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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abc017178ad327d386ac4a18349413abd11dd30f122bbf0c130ac706a0cc71d. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68defea2-f31a-4812-ae7a-85f84426b7f5.json and https://artists.proofprofile.net/proofs/artist/68defea2-f31a-4812-ae7a-85f84426b7f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
20th Century Music from Krakow in St. Mary's Basilica
Symphony No. 2, Op. 45, "Przed krucyfiksem w kościele Mariackim": II. Adagio
3 Piesni pasyjne: No. 1. Pieta. Żale Matki Boskiej pod Krzyżem
3 Piesni pasyjne: No. 2. Tren. Lamentacja o umęczeniu Pana Naszego
3 Piesni pasyjne: No. 3. Hymn. Uwielbienie boga
Missa in honorem Sanctae Caeciliae: I. Kyrie
Missa in honorem Sanctae Caeciliae: II. Sanctus - Benedictus
Missa in honorem Sanctae Caeciliae: III. Agnus Dei
3 Psalmy, Seria II: No. 1. Confitebor tibi
3 Psalmy, Seria II: No. 3. Lauda Jerusalem
Symphony No. 2, Op. 45, "Przed krucyfiksem w koscieli Mariackim": Organ Symphony No. 2, Op. 45, No. 2, "Przed krucyfiksem w koscieli Mariackim": II. Adagio
3 Piesni pasyjne: No. 1. Pieta: Zale matki boskiej pod krzyzem
3 Piesni pasyjne: No. 2. Tren: Lamentacja o umeczeniu pana naszego
3 Piesni pasyjne: No. 3. Hymnn: Uwielbienie boga
Missa in honorem Sanctae Caeciliae: Kyrie
Missa in honorem Sanctae Caeciliae: Sanctus - Benedictus
Missa in honorem Sanctae Caeciliae: Agnus Dei
3 Psalmy (Seria II): No. 1. Confitebor tibi
3 Psalmy (Seria II): No. 3. Lauda Jerusalem
Te Deum, WAB 45: Te Deum laudamus - Te ergo quaesumus
Te Deum, WAB 45: Te Deum laudamus - Te ergo
Choral Music (Sacred) - Handel, G.F. / Mozart, W.A. / Haydn, F.J. / Beethoven, L. Van / Bach, J.S. / Mendelssohn, Felix / Bruckner, A.
Messe Solennelle de Sainte Cécile: V. Sanctus
Te Deum in C Major, WAB 45: I. Te Deum laudamus