Has anybody actually seen the Tesla purchase on the blockchain to prove it actually happened?..would be interesting to see it if it was a single transaction?
You can search for yourself because I do not think that Tesla will easily give proof to the public. It is about their finances, and they only show it to the institutional or the government. But we already see what SEC said about Tesla investing, so that can be the proof from Tesla that they already invest in bitcoin. Tesla itself will secure their finances or investment from the hackers to be careful to tell about how much money they already invest in bitcoin.
Even if we check on the blockchain for the transaction hash, we can only guess without knowing which wallet that Tesla uses to store their bitcoin. So that will not be easy to search for the wallet address.