I don’t completely understand the relationship of the background photo to the “sun tracks.”
It appears there are two intersecting roads in the foreground.
Why aren’t there blurred images of vehicles or pedestrians that block our view of the house and the trees in the background?
You’re looking at a 24-hour exposure of the sun, with all of that sunlight only becoming a simple “stripe”.
Even a truck parked in front of the pinhole camera for an hour would “show” as a “dark spot” across the sun’s stripe for that day (one day’s declination angle is between each track) for that one hour.