The Munich Chamber Orchestra (, or MKO) is a German chamber orchestra based in Munich. Its primary concert venue is the Prinzregententheater, Munich. The MKO also gives concerts in Munich at such venu
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 0x9506a1a3cb89b93037ff3fda30d622c87d660496da015e1a0e2063bcf34b794d. 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/a8e9da0a-89c6-4fc3-8015-9791a9589fcd.json and https://artists.proofprofile.net/proofs/artist/a8e9da0a-89c6-4fc3-8015-9791a9589fcd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Il carnevale di Venezia (Arr. H. Stadlmair)
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 0x8f6fdce3e30ce13586e8f444726a89694884146145384f6c22a1d02b294d9c80. 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/CH0041800011.
Variations for Clarinet & Orchestra in C Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f75cd974e876b1e89fb5a39a6f37be072750ab44141604e4e787992cf81fa19. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH0041800018.
Stamitz: Clarinet Concertos & Double Concertos
Lefevre, J.X.: Clarinet Concertos Nos. 3, 4 and 6
Stamitz, Hoffmeister & Pokorný: Clarinet Concertos
"And Then I Was in Time Again", Viola Concerto: I. Allegro, quasi recitando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afe0efb08fb6bba15264b9f1efed5a1c1b90fc59a79c7a0a96292a8de230020. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330185001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40ba20f0375a22dd7d95d4c396ae9fd31ecaed2236a41923f167c166ea13c9a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330285101.
The Living Mountain: II. At First, Mad to Recover the Tang of Height
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f97e7400dc5d1af6163feaa848a0475b1eebf79417e71837498f882d19f1dc. 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/DEB332172302.
The Living Mountain: III. As I Reach the Highest Part of My Dark Moor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36961924235bec8fb10fc4a0ff2b150279a24f4e35902d5a751635a9456f5976. 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/DEB332172303.
The Living Mountain: V. Once on a Night of Such Clear Silence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0c491e8d664193442cbc1aa06f8572293915a1593eb7b5ad25d371cd5df255. 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/DEB332172305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7da8ebfa82e81f0c12cc37d702e023c1c96e9a5f05b60c353fa31dfb55f9cd1. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEB332172307.
Larcher: Ouroboros: II. Allegro infuriato
Larcher: The Living Mountain: IV. In September dawns I hardly breathe
Prokofieff: Peter und der Wolf / Saint-Saëns: Der Karneval der Tiere
La magie de l'Avent - Musique féérique pour Noël
Vesperae solennes de Confessore, KV 339: Laudate Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a5a366eed04fed92fc2e61b9cff7ae2d108fd49fab914a08b20f8b700b5326. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH0041402700.
Dans une étable obscure: (Es ist ein Ros entsprungen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fb1ecd3a37ee23fa0d0876c124f71537640844abca2353a1ce4d012ae94eb3. 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/CH0041901512.
Mozart, L.: Divertimento, "The Musical Sleigh-Ride" / Toy Symphony / Jagd Symphonie / Symphony in D Major
100 Most Relaxing Classical Music In The Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1d632f8b04d96bce4c2108a0adc6f3372417483a1286c8579c5d42c43927bf. 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/USSJ10813859.
Oboe Concerto in D Minor, S. Z799: I. Andante e spiccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3edd38b3ac345dcab01c48e23067ea5a214b9cf14d503099b9c84860d33d9f3. 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/DEE861100754.
Cello Concerto in A Minor, Wq. 170, H. 432: I. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ce3956b8349428d7749673cf001a060f656a4ea6d48961354fadfdc003b596. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH1491329401.
Cello Concerto in A Minor, Wq. 170, H. 432: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe991a9bb0cc805b2e17f834f264debda756fd60710dcd34feda94e228340b0f7. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/CH1491329402.
Cello Concerto in A Major, Wq. 172, H. 439: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927ff1bba090934849f19cce4670f6e8b6bc0fb2fc0a8bbccce00f05b96de4fc. 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/CH1491329409.
Wolfgang Amadeus Mozart: Schatten ung licht: Chapter 1: Wunder der Natur (1756-1765)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd0664db01e71764b7d7d355a6d08d929fb6af5f26911c4e56761ab1acacd20. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71490601.