2400758.
Piano Concerto No. 2 in B-Flat Major, Op. 19: III. Rondo. Allegro molto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be02cdea278cb4d5a654d59a1bec46f5b493f2bf94603e4ef36e00e4715bfbb. 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/GBYDS2500127.
The Blind Banister: I. Sliding Scale - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea526cdc695a4a7928af1d4e19f5d425bcea803ae104b16b28583f05969e441. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBYDS2500128.
The Blind Banister: II. Ringing Weights - Coda. Teneramente - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d61ee5ed11d4d5b4437ca8adccf2c42934557be1e059356664e187db874769a. 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/GBYDS2500129.
Piano Sonata No. 8 in C Minor, Op. 13 'Pathétique': II. Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2f49489e5b68d4c435fefb9872047d65cb5d0bd78f6d6bb3bcb2e43f67891b. 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/GBAYC0702483.
Kinderszenen, Op. 15: XII. Kind im Einschlummern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19e691b51ecb28852b61e767deb89054af45fecc063e3318177a3aeeccac443. 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/GBAYC0601616.
Piano Sonata No. 15 in D Major, Op. 28 "Pastorale": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a0a4a048e550bba2037b31838c0a48af224a262ca4c410ddb82469d1abd05d. 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/GBAYC0702487.
Piano Sonata No. 30 in E Major, Op. 109: I. Vivace - Adagio espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3384677fcdc77804c60f0d362098c858dd54ce347d23d9fd29af71dc354e8c32. 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/GBAYC0702494.
Piano Sonata No. 30 in E Major, Op. 109: II. Prestissimo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1340c3774c96922f65b52bf9c800f34a98a17ad69569c568f88001a65e19bd. 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/GBAYC0702495.
Piano Sonata No. 30 in E Major, Op. 109: III. Adagio molto cantabile ed espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a05cbeabfb3f9578445d4ca6f291c4eec38d0c3684d77960b0216d952cbd618. 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/GBAYC0702496.
Mozart: Piano Concerto No. 21 in C Major, K. 467: I. Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d029ed939900c0a18567db3c66d7e6cb8e2f623b828799dafded31cae5dad43. 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/GBAYC0801625.