Hans Sitt (born Jan Hanuš Sitt on 21 September 1850, Prague – 10 March 1922, Leipzig), was a Bohemian violinist, violist, teacher, and composer. During his lifetime, he was regarded as one of the fore
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 0x15884b057dd57cd24fbbf41e7d9b3812aabb9f3293433e8eac2a4f6231a523ac. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9d18dfe-e51f-4d7e-894d-f695cb9b7127.json and https://artists.proofprofile.net/proofs/artist/e9d18dfe-e51f-4d7e-894d-f695cb9b7127.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x6f036f94eb990ff946bd455df5409ad885588e2143a1b10a2aee6003e120f574. 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/QZNWY2482670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3ff46a21c4d0ec052c8c66adad61e85d6614d3d98330cd8d4ab4b773b8b386. 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/QZNWY2482672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8ca79ff69bf760036f3f794dba288edb35d91b48256183655ccc61896625aa. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZNWY2482671.
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
Albumblätter, Op. 39: No. 2, Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c2d552a2d69ebadab2bd07d56608b54bc549d08e9f95eb908020b03cb10889. 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/ES25S2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16df17445778dea6439894215ec0a59efb6c7b9760b0cf1b7f30e56d5b9570d6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES25S2300068.
Hans Sitt: Phantasiestüke und Albumblätter [Bratsche und Klavier (Viola Repertoire)]
Sitt: Albumblätter, Op. 39: No. 2, Andante Sostenuto
Short Stories - A Collection of Romantic Violin Pieces
Peer Gynt-Suite Nr. 1, Op. 46: I. Morning mood
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51529e338c5dd8a3ef874b1d5210d2921c843e4f7a3b2075efd61edebfb8efc. 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/HKI190236001.
Peer Gynt-Suite Nr. 1, Op. 46: IV. In the Hall of the Mountain King
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94eb8e3cd7dcf5bee3b71e3368935e6eddd4b81660c7513a87e73364029a61b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190236002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3d66d8606f13c783bf540c4c486d6f66f3fe69e1745271a70ebfb930d186dc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190236004.
Maria Stuart i Skotland (arr. J. Halvorsen): Valse Caprice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c982a662f9986ec34b187ebb847a231cc7ab8cec5c68f80227dea2a10c5fd5. 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/HKI190236011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80292462630a4726c0ed7c207cdfc63e85002faeb55fcca1f9bc64d4fc02b61. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190236012.
Norwegian Dances, Op. 35: No. 2 in A Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1fd4deb960bcf9982a4119720785c0acda10355dff8105bbdc1c81e71cd11a. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190236015.
Student Violin Concertos: Conciertos para Violín y Piano
Küchler: Violin concertino Op. 11 in G Major: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99e0be499cddbae7ea1788736278a155a8c9355ad84490bd1c2b83ad8257651. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011930670.
Küchler: Violin concertino Op. 11 in G Major: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c171b710791beb57e85a98ecb81af6041f80c315e72125b029536a6a4ce2ff. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011930671.
Küchler: Violin concertino Op. 11 in G Major: III. Rondo: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cf99fc34af7e91fe306220d807762777863ca05279602bd7a758a113231475. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011930672.
Küchler: Violin concertino Op. 12 in D Major: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6222b4c0de550d2ce03bae7c40062aeba580c828223c2c0aed5aef952f2be1. 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/ESA011930673.
Küchler: Violin concertino Op. 12 in D Major: II. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2455a91b61d476252ef62abfb1d76c69e4fb014c2ae200feaf1fbafc60a1c9b4. 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/ESA011930674.
Küchler: Violin concertino Op. 12 in D Major: III. Rondo: Allegreto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd874c2daabfce00cd91953156965ae335871f183246918bc4f8d5e6bcc7cf4ff. 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/ESA011930675.
Küchler: Violin concertino Op. 15 in D Major: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bafe3a895ed599090f2777a72311b2d623f291d639488ff58a61db54f86735d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011930676.
Küchler: Violin concertino Op. 15 in D Major: II. Siciliano / III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe679b61554c9756a4758a3f1c95eb5ce747bdee6bffd1772c061e534ce0db2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ESA011930677.
Rieding: Violin concertino in Hungarian Style Op. 21 in A Minor: Andante sostenuto - Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4e7f4c322a8dfe2d50d355aa9c1d1ac1e24129f0e4d275405920de04c91e4a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011930678.
Seitz: Student concerto No. 5, Op. 22 in D Major: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71afab8c261e1e7f2a162b23cbc5472114d641ee187e82572c2db5d65886c1f4. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:47:50Z), 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/ESA011930679.
Rieding: Violin concertino Op. 24 in G Major: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8514c0a48bf3ec94c01a4bb166e7603c08c16391ecb69b0a5a1612b9d81aadaa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011930682.
Rieding: Violin concertino Op. 24 in G Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b59153eaa1823f74be21c1a0539919d4b6095e0a258295750d06467b79d8be. 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/ESA011930684.
Rieding: Violin concertino Op. 25 in D Major: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7a28d0f29956a1c25b20552f5c1b8fa9cfbd454087dfa8edcc6254b3358fba. 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/ESA011930686.
