Yes, multiple ECNs, not single ECN. The only ones (single or multiples) who does know the trade are your counterpartys who you have sold to and the ECNs over which your trade was executed. Sometimes one ECN is enough to cover your trade, sometimes the trade is splitted over several ECNs, that relies on many factors and also on your broker. As I have no insight into IBKR this is up to speculation. Besides sorry about the 1:60/1:40 leverage maybe we are in different regulation zones.
NP, yeah, they have different leverage maybe.... About my question of finding my transaction in records - is that possible?
If your account sits in Europe but you are a US citizen no regulated broker in the world will open an account with you. You cant even trade FX with IB. Your only viable choice is Oanda.