The series of CD releases of the music of Thomas de Hartmann is largely the work of The Thomas de Hartmann Project, a group of dedicated volunteers and individuals joined by the common goal of bringing Thomas de Hartmann’s music to public attention. The primary aim of The Thomas de Hartmann Project is to make publicly available the compositions of Thomas de Hartmann; today a music as strangely inaudible as the composer is invisible, outside small groups familiar with de Hartmann's musical collaborations with G.I. Gurdjieff.

• Trois Morceaux, Op. 4, Nos. 2 & 3 (1899)
• Three Preludes, Op. 11 (1904)
• Twelve Russian Fairy Tales, Op. 58 (1937)
• First Piano Sonata, Op. 67 (1942)
• Two Nocturnes, Op. 84 (1953)
• Six Pieces, Op. 7 (1902)
• Divertissement, From “Forces Of Love & Sorcery”, Op. 16 (1915)
• 2-9 Humoresque Viennoise, Op. 45: Hommage à Johann Straus
• Lumière Noire, Op. 74 (1945)
• Musique Pour La Fête De La Patronne, Op. 77 (1947)
• Second Piano Sonata, Op. 82 (1951)