The Cleveland Quartet was a string quartet founded in 1969 by violinist Donald Weilerstein, at the time an instructor at the Cleveland Institute of Music, whose director Victor Babin had secured fundi
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 0xc883c62c636b355d2320da17bcc2c515e1269580105e42758c412c0ae754d99a. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d50a3be2-180b-4688-9016-b421c10b1877.json and https://artists.proofprofile.net/proofs/artist/d50a3be2-180b-4688-9016-b421c10b1877.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brahms: Piano Quintet in F Minor, Op. 34
Piano Quintet in F Minor, Op. 34: I. Allegro 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 0xee947c8391f862ad80a4a98fe885a872d86db136dbd14ce5b967f8ffc2892241. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USSM11707604.
Piano Quintet in F Minor, Op. 34: III. Scherzo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbf0a11b678a3127098e98e61c4e5da902fdb1233663c7be009918b0269e0d2. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USSM11707606.
Ultimate Classical Masterpieces: Beethoven, Schubert, Mendelssohn
Christ on the Mount of Olives, Op. 85: Hallelujah
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdc7a67985ae8e295b23059f84cc68b5abfc38c6ef6aa4faf974ac258b160ca. 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/USTE10301119.
Beautiful Wedding: Classical Music for the Wedding Dinner
Dvorak: Symphony No. 9 in E Minor "From the New World", 4. Allegro Con Fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe492109ca7108629999074cb29ee9454882744ebcfa118eb3510bd960a572320. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USKO11701584.
Dvorak: Serenade for Strings, Op. 22 2. Minuet. Allegro con moto - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7191fb98474c3fb83da175611576592662329f11da49ab2dadd9989a4877c534. 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/USKO11701602.
a calm playlist for reading, studying or writing
Nocturne No. 1 in E-Flat Major. Molto moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9c85faf40a95321b47f17efa676a50d287ad69ea8b66b9ba0c3c0f6d3e514e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USTE10301199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c3bf5344303721d6e771c1cbb3fff6e122c9abaa92e8ad54dc4d6cdca35446. 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/USTE10436501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eca0d311a0b7df7a3cdcab62067f80f8d098af4a50b7867a0e120e19a06342. 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/USTE10301440.
2 Arabesques, L. 66: No. 1, Andante con moto (Transcr. Y. Kondonassis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290e99d1acf17ec5bbc98f2256671a0b78881ca9767fa41b7e3d1b349e0bfd00. 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/USTE10308361.
Symphony No. 17 in G Major, K. 129: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abd675aec584fd8d2ec410b25d5ca1d9392a9e2b910890197cdf3e89aaaf31b. 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/USTE10413242.
2 Piano Pieces, Op. 157: No. 2, La fileuse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbc620fa6190c888993f41d862950cb84fd54f32666c5756c37675aad04a3fc. 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/USTE10302313.
Nocturne No. 9 in E-Flat Major. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1d134c9ca5579f3bf610f2aad5ced50a65f5098a531d516ce6bd115db493ba. 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/USTE10307199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d6944a7468f031387800bb3b7ebe18a25c4f30a8316ea87b8196b3617e5048. 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/USTE10460406.
3 Mélodies, Op. 7: No. 1, Après un rêve (Arr. Y. Kondonassis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4db9253ff0788dda910b876576ce792b2c438be5a90ebebbf24057930464f6. 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/USTE10602590.
Nocturne No. 15 in C Major. Molto moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bfac04ac9737ef71b82fd7b1d0541be8bc503d6607283aaae76d986c6ce4a9. 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/USTE10313199.
Majestic Melodies: Tchaikovsky, Beethoven, Liszt
Beethoven: String Quartet No. 12 In E-Flat Major, Op. 127 & String Quartet No. 14 in C-Sharp Minor, Op. 131
Beethoven: String Quartet No. 15 in A Minor, Op. 132 & String Quartet No. 16 in F Major, Op. 135
Beethoven: String Quartet No. 13 in B-Flat Major, Op. 130 & Große Fuge in B-Flat Major, Op. 133
Beethoven: String Quartets, Op. 18 Nos. 4 & 5
Beethoven: String Quartets, Op. 18 Nos. 1-3
Brahms: String Quartets Nos. 1 in C Minor & 2 in A Minor
String Quartet No. 1 in C Minor, Op. 51 No. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4693a467f4b392b2762d90bae65032dc569a64ac4500b83f5c871df357f01fa7. 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/USTE10301346.
