Am I one if the original holders after the founders?

Long story short, back when Ethereum was being originally worked on, my best friend (who is now dead, so I can't ask him) told me a friend of his was a Developer of a new crypto called ethereum. (no clue who his friend could be). My friend told me that if I let him add my email address and phone number, I would have original shares of it. So I did. Then I forgot about it. Until now. How can I find out if my dead friend actually did something with my email and/or phone number.? Or was that even a thing he could do?

It would be really nice to claim sonething like that but I don't even know now if he turned my info in to anyone.