Sprinkle gelatin over cold water in two bowls and let it bloom for 5–10 minutes until spongy.
Heat cream, milk, and sugar in a pan until sugar dissolves (do not boil).
Remove from heat, add vanilla, then mix in bloomed gelatin until fully dissolved.
Pour into serving glasses and refrigerate for 3–4 hours until set.
Heat orange juice, sugar, and lemon juice gently, then dissolve bloomed gelatin into it.
Cool slightly and pour over set panna cotta layers carefully.
Refrigerate again for 2–3 hours until fully set and firm.