Hello.

Is there a way to prove that I was the person who sent money to a specific Bitcoin address?
For example, if it is not enough to simply show that a transaction over the amount of 123 arrived at
that address, but if it is required to prove that I am the "owner" (sender) of the Transaction?


Thank you!




PS
I am using Electrum on Tails without persistence, but I did make a backup (Files -> Save backup -> Backup Directory)