Hummel may refer to: People Hummel (surname), origin and list of people with the surname Hummel Companies Hummel International, a Denmark-based sporting goods and apparel company Hummel figurines
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 0x07468c74ea17b6385ec1bf1590bc5aaca67edc837dfce6ed9d565ed05a254efa. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6341a5b7-9a67-4f87-b2df-7b193c9def8e.json and https://artists.proofprofile.net/proofs/artist/6341a5b7-9a67-4f87-b2df-7b193c9def8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johann Nepomuk Hummel: Septet No.1 in D minor, op. 74
Johann Nepomuk Hummel: 3 sets of Variations for piano, op. 1
Johann Nepomuk Hummel: Variations for Piano on a March by Cherubini in E major, Op. 9
Johann Nepomuk Hummel: Variations for Piano on God Save The King in D major
Johann Nepomuk Hummel: Variations and Rapsodique, (S.164)
Johann Nepomuk Hummel: Variation from Rule Britannia, (S.187)
Johann Nepomuk Hummel: Variation No. 16. from Diabelli's Waltz (S.161)
Johann Nepomuk Hummel: Trumpet Concerto in E, S.49
Johann Nepomuk Hummel: The Scotch Contradance-Rondo in G,(Op.posth.3)
Johann Nepomuk Hummel: String Trio in G Major, S.46
Johann Nepomuk Hummel: String Trio in Eb, S.30
Johann Nepomuk Hummel: Sonata for Viola No. 3, op. 5
Johann Nepomuk Hummel: Sonata For Piano, No. 1
Johann Nepomuk Hummel: Six Bagatelles (Op.107)
Johann Nepomuk Hummel: Rondo Brillante for Piano in B minor, op. 109
Johann Nepomuk Hummel: Rondeau Villageoise (Op.122)
Johann Nepomuk Hummel: Rondeau La Galante for Piano
Johann Nepomuk Hummel: Premier Overture in Bb major, op. 101
Johann Nepomuk Hummel: Potpourri for Piano, op. 47
Johann Nepomuk Hummel: Potpourri for Cello & Orchestra in G minor, op. 95
Johann Nepomuk Hummel: Potpourri - Die Eselshaut No.2 in C major for Piano, op. 59
Johann Nepomuk Hummel: Potpourri - Die Eselshaut No.1 in C minor for Piano, op 58
Johann Nepomuk Hummel: Piano Trio No.7 in Eb (Op.96)
Johann Nepomuk Hummel: Piano Trio No.6 in Bb (Op.93)
Johann Nepomuk Hummel: Piano Trio No.4 in G (Op.65)
Johann Nepomuk Hummel: Piano Trio No.3 in F (Op.22)
Johann Nepomuk Hummel: Piano Sonata No.5 in F# minor, op. 81
Johann Nepomuk Hummel: Piano Quintet in Eb major, op. 87
Johann Nepomuk Hummel: Paganini Fantasy (S.190)
Johann Nepomuk Hummel: Introduction and Rondo for 2 piano (Op.posth.5)
Johann Nepomuk Hummel: Introduction & Rondo Brillante for Piano & Orchestra in A Major, op. 56
Johann Nepomuk Hummel: Impromptu for 2 pianos, (S.205)
Johann Nepomuk Hummel: Grand Rondo Brillant for Flute and Piano, (Op.126)
Johann Nepomuk Hummel: Fantasy in G minor, (Op.123)
Johann Nepomuk Hummel: Fantasy for Piano in Eb Major, op. 18
Johann Nepomuk Hummel: Cello Sonata in A, (Op.104)
Johann Nepomuk Hummel: Capriccio (Op.posth.6)
Johann Nepomuk Hummel: Adagio, Variations, & Rondo on A Pretty Polly, op. 75
Johann Nepomuk Hummel: 3 sets of Variations for piano, Op. 3
Johann Nepomuk Hummel: 3 Pieces for Piano Trio, op. 111a
Johann Nepomuk Hummel: 3 Fugues on the Style of Handel, op. 7
Johann Nepomuk Hummel: 2 sets of Variations for piano, op. 2
Johann Nepomuk Hummel: Rondo Favori for Piano in Eb major, op. 11
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 0xd21795cba6f0784554ee2309ad5b10f88ce2c583650472f0426ea0367e975041. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NZLP00400810.