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 0xdf3db48036e31e13eaa3f72862f6219516e8e071b741783c414c8fef0fffad19. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cad4326-15a1-40a7-94fb-c77c8fcccdaf.json and https://artists.proofprofile.net/proofs/artist/3cad4326-15a1-40a7-94fb-c77c8fcccdaf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Behold, How Good and Joyful a Thing It Is
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The Complete New English Hymnal, Vol. 22
German Mass, D.872: Sanctus: Heilig, heilig heilig
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Service in C Major, Op. 115: Evening Canticle 1. Magnificat
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Service in C Major, Op. 115: Evening Canticle 2. Nunc dimittis
Magnificat & Nunc dimittis in D Minor: I. Magnificat
Magnificat & Nunc dimittis in D Minor: II. Nunc dimittis
Evening Canticles in E Major: I. Magnificat
Evening Canticles in E Major: II. Nunc dimittis
Evening Service in B Minor: I. Magnificat
Evening Service in B Minor: II. Nunc dimittis
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Magnificat & Nunc dimittis in F "Collegium Regale": II. Nunc dimittis