String Quartet No. 2 in A Minor, Op. 51 No. 2: I. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fe0623a8d65e9b580a7155db2f5eb2fe5dd1c256c70495176160cd26aeaecc. 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/USTE10305346.
Beethoven: String Quartet No. 10 in E-Flat Major, Op. 74 "Harp" & String Quartet No. 11 in F Minor, Op. 95 "Quartetto serioso"
Beethoven: String Quartets, Op. 59 Nos. 2 & 3 "Razumovskys"
Beethoven: String Quartet No. 6 in B-Flat Major, Op. 18 No. 6 & String Quartet No. 7 in F Major, Op. 59 No. 1 "Razumovsky"
Schumann: Piano Quintet and Piano Quartet
Mozart: String Quartets Nos. 14, K. 387 & 15, K. 421
String Quartet No. 15 in D Minor, K. 421: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe027b6655ca6b7534db5bfd6f407a6274b362e871ef6e0c587dabbc114437b14. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USTE10305297.
String Quartet No. 15 in D Minor, K. 421: III. Menuetto. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c930eba9056a6a916c10487c78959aad3e09f64c216e101362add26a8a3368. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USTE10307297.
Dvořák: Quartets Nos. 12 in F Major, Op. 96, B. 179 "American" & 14 in A-Flat Major, Op. 105, B. 193
String Quartet No. 14 in A-Flat Major, Op. 105, B. 193: I. Adagio, ma non troppo - Allegro appassionato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295d4e4cecc95e620909f344576eeb8cf9d31feaf1280d97f73e92b4a5282ba5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USTE10301283.
String Quartet No. 14 in A-Flat Major, Op. 105, B. 193: III. Lento e molto cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1270297ca90a3c3ca2556a5d07cc363fd03db6c7016b58ab8b5b6dd57d363c24. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USTE10303283.
String Quartet No. 12 in F Major, Op. 96, B. 179 "American": I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9eef3812a95a3da3c5cfb4046c6cae6e477f1f5d737eb5795867882d1a723d. 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/USTE10305283.
String Quartet No. 12 in F Major, Op. 96, B. 179 "American": II. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703b8b127c2d3ba9d702dacb31f9ef48b7255f3092bd68ff2973b9966daae905. 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/USTE10306283.
String Quartet No. 12 in F Major, Op. 96, B. 179 "American": III. Molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bed9cffb648321121c4aaf0719e0fee430f356f059bf062d3c885b4e15cdfa. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USTE10307283.
String Quartet No. 12 in F Major, Op. 96, B. 179 "American": IV. Finale. Vivace ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030371c9bb41dd71f38e71396d1dd63d69740fbb0664b0e45b52ef487ce3f8fe. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USTE10308283.
Schubert: Piano Quintet in A Major, Op. 114, D. 667 "Trout" & String Quartet No. 13 in A Minor, Op. 29, D. 804 "Rosamunde"
Borodin: String Quartet No. 2 in D Major - Smetana: String Quartet No. 1 in E Minor, JB 1:105 "From My Life"
Mendelssohn: String Quartet No. 2 in A Major & String Octet in E-Flat Major
Debussy: String Quartet in G Minor, Op. 10, L. 85 - Ravel: String Quartet in F Major, M. 35
String Quartet in G Minor, Op. 10, L. 85: II. Assez vif et bien rythmé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20cbbcbc1cd296dbe1362d7a0c84a06473d1080390972247ac93d19f134b690. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USTE10302111.
String Quartet in G Minor, Op. 10, L. 85: III. Andantino doucement expressif
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a59efa7c35a5421c1af9cd98ecfb763c7c3cb74e075e21697ccf2322e6e866. 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/USTE10303111.
String Quartet in F Major, M. 35: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff84ed6c14832655efcde926da22c41abc511a87a041a06a40e5179c5d41dcfe. 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/USTE10305111.
Schubert: Quintet in C Major (Remastered)
String Quintet in C Major, D. 956, Op. 163: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a500484c2d0ca53bcc593882d91cedc2f6829c4026ece4ea8e24a11dc85e0b. 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/USSM18300315.
