A big guy has created a website to check for black U, you can go and have a look
Recently, black U is rampant, and a small tool has been launched on the MistTrack platform to facilitate checking whether the wallet address you care about has black U risks: https://misttrack.io/aml_risks/ Note that this query is only used for AML security research purposes, and the data may not be 100% accurate, although we have been striving for rigor $BTC
