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 0xdbe66d17d19b2e4bcc3d5f4bbc8c06eff0db4593eb58b73c17903d3116b5b2e1. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d7c173c-a72d-4e55-88da-c17a5d049351.json and https://artists.proofprofile.net/proofs/artist/9d7c173c-a72d-4e55-88da-c17a5d049351.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Voyages. Piano Music from the Golden Age
Vestiges. Piano Music from the Golden Age
Women of Piano. Great Female Pianists of the Golden Age, Vol. 4
Piano Pieces, Op. 118: No. 4, Intermezzo - Triphonola 52739
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 0x4b3c7566ecef987e899f9c3fbff44822eeb0ca7158fe8f4b1619b63ecddac590. 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/DEPI82323250.
Piano Pieces, Op. 119: No. 3, Intermezzo - Duo-Art 6911
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ed6ba8a4f9d635cf5e04380b1cca95641ff7129f20808a7c03d42b522577a9. 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/DEPI82323251.
Oubliée. Heritage Piano of Liszt, Chopin & Rachmaninoff
Schmetterling. Piano Music by Chopin, Schumann and Legacy
Lyrische Stucke, Op. 43: No. 4, Voeglein Birdling (Little Bird) - Welte-Mignon 1277
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b21ad19a0f9045300ceb071353c1f4d67e6a339e6b0e880f1fe0c09d0fb189. 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/DEPI82321819.
Humoresques, Op. 101: No. 7, Poco Lento E Grazioso (G♭ Major) - Welte-Mignon 1324
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9096f333927684020789f1869b89a8ebb9a83879a2a3b701af77d93f9f63d51. 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/DEPI82305943.
Impromptu No. 1, Op. 29, A-Flat Major - Welte-Mignon 455
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f94754439d5c0fc934c49eb4a5740588aecbaf3766451f571f44eb6ff6e7eb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEPI82319203.
Preludes, Op. 28: No. 3 in G Major - Welte-Mignon 3184
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567e84d2a6c4852e82c443d91aced819d72f904401689e345ca6f79d8b9ba3c9. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/DEPI82307341.
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
Der Erlkonig S. 558 - Upon Piano Roll Welte-Mignon 1260, Issued 1906
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d3c2f5df043fb569481a0f8b7f8613b69c36302482ffa0dc522195aa080e60. 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/DEPI82435230.
Fantasie, Op. 17 in C Major: I. Durchaus Phantastisch Und Leidenschaftlich Vorzutragen - Upon Piano Roll Welte-Mignon 361, Issued 1905
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3896b50935167d2da56dc213d5995ed87cfdcfcc5b9691619a003a61965ebf5. 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/DEPI82435229.
Women of Piano. Great Female Pianists of the Golden Age
Women of Piano. Great Female Artists of the Golden Age
Idyll. Heritage Piano Music of Beethoven & Schumann
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaabdc30d3350a4feef2afd2c6d0ea74bd3337a8665f10e1907e9c606a80e5e. 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/DEPI82406033.
Flute Sonata in E Minor, BWV 1034: III. Andante (Arr. For Piano by Irene Cantos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120e17a89261c52ab156b141ba71012508f52a49e32191263cf1c2e185dac8d8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEPI82308039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b5484c3ad0697c48d171cea2c0028481bd1fbe20c97e0fadcf9b004f316e96. 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/DEPI82321785.
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part II - Upon Piano Roll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616b38ade73ae1a46360a438caa2be4c340534de270f8ee968f5334ee9c6cac8. 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/DEPI82312783.
Suite for Harpsichord, No. 14: Gavotte Varie - Welte-Mignon 540
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b7c9ac935837e5cd066c6fcd1310dac642ffebdd422058af20d6878ad2e205. 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/DEPI82320111.
Fleurettes. Piano Essentials from the Golden Age
Coppelia. Brilliant Piano from the Golden Age
Spianato. Piano Music of Chopin, Schubert & Rachmaninoff
La Fontaine. Liszt and Bach from the Golden Age
Am Stillen Herd. Opera Transcriptions from the Golden Age
Romanze. Heritage Chopin, Grieg & Tchaikovsky
The Seasons, Op. 37a: No. 6, Barcarolle (June) - Duo-Art 7128
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e3b3d7cf60e3a783c932f712abcae54a55011efee22c1c77f737f9516e1d9c. 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/DEPI82308084.
Moonlight. Piano Evocations from the Golden Age
Kaleidoscope. Op. 40, No.4 - Duo-Art 6845
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510ffa0513b898d9157adeb782cf7f102cac6c823d94f554fbed21bc8c7a3d39. 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/DEPI82454122.
Preludes, Book II: No. 6 General Lavine (Eccentric) - Duo-Art 0345 Br
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6e291985e0c36e88160a01482a255ecc042a9f0bb37264382178ec37abb2bf. 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/DEPI82451739.
Aus Dem Volksleben, Op. 19: No. 2, Norwegian Bridal Procession - Welte-Mignon 1276
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c4fe955f9a944df7f40e06f301e9fdf1a46255a07d15876078bb0154f1a803. 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/DEPI82454112.
Piano Sonata No. 11 in A Major, K.331: I. Theme, Andante Grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb09eb18ff0ff5bff63b6fd8939666110ab48e06b55fb0309053277d4082780. 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/DEPI82454117.
Piano Sonata No. 11 in A Major, K.331: III. Alla Turca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2669264f4a24e58df3bc9144abadfc4174fc2988825995850846e125af905862. 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/DEPI82454119.
Piano Sonata No. 14, Op. 27, No.2 "Moonlight": I. Adagio Sostenuto - Duo-Art 6929
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab649b33d13c350b9da6bbff82d6c5548a0ff51f2a93548e8d82c100f7f0c54b. 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/DEPI82451741.
Piano Sonata No. 14, Op. 27, No.2 "Moonlight": II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429c69a1c39e4b29ee29afbca76bebaaf3c70b8a6b7b7e94688eab1877853670. 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/DEPI82451764.
Organ Concerto in D Minor, BWV 596 (Arr. Solo Piano by Zadora): Part I - Duo-Art 66970
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2fef815177de251c6bee05cf47b570f77027670f56535854b427664797fffe. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82451740.
Organ Concerto in D Minor, BWV 596 (Arr. Solo Piano by Zadora): Part II - Duo-Art 67190
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cf0480f25a1556d8e99d60dc603d1c2f0e1c01e40bb25c29adbfd199f72552. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEPI82454115.
Butterflies. Chopin, Liszt & Contemporaries. Piano Essentials from the Golden Age
Etudes, Op. 25: No. 1 in A-Flat Major, 'Aeolian Harp' - Duo-Art S-3032
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46beab7084bfbeb54eb415b44629840c26662d3f40d6b3c6b557e3c9fde5068b. 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/DEPI82326728.
Aquarelles. Piano Music from the Golden Age
20th Century Masterworks - Techno-Parade