Rieding: Violin concertino Op. 25 in D Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b4cd2b0c36c0822ca6ef4d5bb7f0cd3763fe186e68f9082212c0dc3db8b2a9. 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/ESA011930687.
Rieding: Violin concerto Op. 35 in B Minor: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc125f35822c0e43286034ac3f1c5bfbcf3fe16d1be07843e70eb957400aa75eb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESA011930688.
Rieding: Violin concerto Op. 35 in B Minor: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2d0cc2206aff094bb9cef323c1f16a53bb42bb38b60ee234e1a01adeccf2e9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011930689.
Rieding: Violin concerto Op. 35 in B Minor: III. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ed458001f1978914f48e9a6d931a99a4a59e2141a14a3f9550d5a7752f8e88. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ESA011930690.
Sitt: Violin concertino Op. 70 in A Minor: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466b5f8b7f75270e1bb824355cc7764169630d5518314d7c029ade4027cff661. 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/ESA011930693.
Sitt: Violin concertino Op. 70 in A Minor: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd202a66c71e0782c1cab766f596cc1557de934210cb7861b713606ac7ae185. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA011930691.
Mozart: The Violin Concertos; Sinfonia Concertante
Violin Concerto No. 2 in D Major, K. 211: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54a6b31804f9fc01263e2aa27d4a5824d672edb5c0620e3da4ad8fb76b79711. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEN960500071.
Violin Concerto No. 4 in D Major, K. 218: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe433e0c7b9ad34e9d8ec2cf741a9feb14b762ac03d0a5e9df4bea7d7de3ea83f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN960500101.
Violin Concerto No. 2 in D Major, K. 211: III. Rondeau (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0758d0b5b2b42c2777a7a728e25f79e78c605b3e439af7c20a911b0ffb294b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN960500073.
Violin Concerto No. 4 in D Major, K. 218: III. Rondeau (Andante grazioso - Allegro ma non troppo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a209db7934495113f2bbf044fd41ccc4bed5a51785efbc4f6e3ffbd684980. 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/DEN960500103.
Violin Concerto No. 3 in G Major, K. 216: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd199564d3c37f5785881cccb6cdeca6f708d7c7ffa28ee77b655429c44943732. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN960500111.
Violin Concerto No. 1 in B-Flat Major, K. 207: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d383787effad946b8d9e0396127b6196f22712319a79fc6dc0eec54a0c9110. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN960500083.
Violin Concerto No. 3 in G Major, K. 216: III. Rondo (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4933de93051445da2404956f9c64f4202a0a4241aca6ccf2da343da15c17aac1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEN960500113.
Violin Concerto No. 5 in A Major, K. 219: I. Allegro aperto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa843a19f4c4d71e7c45a15a88fede16c5be497b62935fd976d3a609090c5e4ff. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960500091.
Violin Concerto No. 1 in B-Flat Major, K. 207: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fcd9b54489be22e597fba7bf4b6e04c7ef0e56e76f4ff84ca77ed8861cad9b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEN960500081.
Violin Concerto No. 1 in B-Flat Major, K. 207: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a7ceb3aecd08c1b2df1a18943b97ac5a8b0735295df2729563a2ba5154bde9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEN960500082.
Carl Maria von Weber Men's Choir, Berlin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ddf96b92e5c10650f93f8c485e0a51dafc78ac26fc358c28dba46dbabe125d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1010867.
Die Lorelei: Ich weiss nicht, was soll es bedeuten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240c96b12b823a0e2640cba493127984e77036b171deadbe973bd09119385c66. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1010868.
Schone Ahnung ist erglommen, Op. 57, No. 2, J. 228, "Fruhlingslied"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6944214ba1ea6096c85da440359c92cb95a60a0e247f7b70bced5c92899630cb. 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/USB8U1010873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8b2aff87ba24c0df6d224d32369302563f4c0509ec80521d8dd8be80ad5297. 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/USB8U1010877.
6 Songs, Op. 48: No. 4. Die Ehre Gottes aus der Natur, "Die Himmel ruhmen des Ewigen Ehre" (arr. C. Reinecke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca874b26090136337e62cdd397f110797e4c3b19b28801f761538f4f089fb04. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1010879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0af5cd739d44a470c9262e1587e0cf068c7271b7548cda341e7ddd3d79c7496. 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/USB8U1010887.
Heidenroslein (Rose on the Heath) (arr. H. Sitt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5605f7928c39c49ab858c39c621ed8529f370aca13deb47d4fdeb008ccd7256. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1010869.
Piano Concerto in A Minor, Op. 16: I. Allegro molto moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92fe7e2cee9aeafc90c8367e6f2526b7706a5fd9eea4c86a25074bb6f9f25ad. 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/HKI199247601.
2 Elegiac Melodies, Op. 34: No. 2. Varen (Last Spring)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae582c08627d8a2408ed7ef5381ce9ae1fe7e2aaf459042134a5ad2d43281b9. 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/HKI199247602.
