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 0x56903bb26c0740c4033aaf0c09d5a146e82c40b1acf6ac88a65608b9d97e49be. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7680dfd2-0a84-4786-b0a9-3dc70405efb2.json and https://artists.proofprofile.net/proofs/artist/7680dfd2-0a84-4786-b0a9-3dc70405efb2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Missa Miserere mihi Domine: IV. Motet "Sitivit anima mea"
Missa Miserere mihi Domine: V. Sanctus (Benedictus)
Missa Miserere mihi Domine: VI. Motet "Non mortui qui sunt in inferno"
Missa Miserere mihi Domine: VII. Agnus Dei I & II
Missa Miserere mihi Domine: Motet "Sitivit anima mea"
Missa Miserere mihi Domine: Sanctus. Benedictus
Missa Miserere mihi Domine: Motet "Non mortui qui sunt in inferno"
Missa Miserere mihi Domine: Agnus Dei I & II
Missa Dominicarum Adventus et Quadragesimae
Cardoso: Requiem, Lamentations, Magnificat & Motets
Lamentations for Maundy Thursday: Lectio 2: Vau. Et egressus est a filia Sion
Lamentations for Maundy Thursday: Responsory 1: In monte Oliveti
Lamentations for Maundy Thursday: Responsory 2: Tristis est anima mea
Missa pro defunctis a 4 "Requiem": I. Introitus
Missa pro defunctis a 4 "Requiem": II. Kyrie
Missa pro defunctis a 4 "Requiem": III. Graduale
Missa pro defunctis a 4 "Requiem": IV. Offertorium
Missa pro defunctis a 4 "Requiem": V. Sanctus and Benedictus
Missa pro defunctis a 4 "Requiem": VI. Agnus Dei
Missa pro defunctis a 4 "Requiem": VII. Communio
Missa hic est discipulus ille: II. Gloria
Missa hic est discipulus ille: III. Credo
Missa hic est discipulus ille: IV. Sanctus
Missa hic est discipulus ille: V. Benedictus
Missa hic est discipulus ille: VI. Agnus Dei
Missa tradent enim vos: VII. Agnus Dei II
Pater Peccavi: Music of Lamentation from Renaissance Portugal
Choral Music (16Th Century Renaissance) - Victoria, T.L. / Pujol, J.P. (La Colombina)
Lobo, D. / Cardoso: Portuguese Requiem Masses
Paradisi Portas - Choral Music from 17th-Century Portugal
At the Gradual: Credo (Missa Paradisi portas)
At the Offertory: Sanctus (Missa Paradisi portas)
At the Elevation: Benedictus (Missa Paradisi portas)
At the Elevation: Agnus Dei (Missa Paradisi portas)
Vau. Et egressus est a filia Sion: I. Vau. Et egressus est
Amarae morti: Lamentations & Motets from Renaissance Europe