No, because justification isn't proof
And neither is evidence necessarily justification.
Fingerprints on the murder weapon are evidence in favour of a guilty verdict. But, taken singly, they do not justify a guilty verdict.
For an example, if I roll a die six times and it comes up an ace each time, I can justify a belief that the die is loaded and will always roll aces. Even if it isn't, that's where the current evidence points.
Well let's plug your example into what I said.
I roll a die and get six consecutive aces - I form the belief that the die is loaded.
Subsequently I discover I am wrong - the die was perfectly fair.
Then, some time later and with a different die, I roll another six consecutive aces.
Do I then say that I know this die is loaded? Obviously not.
Having previously reached the same conclusion on the same evidence and been wrong, I would be more cautious this time.
But if I don't regard this evidence as justification this time, why would I conclude that it was justification last time, when I didn't know better?
I wouldn't. I would have to conclude that I was wrong in thinking it justified my belief.
Similarly, I can have an unjustified belief that is nevertheless true.
Well of course you can - but it is hardly relevant, is it?
Well, that's just plain silly. You didn't know that the die was loaded before you started rolling it. You might not even have known the concept of a loaded die.
It is not under contention that you could start rolling the die without having a concept of a loaded die.
What is under contention is that you could justify the conclusion that the die was loaded without having a concept of a loaded die.