1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x35be8d10138db1dfdfd2982d18ee4aaf1fafc2bdfe462a26814a6aaa97a95340. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d74b0ca8-a4f8-4656-81ca-6e660a85062d.json and https://artists.proofprofile.net/proofs/artist/d74b0ca8-a4f8-4656-81ca-6e660a85062d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schumann: Missa Sacra - Brahms: Missa Canonica
Missa Sacra for Choir, Soloists and Organ in C Minor, Op. 147: I. Kyrie
Missa Sacra for Choir, Soloists and Organ in C Minor, Op. 147: II. Gloria
Missa Sacra for Choir, Soloists and Organ in C Minor, Op. 147: III. Credo
Missa Sacra for Choir, Soloists and Organ in C Minor, Op. 147: IV. Offertorium "Tota pulchra es, Maria"
Missa Sacra for Choir, Soloists and Organ in C Minor, Op. 147: V. Sactus
Missa Sacra for Choir, Soloists and Organ in C Minor, Op. 147: VI. Agnus Die
Missa Canonica in C Major for Mixed Chorus a cappella, WoO 18: I. Sanctus
Missa Canonica in C Major for Mixed Chorus a cappella, WoO 18: II. Agnus Dei
Mozart: Missa in C Minor, K. 427 "Grosse Messe": III. Et incarnatus est
Barbara Schlick/Monika Frimmer/Christoph Prégardien/Klaus Mertens/Kölner Kammerchor/Peter Neumann/Collegium Cartusianum Köln
{"copyright_id":"0x99341f8e4bf781bf4a41546c7c9b861a21a6bca3eed5e016fc7e256be582fc88","isrc":"DEC628900599","name":"Mozart: Missa in C Minor, K. 427 \"Grosse Messe\": III. Et incarnatus est","registered_at":"2026-06-04T15:43:36Z","spotify_id":"0kWzMn4EaauAQOfNa6PAMy","type":"track"}
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99341f8e4bf781bf4a41546c7c9b861a21a6bca3eed5e016fc7e256be582fc88. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0kWzMn4EaauAQOfNa6PAMy.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0kWzMn4EaauAQOfNa6PAMy.
Mozart: Mass No. 15 in C Major, K. 317 "Coronation Mass": II. Gloria
{"copyright_id":"0x0694bf19b87c330e9c177ec902ca92d656bc8002773c4c599c03f7d2378766e5","isrc":"DEC628800459","name":"Mozart: Mass No. 15 in C Major, K. 317 \"Coronation Mass\": II. Gloria","registered_at":"2026-06-06T22:52:42Z","spotify_id":"5wbPaxlx8bFIqaIQE0iLA2","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0694bf19b87c330e9c177ec902ca92d656bc8002773c4c599c03f7d2378766e5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5wbPaxlx8bFIqaIQE0iLA2.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5wbPaxlx8bFIqaIQE0iLA2.
Kölner Kammerchor/Collegium Cartusianum/Peter Neumann
Sanctus: Himmlische Klassik / Heavenly Classics
Missa brevis in G Major, K. 140 "Pastoral-Messe": I. Kyrie
Missa brevis in G Major, K. 140 "Pastoral-Messe": II. Gloria
Requiem in D Minor, K. 626: I. Introitus, Requiem aeternam
Mass in C Minor, K. 427: XI. Et incarnatus est
Mass in C Major, K. 317 "Krönungsmesse": III. Credo
Missa brevis in G Major, K. 49/47d: IV. Sanctus
Missa solemnis in C Major, K. 337: V. Benedictus
Missa solemnis in C Major, K. 337: III. Credo
Missa brevis in D Minor, K. 65/61a: IV. Sanctus
Missa solemnis in C Major, K. 337: IV. Sanctus
Mass in C Major, K. 317 "Krönungsmesse": I. Kyrie
Mass in C Major, K. 317 "Krönungsmesse": V. Benedictus
Missa solemnis in C Major, K. 337: II. Gloria
Mass in C Major, K. 317 "Krönungsmesse": II. GLoria
Missa brevis in D Minor, K. 65/61a: VI. Agnus Dei