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 0x01ddc84144ba21c09f5ce57dbb1a6d4a90a0b1b83301c231e6a6322c1f47f79f. 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/9607f4b7-026f-4ae2-936e-301d9923da30.json and https://artists.proofprofile.net/proofs/artist/9607f4b7-026f-4ae2-936e-301d9923da30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Isaac: Missa super "O praeclara", Motets & Songs
Isaac: Missa super "O praeclara": Gloria
Isaac: Missa super "O praeclara": Sanctus
Isaac: Missa super "O praeclara": Agnus Dei
The Quintessence of Chant (Gregorianische Gesänge I & II)
Alleluia, Spiritus Domini - Psalm 95 (94)
Natus est Altissimi hodie filius - Puer natus est nobis
Angelus Domini nuntiavit Mariae - Ave Maria
Agmina celsa sunt - Gaudeamus omnes in Domino
Gregorianik - Die schönsten gregorianischen Choräle
Antienne: Nigra Sum Sed Formosa - Psaume 121: Laetatus Sum in His
Antienne: Cum Audisset Salutationem Mariae
Antienne Mariale et Trope: Salve Regina Misericordae
Ut queant laxis (Hymn to St. John the Baptist)
NPR Milestones of the Millennium: CHANT - Hymns and Sequences - Gloria in excelsis Deo