Hi GER_Nexus,
thanks for your answer.
I do not own the LSK anymore.
The transactions were sent to different BTC addresses. Is there any way to show that these BTC addresses are from Lisk?
Do you have the LSK addresses still?
The BTC addresses are definitely not publicly linked to Lisk, you might need to get in touch with the Lisk team for that.
Or you can check where the BTC went starting from your address, but it seems that they mixed the BTC after the ICO.