As Lonnie posted, the intention was not to offend or disrespect you, hence why I said there are reasons for players to be skeptical.
This is based on the fact you joined on the 5th Sept, and by the 9th you had shot a par round on St Andrews, and a slightly over par on Erin Hills( both on the 9th Sept).
All before you hit level 5 on the 10th, which indicates little or no practice before (as the rise through the lower levels is very rapid as I recall).
This will set off the warning bells for most players. As Lonnie says, multi-accounters are a dime a dozen
I remember when I started, I struggled to get anywhere near par....for ages. The game has changed, and the game may have only been CTTH when you joined/played, which makes your scoring very impressive without prior knowledge.
You may well be genuine, and if so, I wish you well, but you mentioned the trust factor.....all I did was explain why.