I have had to do that before. We would use a high lift jack to push the old beams up to level and close the crack, then do as you did and splint it from both sides. That repair will last a lifetime
Oh there was no way to get a Jack to lift the old beams, at least no Jack I could have gotten would have been tall enough. From my basement floor to that joint it’s like 12-13ft.
The floor feels pretty solid now. I probably should have checked the rest of the house. We luckily have a drop ceiling in the basement