Peer Gynt-Suite Nr. 1, Op. 46: I. Morning
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47038a467db0fb1cb2d114fbdbe3006979132eb140d10da08af0b85f782784e7. 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/HKI199247604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca13c3a1ff907a5336208b4b1acccea51d8701898111ff5374dc0a8413f6403. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199247606.
Fra Holbergs tid (From Holberg's Time), Op. 40 (version for orchestra): IV. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976b02e9e6a6ee043ce1b9142f795d69b7691445cad9f318fa10064f7f02a84d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199247610.
Norwegian Dances, Op. 35: No. 2 in A Major (arr. for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf322a8b06b2d3907bda5cd99996c01a619e3e3d78a65c1813511db7b299fef4b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HKI199247603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaead631e9ce487e371bb860119955f01f5c995999aa7d2a7160ff0ffeafb0c. 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/AUFFF1200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2040f77a52c84aa25fd4cec98c5b73dfcfc6f05dde65f99f0085cd75e4a3510a. 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/AUFFF1200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ad883692477ddf80af70a3b45049557633edc23ed4822ed0efb29f91529db3. 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/AUFFF1200082.
Three Compositions, Op. 19: No. 3, Lullaby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091fcb3f89b164532dc2600b48bb7b40382af2a9ffa0a189d23abab308a874f4. 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/AUFFF1200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7beee130eba950353f260fb20d18d80725502cbffa07c806d2f38852135e004. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUFFF1200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25f8b2b254304196b612fff07d41a207e147eff2bdb864ebd38785e0b0ff5db. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/AUFFF1200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097feb2705a1aef210c6d7dabec5fb8100c0f4245e37d451eccfc7c1dcd82622. 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/AUAB00350001.
Swan Lake, Op. 20, TH. 12, Act II: No. 10 Scène
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfca4c8713d65d1909baefaff3eb1af304bab3a791aa9ab085cd76ded144a2a. 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/AUAB00350004.
The Sleeping Beauty, Op. 66, TH. 13, Act I: 6. Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300c282facd3a0c209678e143b5addc30adf3cd56aa0bc431cc947a2d993585d. 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/AUAB00350015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25833bf6e57dbab8e0ec834667780c7465d889e781b150b87c93efe808e962a. 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/DELN21403001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cae28e905bf7d9aeedf3bc3ff4d456ed84e700f6f22d84ad00b04fb2f246876. 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/DELN21403012.
Romance in E-Flat Major, Op. 4 (Arr. Zimmermann for Viola & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09757fb64164f14a344072a482e477dc02cd50b5d96682eaf975b6bfa58e2631. 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/DELN21403013.
Albumblätter, Op. 39: II. Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abdff18a6f0e850a319a9645df24ff4f90afb22ef4f542c3c6733c890946812. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DELN21403002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c114ddac3dfc020d9c64bd9806b707d26ac8428b86575a35600b0188943f6e3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELN21403003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0a6e56e1e322f50581711b91d5bbde824d9612325c2a31807cf69efcff5b5d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DELN21403004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8a9e76db5024dc29b480d11837616c070ccac08a044703859a709fddfb7433. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DELN21403005.
Albumblätter, Op. 39: VI. Allegro, molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdb76a030b3f9a3b8ba6ab0d414750241d1fe828c2cdd9a614cc2761504b2fd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELN21403006.
3 Gymnopédies: 1. Lent et douloureux (Arr. for orchestra by Claude Debussy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2db358f6625eb2919212f6de3c05a5e2ab7e849a5178d67aaa02efe25124d5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/AUAB09250010.
Peer Gynt Suite No. 1, Op. 46: III. Anitras dans (Anitra's Dance)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ccb1062d8a40e15a95d16498a3025cd13b5b0fb79b023d9017ac6a66692f33. 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/HKI190744403.
Peer Gynt Suite No. 1, Op. 46: IV. I Dovregubbens hall (In the Hall of the Mountain King)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dd3d2b5129cdbd404ac5259674c3315482f36881468eba9e3984cbd7eb77f5. 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/HKI190744404.
Lyric Pieces, Book I, Op. 12: I. Arietta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dabf2a973f6441b499a85a4d30a4980d876c18dcc561fb60f10840102ee4ef. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/AUAB01550245.
Abdelazer, Z. 570: Rondeau - Arr. by Mary Cohen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71978222054e2f80aed9219b691404c0fe32b0607141491c0e2e362e11a48ceb. 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/AUFFF0600076.
Concerto in G Major, TWV 51:G8: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125e0a7a6c0ae47730168330ac7fed09d1614fc56744b7644d632b46f6867b6f. 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/AUFFF1200057.
Violin Concerto No. 2: II. Andante - Doppio movimento - Tempo I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437f0e13181f129c965c9e3f9581392ff76f1826b59a029b0279c1a89eecc0b3. 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/PLA161394502.
Grieg: Orchestral Music, Vol. 2 - Orchestrated Piano Pieces
Grieg, E.: From Holberg's Time / Sibelius, J.: Karelia Suite / Finlandia / Valse Triste / Suite Champetre
Brahms / Reinecke / Herzogenberg / Kiel / Fuchs / Sitt: Viola Works