Black Hand is not a title, it is a trait unrelated to any sect. The trait is not lost if the vampire changes sect.
201510
Zubeida
G5Sabbat. Black Hand: Zubeida gets +1 bleed when bleeding a Methuselah who controls no ready vampires with capacity above 6. Scarce. Sterile.
Rulings
The scarce penalty considers the apparent clan while controlled (in case of Clan Impersonation and Banishment).