Since most of the coins are mined using various addresses that aren't affiliated with one another, there would be no way to prove that they belong to satoshi or others. There were no evidence that satoshi stopped mining right after 2009 and he could have mined throughout the years using other addresses. Satoshi has also made a transaction to hal finney so the addresses were not all untouched.

Disclaimer: I can’t assure with 100% certainty that the all the black dots are owned by Satoshi, but almost all are owned by a single entity, and that entity began mining right from block 1, and with the same performance as the genesis block. It can be identified by constant slope segments that occasionally restart. Also this entity is the only entity that has shown complete trust in Bitcoin, since it hasn’t spend any coins (as last as the eye can see). I estimate at eyesight that Satoshi fortune is around 1M Bitcoins, or 100M USD at current exchange rate. I’m sure there will be plenty of people that will carefully analyze the source data set and come up with the exact figure, which will be very close, but nevertheless they will scream at me again.

So the next thing I did is try to find the reason for such an awkward probability distribution in the LSB of the nonce. So I divided the graph into two: one for “Satoshi” coinbases and one for the remaining coinbases. To identify Satoshi coinbases I used a coarser method than the original: I just separated spent coinbases and unspent coinbases, which identifies Satoshi coins with good accuracy.