Christoph Hammer (born 12 June 1966) is a German conductor, forte piano player, musicologist and specialist of historically informed performance. Life Youth Born in Ensdorf, Hammer passed the Ab
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab5f32e271cd28c2a09252f1e6d9b6b1e89ab34b26ad1a632f4aa20c8364668. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1aeb6e6e-1e31-4131-882d-86813784c10a.json and https://artists.proofprofile.net/proofs/artist/1aeb6e6e-1e31-4131-882d-86813784c10a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schubert: Die schöne Müllerin, Op. 25, D. 795
Die schöne Müllerin, Op. 25, D. 795 (Arr. for Voice & String Quartet by Anonymous): No. 6, Der Neugierige
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dfc785dc9c035b17d7a6a3a54aeb008db94c0829df102a71f7931bf939b4c0. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEAD62306826.
Lachner, F.P.: Sangerfahrt / Der Sanger Am Rhein / 6 Deutsche Gesange
Introduction, variations brillantes et rondeau de chasse, Op. 202: IV. Variation 2 brillante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7f2f8ace4cb5986a8b4e2990f64e2af18e31669377a7132513399fcb4d979d. 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/DEQG42399296.
Mozart Era (Meister Der Mozart-Zeit) - Kraus, J.M. / Naumann, J.G. / Salieri, A. / Rosetti, A. / Dittersdorf, C.D. Von / Gluck, C.W.
Telemann, G.P.: Cantatas for the Church Year After Trinity (Harmonischer Gottesdienst)
Ferrandini, G.B.: Catone in Utica [Opera]
Keyboard Sonata in F Major, Wq. 48 No. 1 "Prussian Sonata No. 1": I. Poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88d229dd99dd6d6b15e5d3a8affeb6f8ef5c10caa90a3cf32a964b9d826dd83. 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/DEAD61630001.
Keyboard Sonata in F Major, Wq. 48 No. 1 "Prussian Sonata No. 1": III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440bf22db6cece303df2ddb0fed06b1c9b7bb852b0d160d1ccca6036c1f5c578. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEAD61630003.
Keyboard Sonata in B-Flat Major, Wq. 48 No. 2 "Prussian Sonata No. 2": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0245a20f1c1ca900961594d2374b7ec8b4c7ddf2e41d9e5a03b686566b2435bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEAD61630005.
Keyboard Sonata in B-Flat Major, Wq. 48 No. 2 "Prussian Sonata No. 2": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e76e475eaa97715ef91a581d589a5fe8e93f77db39f76a9e12e459511a0122. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEAD61630006.
Keyboard Sonata in E Major, Wq. 48 No. 3 "Prussian Sonata No. 3": I. Poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10c09bb463e73221f49a22c5de62cb3b46fd98f04a572900f6d4957a4fc60f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEAD61630007.
Keyboard Sonata in E Major, Wq. 48 No. 3 "Prussian Sonata No. 3": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd66efaf31119481c4fee1dc4eb9dc6ec159372ed35893043645cdd1a8b9fe5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEAD61630008.
Keyboard Sonata in C Minor, Wq. 48 No. 4 "Prussian Sonata No. 4": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a403eea46975b79783b0fcb4183daed4ffce49efda5cc0e57fd76f210fa20e3. 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/DEAD61630011.
Keyboard Sonata in A Major, Wq. 48 No. 6 "Prussian Sonata No. 6": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec55777f5b0dff1d23f03f2e66fdc5d48729871f8661a9db82532d49b05beb26. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEAD61630017.
Keyboard Sonata in A Major, Wq. 48 No. 6 "Prussian Sonata No. 6": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb176a4a3e6da9ee4c9a1e5575979adaa46e3d0ea273c20161e80fc2c7d8b625e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEAD61630018.
Keyboard Concerto in C Major, Wq. 112 No. 1: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daccce5e612088afe4cc23cf4d069b525ae26266564d72e915220c3adbe98e6. 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/DEAD61630020.
Handel: Utrecht Jubilate & Utrecht Te Deum (Live at Cathedral of Brixen, 8/12/2008)
Teyber, M. Haydn & Cannabich: Choral Works
Fascination Opera: A Virtuoso Firework of Fantasies & Variations
Piano Improvisations - Christoph Hammer Plays an Original Fortepiano
Mendelssohn: Early Works for Piano & Strings
Flute Sonata in E Minor, Wq. 124, H. 551: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03483fdee8d00ed859e732f97d6c68ec54a6160c453640b999d078e35e3458fa. 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/DEA551534246.
Flute Sonata in E Minor, Wq. 124, H. 551: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164c49e129995b8b885fcfcffaa93b31119df769d44ab9d78b6328b3a855878b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEA551534247.
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
Hummel, J.N.: Piano Sonatas Nos. 2 and 3 / Variations, Op. 57 / La Bella Capricciosa
Toeschi, C.J.: Symphony in D Major / Danzi, F.: Piano Concerto in E-Flat Major / Wendling, J.B.: Flute Concerto, Op. 4
Donnerode, TWV 6:3, Part I: Wie ist dein Name so gross
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5b2670118ef493d39069cfa324498dff408adae154c224ecf694022e8ab5e7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USB8U1013043.
Brixi: Missa Di Gloria / Organ Concerto No. 1
Telemann, G.P.: Cantatas for Easter and Pentecost (Harmonischer Gottesdienst)
Torri, P.: Baviera (La) / La Publica Felicita / Egloga Pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dc4ee0ff3fdc937ff633cba58b977504372b7041ae5abd7040f36bc1086849. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEOV11805302.
Field Notes: Relaxing Music for Country Walks