Music by Kevin MacLeod. Available under the Creative Commons Attribution 3.0 Unported license. Download link: https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100121

MacLeod's description:

Genre: Contemporary
Length: 3:44
Instruments: Piano

Opening theme I wrote for Nosferatu. Striking chord structure. Sweet melody. 013
ISRC: US-UAN-11-00121
Uplifting, Mysterious, Dark 2006