Rule Question

[[Sanguine Bond]] is on the board. I play [[Blood Tribute]] kicked.

How do the spells resolve? My understanding is that the triggered ability of Bond goes on the stack after the cast of Blood tribute.. But resolving the ability of Bond doesnt make sense if I havent gained HP yet.

Since the combo is supposed to be a oneshot, I would guess that the 'numbers' how much dmg and healing ist dealt are ' locked in' when the spell is cast? How does this work?

Thanks for the help!