String Quintet in C Major, D. 956, Op. 163: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06990afc29e9cd7421e270d316c593841686029b88f147f229a985a26a58e9f7. 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/USSM18300316.
String Quintet in C Major, D. 956, Op. 163: III. Scherzo. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a96e99dceceed9cd04430f524b3a9964a1c8a04c3d09b12eea209765f85e94d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USSM18300317.
String Quintet in C Major, D. 956, Op. 163: IV. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c8b68cc9b39a65ceda8ec521060fb761b6f5100cd13a02b20283ed071afc9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USSM18300318.
Beethoven: The Late String Quartets (2023 Remastered Version)
Brahms: The String Sextets, Op. 18 & Op. 36 (2023 Remastered Version)
String Sextet No. 1 in B-Flat Major, Op. 18: I. Allegro ma non troppo - 2023 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9489873197e733366b5a6dc985dcbf24e080a6b2ee9f1dcbec7434e744227ea4. 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/USSM12200913.
Beethoven: The Six Early Quartets (2023 Remastered Version)
Beethoven: The Five Middle Quartets (2023 Remastered Version)
Piano Quintet in A, D.667 - "The Trout": 1. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8261af162bfe9835c9c2e002f649b5b1bb657e8fed7e9c32828b9bed21b2f12. 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/NLA507706301.
Piano Quintet in A, D.667 - "The Trout": 2. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943ca0cd85d167aa3f62108f9c668560c2dbbdd4964fe977f41a42c633a95491. 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/NLA507706302.
Piano Quintet in A, D.667 - "The Trout": 3. Scherzo (Presto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc536cb4e27422e6b7a7b351a2e5985b83d5d558cca526552c91e8819a8a247. 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/NLA507706303.
Piano Quintet in A, D.667 - "The Trout": 4. Thema - Andantino - Variazioni I-V - Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09441b438f80526d0c35621cf545b29cde5fd6ff7bde9b00d36d096224459ce4. 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/NLA507706304.
Piano Quintet in A, D.667 - "The Trout": 5. Finale (Allegro giusto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf537e9c2f56fbdad7dd93cf79c440901e9cf34ef141f6be04b85c56c5dd8d73. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/NLA507706305.
Mendelssohn: Octet, Op. 2 & 4 Pieces for String Quartet, Op. 81 (2023 Remastered Version)
Dvorák: Quintet No. 2 in A Major, Op. 81
Piano Quintet in A Major, Op. 81: I. Allegro ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c17b74b09c3ae91346d7f442a13a38262a52af35ba749b9ead02a41cbe805f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11707562.
Piano Quintet in A Major, Op. 81: II. Dumka: Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e42cb45b3e8e1b6f79c2a6dceaa2c06cf3420b628d3f3ae0df98de4d01856e. 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/USSM11707563.
Piano Quintet in A Major, Op. 81: III. Scherzo - Furiant: Molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfea77cc202a4a2939cbd0e67586ccf3f1773978f8546ba619fa307c2d9780e9. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USSM11707564.
Barber: String Quartet, Op. 11 - Ives: String Quartet No. 2 & Scherzo (2023 Remastered Version)
String Quartet in B Minor, Op. 11: I. Molto allegro e appassionato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee99467a0a7d3fec62f514fff1659a5148903edc892891aa0938938b9252839c. 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/USSM12200841.
String Quartet in B Minor, Op. 11: II. Molto adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028830d92cc4050ee268696e70fd3d307424509d70dd74bfc3fb0a3acf5fc001. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USSM12200842.
Haydn: String Quartet in D Major "The Lark" & String Quartet in D Minor "Fifths"
Schubert: Octet for Strings and Winds in F Major, D. 803 (2023 Remastered Version)
Schubert: String Quartet No. 14, D. 810 - Mozart: Adagio and Fugue in C Minor, K. 546 (2023 Remastered Version)
Brahms: The Complete String Quartets (2023 Remastered Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666b56ca977c913ea7bc78a0a0261a36a2cfcacfd89489e351a190d0d2189d57. 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/USTE10307600.
Brahms: Quintet in B Minor for Clarinet and Strings, Op. 115