Wolfgang Meyer (13 August 1954 – 17 March 2019) was a German clarinetist and professor of clarinet at the Musikhochschule Karlsruhe. He worked internationally as a soloist, in chamber music ensembles,
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 0x17e5c66b1a3cb59be8289e87df14d1978f7e0d7d85f200b88fa6fc0f54b35479. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/340e4e5a-af11-4e74-a1df-8d20f2cd7a88.json and https://artists.proofprofile.net/proofs/artist/340e4e5a-af11-4e74-a1df-8d20f2cd7a88.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Respighi: The Fountains of Rome; The Pines of Rome; Ancient Airs and Dances - Suite III / Boccherini: Quintettino / Albinoni: Adagio in G Minor
Fountains of Rome, P. 106: I. The Valle Giulia Fountain at Dawn
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 0xf1ccba7ce8f23f0ad32e1879d4df0429306254e78bbff8cc20dba1925b9b03e4. 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/DEF057800411.
Fountains of Rome, P. 106: II. The Triton Fountain in the Morning
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47e108f2e850f7bca59e9bba5517e4ec8f57bd095bb63716a3281cf78e82a00. 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/DEF057800412.
Fountains of Rome, P. 106: III. The Trevi Fountain at Midday
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511879379e21b884ddde0327b1eff4dde1d14272d2e914acc3ed39be86e4916b. 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/DEF057800413.
Fountains of Rome, P. 106: IV. The Villa Medici Fountain at Sunset
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b54d49b444becb7947f927c597cd3a610256ad65ffd9f778a461166d3bae823. 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/DEF057800414.
Pines of Rome, P. 141: I. I pini di Villa Borghese
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Pines of Rome, P. 141: II. Pini presso una catacomba
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Pines of Rome, P. 141: III. I pini del Gianicolo
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Pines of Rome, P. 141: IV. I pini della Via Appia
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Ancient Airs & Dances, Suite III, P. 172: I. Italiana (Anonymous)
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Ancient Airs & Dances, Suite III, P. 172: II. Arie di corte (Besard)
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Ancient Airs & Dances, Suite III, P. 172: III. Siciliana (Anonymous)
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Ancient Airs & Dances, Suite III, P. 172: IV. Passacaglia (Roncalli)
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String Quintet in C Major, G. 324 "La musica notturna delle strade di Madrid": I. Introduzione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7082cbabe7e189e3c4dd84def5b46f6c4e09b8f7b6b4b80f05cfe371628fe45a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEF056900881.
String Quintet in C Major, G. 324 "La musica notturna delle strade di Madrid": II. Minuetto. Allegretto "Tanz der Blinden"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bdad1d0fede17fd2b183427145314680dcbb749cf971fe006760782148cf5f. 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/DEF056900882.
String Quintet in C Major, G. 324 "La musica notturna delle strade di Madrid": III. Largo assai, senza rigor di Battuta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4472cff8ee55e7a36178de5c0f0672e1c3fc5d5f284dd9e9f65944bd48d96b. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056900883.
String Quintet in C Major, G. 324 "La musica notturna delle strade di Madrid": IV. Passacalle. Allegro vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4257c51c6a11d7c9b8fcdc6480e4d89496675a595fc93490bbd35dc7824be96. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEF056900884.
String Quintet in C Major, G. 324 "La musica notturna delle strade di Madrid": V. Ritirata. Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a3b81cfabdac79b30a076445e77fea6bf44949589873bfc2e45bd8c3952a75. 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/DEF056900885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a31fdd77e926d08869f2f1b7d2a24b4d31cb04f31d499981b16e4c01225950c. 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/DEF056900860.
Adolf Busch: Chamber Music for Clarinet and Strings
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519cf53f1fddec10fc20519676b69da05d696f6b1e2702bec6de7fe209851591. 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/DEF056500962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17381ba608cccfc43f4b4bfcadd620a7f3f64fec37aacd5b52bfb16b808b4cce. 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/DEF056500963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91caaa08d93cb65c3f8d7f43b7430733829b07334d27823b2368407ea303b100. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056500964.
Te Deum, WAB. 45: V. In te, Domine, speravi
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72de085a6bbc7e3315ddc06432260af9f3e3e572c372f9b041e2c8795327755a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEF056601510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e14c798242a4c903a9fd803d0e17caf1cf59ce95c16f14473b474ebdfbf334c. 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/DEF056601520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12600d8caf47efc99db0be030eb1b5932925bd1d3fa2ebe6e9d71805591ee281. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEF056601530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8c7451cf0b1f02d99aecdf0aa91cc790260269afdab113dc2b6bb1235fb0a4. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEF056601540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb078b6a8e0fffe251718da0f3367aa6aaaa8397da70df05927df97615c9b3d90. 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/DEF056601550.
Afferentur regi virgines (Motet), WAB. 1
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973f9efab8acffd7230c699d44ad76f81be4dc7d034ed10c807ccae05ee9b7fd. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEF056602220.
Os justi meditabitur sapientiam (Motet), WAB. 30
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4764fa5835433232ebb10d0c8a5f2adaaa071c52835973d63407201b0c4d37c. 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/DEF056601570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d59720e95de6aba460da881f9e003e35368942b90308b5c1c4835f9e1398977. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056601580.
Psalm 150, for Soprano, Chorus and Orchestra, WAB. 38
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Meyer / Nemtsov: Jewish Songs Without Words
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Schubert: Deutsche Messe, D. 872: No. 5, Zum Sanctus
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Mendelssohn: Concert Piece No. 1 in F Major, Op. 113, MWV Q23: II. Andante
Deutsche Klarinette. Brahms, Mendelssohn, Beethoven, Weber...
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Mendelssohn: Concert Piece No. 1 in F Major, Op. 113, MWV Q23: III. Presto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3983a0ac37207ac8aa36a0a862b96c9f665bd43122bdfef319032e79cb87cee3. 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/DEF056701250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932e0a523d74b6544cc35b8a05e4ca85a368601420fdfb01ead3444ee4e77464. 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/DEF056131201.
Water Music Suite, HWV 348-350: Alla Hornpipe
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Mass In D, Op. 123 "Missa Solemnis" / 2. Gloria - Allegro vivace: Quoniam tu solus Sanctus
12 Contredanses, Stage Music & Other Works
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Mass In D, Op. 123 "Missa Solemnis" / 2. Gloria - Allegro vivace: "Amen, Amen, in gloria Dei Patris" / "Quoniam tu solus..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f20728e6e36f4fa1b6efc92dd51295acd74eaa4b427d4a91dc8e929b897f67. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e26d5401f43a75b5d01778c1f90194f08c65c3719e7c368f87ab688a08d6982. 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/DEF056131204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc8398078727f5f93863ba33170be94323159010b3033d1b2e8625f9cdd6200. 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/DEF056131205.