Most cryptocurrency platforms and payment gateways (Bitpay, Binance, Localbitcoins and others) keep track of your financial activities in order to maintain KYC (Know Your Client) compliance. Blockchain analysis tools by Bitfury, Chainalysis and Elliptic are widely applied to analyze on-chain transactions, reveal the origin of coins, and link your addresses to real world data bases.
Did you just spend your Bitcoins on a gadget with a door-to-door delivery? Or top up your
accounts at a stock exchange through a chain of wallets? Make a transfer to
Localbitcoins?
That’s it. Your identity has just been disclosed. Those solutions
have learnt to map transactions from bitcoin mixers, CoinJoin wallets and mark them as
suspicious.