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 0x8adc52f09d2a0f08a70ba59a0d91127b3e6c78215b65cbc3325f7ce9baccaba9. 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/671c81ac-3207-4510-90c9-db1d2d76d355.json and https://artists.proofprofile.net/proofs/artist/671c81ac-3207-4510-90c9-db1d2d76d355.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Choral Concert: Saint Clement's Choir - Rheinberger, J.G. / Brahms, J. (The Romantic Mass)
Mass in E flat major, Op. 109: Benedictus
Mass in E flat major, Op. 109: Agnus Dei
3 Sacred Songs, Op. 69: No. 1. Morgenlied: Die Sterne sind erblichen
3 Sacred Songs, Op. 69: No. 2. Hymn: Dein sind die Himmel
3 Sacred Songs, Op. 69: No. 3. Abendlied: Bleib bei uns
Missa canonica, Woo 18 posth.: Benedictus
Missa canonica, Woo 18 posth.: Agnus Dei
3 Motets, Op. 110: No. 1. Ich aber bin elend
3 Motets, Op. 110: No. 2. Ach, arme Welt
3 Motets, Op. 110: No. 3. Wenn wir in hochsten Noten sein
Choral Concert: Saint Clement's Choir - Howells, H. / Bax, A. / Horsley, W. / Harris, W.H. / Stanford, C.V. / Ferguson, W. (Hymns of Heaven and Earth)
There is a green hill far away (arr. B.M. Rose)
O what their joy and their glory must be
6 Hymns, Op. 113: No. 2. Purest and Highest
Jesu, grant me this, I pray (arr. E.C. Bairstow)
Sancta civitas (O holy city seen of John)