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 0x26f5d74fce439c70bb76df785caa983f452bddd4d74aba08ed42012049c6afd7. 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/72c90d4c-961b-45b3-aaf1-5316142489a5.json and https://artists.proofprofile.net/proofs/artist/72c90d4c-961b-45b3-aaf1-5316142489a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
J.S. Bach: Violin Concertos BWV 1041 & BWV 142; Double Concerto BWV 1043 (Christian Ferras Edition, Vol. 15)
Violin Concerto No. 1 in A Minor, BWV 1041: I. (Allegro moderato)
Violin Concerto No. 1 in A Minor, BWV 1041: II. Andante
Violin Concerto No. 1 in A Minor, BWV 1041: III. Allegro assai
Violin Concerto No. 2 in E Major, BWV 1042: I. Allegro
Violin Concerto No. 2 in E Major, BWV 1042: II. Adagio
Violin Concerto No. 2 in E Major, BWV 1042: III. Allegro assai
Concerto for 2 Violins in D Minor, BWV 1043: I. Vivace
Concerto for 2 Violins in D Minor, BWV 1043: II. Largo ma non tanto
Concerto for 2 Violins in D Minor, BWV 1043: III. Allegro
Herbert von Karajan - The Music, The Legend
Hungarian Rhapsody No. 5 in E Minor, S. 359/5 "Heroïde-Elégiaque" (Orch. Doppler/Liszt from S. 244/5) - Recorded 1961
Symphony No. 4 in E Minor, Op. 98: I. Allegro non troppo - Recorded 1963
Symphony No. 4 in E Minor, Op. 98: II. Andante moderato - Recorded 1963
Symphony No. 4 in E Minor, Op. 98: III. Allegro giocoso - Recorded 1963
Symphony No. 4 in E Minor, Op. 98: IV. Allegro energico e passionato - Recorded 1963
Bach, JS: Concerto for Two Violins in D Minor, BWV 1043: II. Largo ma non tanto
Bach, JS: Concerto for 2 Violins in D Minor, BWV 1043: II. Largo ma non tanto
The History of Classical Music: The Best of the Baroque Period
Bach, J.S.: Concerto for 2 Violins in D Minor, BWV 1043: II. Largo ma non tanto (Opening)
The Most Peaceful Classical Album in the World...Ever!
"Allegro" - Berlin Philharmoniker plays Bach, Beethoven & Mozart
Violin Concerto No. 1 in A Minor, BWV 1041: I. [Allegro moderato]
Concerto for 2 Violins in D Minor, BWV. 1043: I. Vivace