thumb|Walter Susskind (1950) Jan Walter Susskind (1 May 1913 – 25 March 1980) was a Czech-born British conductor, teacher and pianist. He began his career in his native Prague and travelled to London
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 0xda6e773e81cb386e9fd56480e47a804bbce478d603ef40a3bab5781470ee577a. 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/741e3daf-dfff-4108-9e35-4ea951ebf337.json and https://artists.proofprofile.net/proofs/artist/741e3daf-dfff-4108-9e35-4ea951ebf337.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Offenbach, Rosenthal: Gaîté Parisienne, Complete Ballet (Classical Greatest Collection)
Milestones of a Legend: Nathan Milstein, Vol. 9
Mozart, W.A.: Piano Concertos Nos. 13, 17, 19-24 and 27 / Piano Sonatas Nos. 8, 12 and 15 (Schnabel) (1934-1947)
Dvořák, Milhaud & Prokofiev: Cello Concertos - Dohnányi: Konzertstück, Op. 12 - Fauré: Élégie, Op. 24
Fauré: Élégie, Op. 24 (Orchestral Version)
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 0xaa4a9a6ac321c93bb698d5f34e5f10de98dd1fa69763bd61dc3c28214c32f09c. 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/GBAYC1400322 — a six-check JSON result.
Dvořák: Cello Concerto in B Minor, Op. 104, B. 191: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30deff234df3d7932fa2071e23049c5567594d9d543887837bcfcef9b9230b65. 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/GBAYC5600048 — a six-check JSON result.
Dohnányi: Konzertstück for Cello and Orchestra in D Major, Op. 12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c091adb64cb283aff808b626ff4ed5242fa69a0e30f5793eb566456f5f4505. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBAYC0802530 — a six-check JSON result.
Ainsworth, H.: Bay Book of Psalmes (The) / Coolidge, P.S.: Pioneer Dances (A Gift To Be Simple - Music for Early America)
Appalachian Spring: Variations on a Shaker Hymn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7032c2eed737dafe5a8ef802603862de1ffe532647eb296e287d7c36876b2769. 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/GBCJG0400550 — a six-check JSON result.
The Whole Booke of Psalmes: Psalm 4, "Oxford Tune"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a2ff82a882fa3c7af0b1d4c44eeb6fb296a4d99909472d04bf325da2f3a13d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCJG0400568 — a six-check JSON result.
The Whole Booke of Psalmes: Psalm 100, "Old Hundredth"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee2739f4067631f9b2bd75848f08952f17fa88a2a4f3526904a743ceb9e8acb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCJG0400572 — a six-check JSON result.
Copland: Appalachian Spring & Gould: Spirituals for String Choir and Orchestra
Schwarzkopf, Elizabeth: Legendary Recordings
Rimsky-Korsakov: Scheherazade, Op. 35 - Smetana: Prodaná nevěsta, JB 1:100 (Remastered 2024)
Prodaná nevěsta, JB 1:100: Dance of the Comedians - Remastered 2024
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1a5d01b364136620f295f0728af1ccf878853202101f05ef07741904ca30e4. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/HKI192407308 — a six-check JSON result.
Mussorgsky, Mozart & Bruch: Orchestral Works
Haydn, Mozart, Beethoven & Schumann: Works for Horn
Beethoven, Bruch, Mozart & Tchaikovsky: Violin Concertos
Along Gypsy Trails: A Tribute to León Zuckert
Mendelssohn, Bruch, Franck, Fauré & Lalo: Violin Works
Rachmaninov: Piano Concerto, Rhapsody on a Theme of Paganini & Morceaux de Fantaisie
Weihnachten zu Hause: Der Messias, HWV 56
The Complete Solo Studio Recordings (Recorded 1924-1948)
The Planets, Op. 32: I. Mars, the Bringer of War
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c270d7d08af8ac1efa1461e94456b9d649500d414ba840f84033903c5d111c. 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/USZDG0600639 — a six-check JSON result.
The Planets, Op. 32: IV. Jupiter, the Bringer of Jollity
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2a9e693b326dd502c35d7b9b7cbb0d3a633a23ce6fe47010b3d79735ff0c4f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZDG0600642 — a six-check JSON result.
The Masterpieces - Holst: The Planets, Op. 32
Rachmaninov: Piano Concerto No. 2 / Rhapsody On A Theme of Paganini (Rubinstein) (1946-1950)
Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08698332e0ca381a04be4b38101a05d2e872648c97bf4ac3596be50008ee0853. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190815501 — a six-check JSON result.
Purcell: Dido and Aeneas (Flagstad, Schwarzkopf, Hemsley) (1952)
Vocal Recital: Angeles, Victoria De Los - Mozart, W.A. / Wagner, R. / Gounod, C.-F. / Massenet, J. / Granados, E. / Fuste, E. / Turina, J. (1949-1955)
MOZART: PIANO CONCERTO No.20, No.21, No.24, No.27 - PIANO SONATA No.17, No.12
Rosenthal, Offenbach: Gaîté parisienne (Mono Version)
Bruch: Violin Concerto No. 1 in G Minor, Op. 26: II. Adagio (Excerpt)
The Most Peaceful Classical Album in the World...Ever!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae24f9b708629a384d47e891e65b9a7424570812ccc48eac507e1d340c66123. 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/GBAYC9701764 — a six-check JSON result.
Sibelius: Violin Concerto in D Minor, Op. 47: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c98f58d7ec59e220f266c5b1106b29add70a467673918da83ff2f02496a5a58. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAYC1801699 — a six-check JSON result.