Christian Zacharias (born 27 April 1950) is a German pianist and conductor who made an international career. Music career Zacharias was born in Jamshedpur, India, on 27 April 1950. He studied piano w
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 0x4e9df50ae4b726a273820c69f5ab068c306246e5e2e36aba3416b7eaeb521ac6. 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/e6740cdd-03d5-4b55-a6ff-3d881100a310.json and https://artists.proofprofile.net/proofs/artist/e6740cdd-03d5-4b55-a6ff-3d881100a310.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Mozart: Piano Concertos Nos. 8 "Lützow", 9 "Jeunehomme", 12 & 14
Mozart: Piano Concertos Nos. 5, 6, 11, 16, 17, 18 & 19
Mozart: Piano Concerto No. 16 in D Major, K. 451: I. Allegro assai
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 0x5da9ba94b68c8ddf6525e11158e4d5f2ebbc081e2f9b50b10c084b5160c632c3. 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/DEC628900442 — a six-check JSON result.
Mozart: Piano Sonata No. 15 in C Major, K. 545: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4b55908b8977ccc16fdaf67b826e1543721725f1b236be31145d7ab50136f2. 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/DEC628400967 — a six-check JSON result.
Mozart: Piano Concerto No. 26 in D Major, K. 537 "Coronation": I. Allegro (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaf21845d620cce25d581288aec9a95509e6c624a541ad001614af62469e6dc. 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/DEA340501156 — a six-check JSON result.
Piano Quartet in G Minor, K. 478: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483f10571f1838944417f5237e1011774c25f77ad27ecaee2531a022659ce27a. 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/DEC628800716 — a six-check JSON result.
Mozart: Piano Concerto No. 21 in C Major, K. 467: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b9d2c5dadc2bfe92739c16140c0007a8127b8c4d7926d96dfd86b4be7d49b5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA348900083 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b9d2c5dadc2bfe92739c16140c0007a8127b8c4d7926d96dfd86b4be7d49b5. 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/DEA348900083 — a six-check JSON result.
Piano Concerto No. 5 in E-Flat Major, Op. 73 'Emperor': II. Adagio un poco mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db069bd550aee8414b2bcaa246cb7c515cb65170a784957dee773ba5b4189c4. 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/DEC628800077 — a six-check JSON result.
Piano Quintet in E-Flat Major, Op. 44: II. In modo d'una marcia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef112c93f30f8120ca6a886870ddc4733b0e527d528bbdf8f4dce6f1fde6f684. 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/DEC629100561 — a six-check JSON result.
Mozart: Piano Concerto No. 19 in F Major, K. 459: I. Allegro
Grieg: Morning Mood - Albinoni: Adagio - Gluck: Dance of the Blessed Spirits - Bach: Jesu, Joy of Man's Desiring & Badinerie - Charpentier: Te Deum - Bizet: Les toréadors & Other Classical Hi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0baf306c4573026b341f02550754aef6f5b05ea1feeed904d77e174b5748468. 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/DEC628900445 — a six-check JSON result.
Piano concerto No. 3 in C Minor, Op. 37: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0883e9617015443ca67396e0d9f59a1a38314edc5b851acb578147f965717924. 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/DEC628800722 — a six-check JSON result.
Mozart: Piano Sonata No. 11 in A Major, Op. 6 No. 2, K. 331 "Alla Turca": III. Allegretto. Turkish March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199dfe4ae4d14205e1a897a774d40efbf53e490f336014a7944b61f2ca15132c. 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/DEC629500339 — a six-check JSON result.
Beethoven: Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": II. Adagio un poco mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd693713a1cdd1e5ee4ceb832a5ca9f98260acac49578c4b5c15e079e2ae5eaa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEA340702211 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b9d2c5dadc2bfe92739c16140c0007a8127b8c4d7926d96dfd86b4be7d49b5. 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/DEA348900083 — a six-check JSON result.