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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c8f2389d8073a86eb1e337b9b2fecb4a8713766728f97c40b29f87a7144b88. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4e1131f-039f-471e-9112-a2328d72e4fb.json and https://artists.proofprofile.net/proofs/artist/c4e1131f-039f-471e-9112-a2328d72e4fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 1: II. Quarter note = 60-84 - Allegro
Symphony No. 3: I. Allegro ma non affettuoso
Symphony No. 3: IV. Larghetto, quasi senza metrum
Sumera: Musica Tenera / Piano Concerto / Symphony No. 4
Piano Concerto: I. Come cercando un tempo — (attacca)
Symphony No. 4, "Serena borelis": I. Allegro ma non affettuoso
Symphony No. 4, "Serena borelis": II. Lontano e sonore — (attacca)
Symphony No. 4, "Serena borelis": III. Lontano e sonore: Cadenza per chitarra e percussioni — (attacca)
Symphony No. 4, "Serena borelis": IV. Feroce — (attacca)
Symphony No. 4, "Serena borelis": V. Dolce e pianissimo
Sumera: Symphony No. 5 / Music for Chamber Orchestra / In Memoriam
Music for Chamber Orchestra: I. Energico
Music for Chamber Orchestra: II. Cantabile
Sumera : Symphone for Strings and Percussion
Sumera : Piano Concerto : I Come cercando un tempo
Lepo Sumera: Filmmusiken aus estnischen Filmen
Dr. Stockmann - Thema 1, Thema 2, Der Zweifel (Kahtlus), Thema 3
Die Fruehlingsfliege, Kewadine Kaerbes - Walzer (Valss)
Das Verpasste Treffen (Varastatud Kehtumine) - Thema (Teema)
Der Vogelbeobachter, Vaatleja - Thema (Teema)
Der Vogelbeobachter, Vaatleja - Lepo Sumera, Loneliness
Der Vogelbeobachter, Vaatleja - Lepo Sumera, Gebirge Im Winter (Talvine Maastik)
Der Krieg, Soeda - Kampf und Frieden (Voeitlus ja loepurahu)
BBB - fuer Boris Bagger und seinen Freund
Zwei Stuecke fuer Solovioline I Rapsodico
Zwei Stuecke fuer Solovioline II Energico
Senza metrum - Senza metro per clarinetto e pianoforte
Lupus in fabula fuer vier Saxophone - I. Allegro Animato
Lupus in fabula fuer vier Saxophone - II. Allegro Animato
Lupus in fabula fuer vier Saxophone - III. Andante
Lupus in fabula fuer vier Saxophone - IV. Allegro
Lupus in fabula fuer vier Saxophone - V. Allegro non troppo
Lupus in fabula fuer vier Saxophone - VI. Andante
Lupus in fabula fuer vier Saxophone - VII. Allegro Animato
BBB - für Boris Björn Bagger und seinen Freund
Sumera: Symphony No. 6 / Cello Concerto / Musica Profana
Cello Concerto: III. Poco a poco accelerando
Scenario for Flute, Bass Clarinet and Piano
Two Pieces from the Year 1981: The Piece from the Year 1981
Two Pieces from the Year 1981: Pardon, Fryderyk!
Two Sonnets of Shakespeare: N° 128: My Music
Two Sonnets of Shakespeare: N° 121: 'Tis Better to Be Vile
Sumera: Mushroom Cantata / Concerto Per Voci E Strumenti / Island Maiden's Song From the Sea
Concerto per voci e strumenti (Concerto for voices and instruments): I. Furioso
Concerto per voci e strumenti (Concerto for voices and instruments): II. Moderato
Concerto per voci e strumenti (Concerto for voices and instruments): III. Allegro misterioso
Kui tume veel kauaks ka sinu maa (Though Your Homeland May Be in Dark for Long)
Seenekantaat (Mushroom Cantata): I. Carmen veris [Spring Song]
Seenekantaat (Mushroom Cantata): II. Timor [Fear]
Seenekantaat (Mushroom Cantata): III. Carmen autumnus [Autumn Song]
Seenekantaat (Mushroom Cantata): IV. Luxuria
Saare piiga laul merest (Island Maiden's Song from the Sea)
Ten Canons (Kadri-Ann Sumera, Hanna Heinmaa)
One Without Two (Kadri-Ann Sumera, Hanna Heinmaa)
Piano Concerto Pt. 1 (Kadri-Ann Sumera, Estonian National Symphony Orchestra, Cond. Arvo Volmer)
Piano Concerto, Pt. 2 (Kadri-Ann Sumera, Estonian National Symphony Orchestra, Cond. Arvo Volmer)
Piano Concerto I Come Cercando Un Tempo - Live
Piano Concerto II Incantando. Feroce - Live
Lepo Sumera: Symphony No. 1 (1981): 2nd movement
For B. B. B. and His Friends: Boris Björn Baggerile ja tema sobrale
Mandolin for Romantic Moments (Famous Classical Music)
Boris Bjorn Baggerile ja tema sobrale (for B.B. Bagger and His Friend): For Boris Bjorn Bagger and his Friend
Quasi improvisata (Arr. For cello and accordion)
Geringas, David / Draugsvoll, Geir: Quasi Improvisata