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 0x5730cd0d8530d357fb27f912da5bb0991acc3f456bf7461beab20b1202457e5f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8220f10b-1f80-4cde-8821-3d9478a927e7.json and https://artists.proofprofile.net/proofs/artist/8220f10b-1f80-4cde-8821-3d9478a927e7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Huber: Phantasie Op. 17, Sonata No. 5 & 6
Huber: Piano Quintet No. 1 in G Minor, Op. 111 & Piano Quintet No. 2 in G Major, Op. 125
Hans Huber Early Works for Orchestra (World premiere recording)
Hans Huber: Works for Violin, Violoncello and Piano
Hans Huber: Piano Quintets Nos. 1 & 2 (First Recording, Deluxe Version)
Hans Huber: Works for Violoncello & Piano
Huber: Piano Quintet No. 1, Op. 111 & Piano Quartet No. 2 in E Major, Op. 117, "Waldlieder"
Huber: Piano Concerto No. 1 in C Minor - Piano Concerto No. 3 in D Major
Huber: Symphony No. 2 in E Minor, Op. 115 & Overtures
Symphony No. 1 in D Minor, Op. 63: I. Allegro ma non troppo
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 0x1f937826205a5bb426027f380055b5192c5c43e5649ad36cd37421cca405a93f. 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/SEWSJ1650386 — a six-check JSON result.
Symphony No. 1 in D Minor, Op. 63: II. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a20bb68ec30d4f28e5de8e91cd58d87df6a68fafbeb05f40a68f840327397b. 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/SEWSJ1650387 — a six-check JSON result.
Symphony No. 1 in D Minor, Op. 63: III. Allegretto - Im langsamen Hochzeitmarschtempo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22baf1676c17269c19b500507d55bbbd39355ff507d989017e89083c817469b. 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/SEWSJ1650388 — a six-check JSON result.
Symphony No. 1 in D Minor, Op. 63: IV. Andante - Allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5124a0c17a9e5fb3c2996b9f73c0447ccf15b7cfb8841ebe2c986b07072a6165. 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/SEWSJ1650389 — a six-check JSON result.
Huber: Sinfonie Nr. 3 C-Dur, Op. 118 "Heroische"
Huber: Vier Gesänge für gemischten Chor mit Begleitung des Pianoforte, Op. 93: No. 2, Nixenreigen
Serenade No. 2, Winternächte, WoO (Live)
Symphony in D Minor, Op. 17: III. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0473cf6a348f8cea0f39201383f3989180ca50cac4b82b291274a072c6a9074b. 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/SEWSJ1650517 — a six-check JSON result.
Stilles Leuchten - Swiss Choral Music of the Late Romantic Era
Vier Gesänge für gemischten Chor mit Begleitung des Pianoforte, Op. 93: No. 1, Die Nacht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef6969a58fe9f56515f89d9e100f60e6c6e60a69c6d1699e6839e41466b5039. 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/CHE272402697 — a six-check JSON result.
Drei Lieder älterer Dichter, Op. 16: No. 3, Winters Ende
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8429659f51ed58b86b25595de70c33e55c8ffe4634081f407842ddec18de0b62. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CHE272402703 — a six-check JSON result.
Des Abends, da kann ich nicht schlafen gehn (arr. G. Heidloff)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2427e66aad3b04190d33f2a396757067646ea904dc7da1555021b01083e822f6. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/DEU920551615 — a six-check JSON result.
Danses suédoises, Op. 63: II. Ruhig bewegt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4227afd1fe3e4d787a172bd711d4411c8e207c97fce5d2782099b666702d746f. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CH1261550119 — a six-check JSON result.
Danses suédoises, Op. 63: XII. Langsam, nicht schleppend
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe649ff0158307306578b07c5ac7e93689d7cc06676bc04d501029111c4a1260f. 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/CH1261550129 — a six-check JSON result.
Danses suédoises, Op. 63: XIV. Gehend, ruhig bewegt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e2c8b8884f02dd6b248e3be083443704c209049e19d72358d4519d98d3414a. 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/CH1261550131 — a six-check JSON result.
Folksongs of Another America: Field Recordings from the Upper Midwest, 1937-1946
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee618788deb385f80721a77d94e37391851798b5724e9f006efa8f8263908ccf. 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/QZANV2000953 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43569d4d25dd4272eb56e084e548f80018e591296fc301759b62608ce66d9d0c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEU920656020 — a six-check JSON result.
H. Huber, A. Mendelssohn, M. Moszkowski: Trios (World Premiere Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048a4b0095fed3f254bfe9c16091e9a3447f28ecd16d2d11bcfe4800dc7f746e. 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/UKL8J1700072 — a six-check JSON result.
Sonata for Cor Anglais and Piano: I. Langsam - Allegro pesante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb857f2e6fe8d314fafb88fd07954c043b5f6b1d18568d244f0bfec2d90a4796a. 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/UKL8J1700081 — a six-check JSON result.
PROSPERO Catalogue 2024 - Our Listening Tips II: Various Composers
Wartensee: Der Friede - Huber: Aus Mirza-Schaffy-Album - Andreæ: Lieder Aus Den Sammlungen
Musique et nature au Château de Gruyères (Music and Nature): Liszt, Hünerwadel, Hahnemann, Huber, Bovy-Lysberg, Boissier-Butini, Ruthardt, Adler & Raff
Lieder us um Tal - An Homage to Swiss Art Song
Raiser, Christian-Markus: Romantic Organ Music
Schweizer Bläserquintett plays Paul Juon & Hans Huber
Weber, Messe du Freischutz, Mass from Freischutz
Schumann: Papillons - Kirchner: Romanzen - Huber: Stimmungen, Op. 35 - Liszt: Müller-Lieder Von Franz Schubert
The Instrumental Radio Collection, Vol. 2