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 0xee25d0bf8bac51e215739d394eac47d42b819ec3adb9674bec738eef745ba159. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55567487-f08a-4e1f-99fc-c92d68f3ffea.json and https://artists.proofprofile.net/proofs/artist/55567487-f08a-4e1f-99fc-c92d68f3ffea.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Mozart: Complete Divertimenti for Wind Ensemble
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 0xb4374bbf9d509d6267d5a0083fdbf31fc0002a8ffcc6b302dbc50643d4bfcfc1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331410580 — a six-check JSON result.
Divertimento No. 1, K. 439b: II. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5a22279e020c92d551c7cb6bbc7740550f7aca9a8dbb9065ed2e66ec6daf07. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLY331410581 — a six-check JSON result.
Strauss & Schumann: Works for Horn & Orchestra
Divertimento No. 4, Kv 439b (Kv Anhang 229): Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea4826742ec7dcfab55123c20ce90c12fdeb68345a17d3f5fc9e4a8afa1185c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLN580512866 — a six-check JSON result.
Divertimento No. 4, Kv 439b (Kv Anhang 229): Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752b04541924ec13dd3e037f3aaf5832745843d702f64186533d5ba359262497. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580512868 — a six-check JSON result.
Divertimento No. 4, Kv 439b (Kv Anhang 229): Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc829991d4510913bfd22d9cf3283cd561a9700e3182a65c82d1a299cd9d1c4. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580512870 — a six-check JSON result.
Divertimento In B Flat Major Kv 186: Allegro Assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8c78f80f68c717bb5313c4731dbbe03a6ba4a09f2def6c41318ccf6dc0fd31. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580512895 — a six-check JSON result.
Divertimento No. 5, Kv 439b (Kv Anhang 229): Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767f7abe2db36a3da5e790bd4945e56f1565e6ebd96a1059a261f5bf9a561e05. 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/NLN580512872 — a six-check JSON result.
Divertimento In B Flat Major Kv 186: Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cdd6d1d6172cb1cda1d947806b971cb721c07777c9708023799b590ec3a384. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/NLN580512896 — a six-check JSON result.
Divertimento No. 5, Kv 439b (Kv Anhang 229): Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02075c69a6d04cb5680737d1a798c32182b2a7403cc169e670788eeb8231fb1c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NLN580512874 — a six-check JSON result.
Divertimento No. 5, Kv 439b (Kv Anhang 229): Polonaise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe3768c3aaa88123fbe90b5fbe3287817b3826dc3ac75d141a3c11565d08235. 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/NLN580512875 — a six-check JSON result.
Divertimento No. 6, Kv 439b (Kv Anhang 229): La Ci Darem La Mano (From Don Giovanni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b92ec3cd08c5826ad5e7d84f060b282d57815dd506e53d14208a2979152d2a2. 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/NLN580512879 — a six-check JSON result.
Symphony No. 35 in D Major, K. 385 "Haffner": I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747efd973d85dc57651d9f4ebcfaf2a7d1e0643f955e23756555e2d84a85a211. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331410242 — a six-check JSON result.
Symphony No. 36 in C Major, K. 425 "Linz": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a716cf5b63fc2acc60528a4c08d635c721ef7ac49d4f7c2f26d1af089b1ab6b. 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/NLY331410249 — a six-check JSON result.
Symphony No. 38 in D Major, K. 504 "Prague": III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebb3519f24f77dfe9e41371c24cc675c7283684124bca35585b05133c395819. 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/NLY331410258 — a six-check JSON result.
Symphony No. 39 in E-Flat Major, K. 543: III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d36c466236a6c9535d5320b064dad675a6fb3fdbf1a26ef6dd66450ee08737. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331410261 — a six-check JSON result.
Symphony No. 40 in G Minor, K. 550: I. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bedb8654dc237ca9ad44994003b8bddf610c014fbf9f18ecc95bab131aaac4. 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/NLY331410263 — a six-check JSON result.
Symphony No. 41 in C Major, K. 551 "Jupiter": IV. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5548b351f7b3a32b78cff83fade703c78ab7d2108f64cecee1bc35daf8fc57. 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/NLY331410270 — a six-check JSON result.
Piano Concerto No. 24 in C Minor, K. 491: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e5048800fe6aab45f2075d40eb6df635e42691275a5edcf287b5010cfc36e4. 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/NLY331410286 — a six-check JSON result.
Piano Concerto No. 21 in C Major, K. 467 "Elvira Madigan": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d581522dce57d31f7ef102359f8aeb07dcab299654eb412429579d500066e0. 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/NLY331410304 — a six-check JSON result.
Piano Concerto No. 25 in C Major, K. 503: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0851049cd283f98376247571edfa3beedaa47e497a7fb957ee37b2ec83edb0f1. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/NLY331410311 — a six-check JSON result.
