Embedded convex surfaces in hyperbolic and anti-de Sitter spaces

We show that given a quasi-circle $C \subset \partial_\infty \mathbb{H}^3$ (respectively $C \subset \partial_\infty \mathbb{A}\mathbb{D}\mathbb{S}^3$) and a complete conformal metric $h$ on $\mathbb{D}$ whose curvature $K_h$ takes values in a compact subset of $(-1,0)$ (respectively $(-\infty,-1)$), with all derivatives bounded with respect to the hyperbolic metric, there exists a smooth isometric embedding $V : (\mathbb{D},h) \to \mathbb{H}^3$ (respectively $V : (\mathbb{D},h) \to \mathbb{A}\mathbb{D}\mathbb{S}^3$) such that $V$ extends continuously to a homeomorphism $\partial V : \mathbb{S}^1 \to C$.

In the hyperbolic case, the conclusion still holds if $C$ is an arbitrary Jordan curve.