Piano Concerto No. 9 in E-Flat Major, K. 271 "Jeunehomme": III. Rondeau. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9187ac61609c5d629580912f3e5badfbf974c6c67414f22d63532d61fe452f3a. 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/NLY331410314 — a six-check JSON result.
Piano Concerto No. 17 in G Major, K. 453: III. Allegretto - Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde187b9a5cf4c081e83e1fb31b403553c707526636259ce2842ffa2a3e4f1db7. 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/NLY331410323 — a six-check JSON result.
Piano Concerto No. 20 in D Minor, K. 466: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5322655d5073e2dc850a3a41237df4034fe07092c98dea9dc4c726106ae324. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331410339 — a six-check JSON result.
Piano Concerto No. 14 in E-Flat Major, K. 449: III. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c4839e9528ea72c4b29783aed8c371df71df194bb8523dd1135b631892dfcf. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLY331410353 — a six-check JSON result.
Clarinet Concerto in A Major, K. 622: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277e392a3f7ffeb7c2ff377252aa8d2bc320cf5bbe938d3971c3c0915c3fad12. 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/NLY331410369 — a six-check JSON result.
Concerto in C Major for Flute and Harp, K. 299: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02e35c90253837b9707e4609f1dfaef607fa9ed416f8d4384b4debaf0c884bd. 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/NLY331410371 — a six-check JSON result.
Andante for Flute and Orchestra in C Major, K. 315
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485ec56d46116d9bd0f140c06412d4b6432d72b09a44a2cee2ff05d67010cdf6. 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/NLY331410380 — a six-check JSON result.
Oboe Concerto in C Major, K. 314: III. Rondo. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a674a2c8458469f8f1b36a69da88336c7f13dbb500a77f9da9c77a6436d6e43. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331410383 — a six-check JSON result.
Horn Concerto No. 2 in E-Flat Major, K. 417: III. Rondo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71a2cbd297c570a6bd995633884f9af01c26fcab705d23c7abe31be23b02352. 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/NLY331410392 — a six-check JSON result.
Sinfonia Concertante in E-Flat Major, K. 297b: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa056f04104fee0e786e8943a480d8192950a326c9b32835742dc682343033a78. 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/NLY331410388 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaede7e85ac11efc4c8bcb92e50142a11b65a3c2b5030002762b7e1c4b7754a37. 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/NLY331602499 — a six-check JSON result.
Violin Concerto No. 5 in A Major, K. 219: I. Allegro aperto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3862bd739aa36c216bb70a0e76276314571433647b4a78552fc149fdf2099e. 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/NLY331602506 — a six-check JSON result.
Divertimento in D Major, K. 136: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf621e5edeb81ef246b7349918dab5cb04a5d9d0e1e90a86396579b95e320817a. 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/NLY331410429 — a six-check JSON result.
Serenade in E-Flat Major, K. 375: V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdb838240cd462cddb03f9aeb749b6105114e4dcbe8c42e71947d82fb9b22dd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331410614 — a six-check JSON result.
Clarinet Quintet in A Major, K. 581: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7e5c880dcd56cd45fc71e8c9db917e60d9266d6ed401afa2478690dad75250. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331410889 — a six-check JSON result.
Flute Quartet in D Major, K. 285: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423656e4c6eb60d53be8457b00c50eb8e91a06c225c06944f9ae11de37486bbc. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLY331410922 — a six-check JSON result.
String Quartet in B-Flat Major, K. 458 "The Hunt": I. Allegro vivace assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366d372c66136e3225f65e75ca3d29c1cb19a0967056ac3660192dd3c5ea1978. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLY331411173 — a six-check JSON result.
Piano Sonata No. 11 in A Major, K. 331: III. Alla turca. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4662d290308ff318b2f71a0dafe5e54618d08ede99a4fdc1fb437d115ad2e616. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NLY331411237 — a six-check JSON result.
Piano Sonata No. 16 in C Major, K. 545: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3305176848d0cd290565ddca1b0b19a7cd2cd836d29f2635c109868ca339a283. 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/NLY331411250 — a six-check JSON result.
Requiem in D Minor, K. 626: III. Dies irae
Südwestdeutsches Kammerorchester Pforzheim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e8dfcabecdc208638bc691deb66e907eef120bcf20335d61064c57c2d5a2cc. 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/NLY331411354 — a six-check JSON result.
Requiem in D Minor, K. 626: VIII. Lacrimosa
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Die Zauberflöte, K. 620, Pt. 1: I. Ouvertüre
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Serenade in G Major, K. 525 "Eine, kleine nachtmusik": I. Allegro
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Serenade in G Major, K. 525 "Eine, kleine nachtmusik": IV. Rondo. Allegro
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Symphony No. 40 in G Minor, K. 550: IV. Allegro assai
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Quartet No. 1 In F Major: Allegro Moderato
The Rotterdam Philharmonic Wind Soloists
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Revisons nos classiques avec Patrick Barbier : 1 h avec Wolfgang Amadeus Mozart