A Bitcoin wallet check traces an address's UTXO history for links to ransomware, darknet or sanctioned funds before you deposit to an exchange; Plastron's live screening currently covers EVM chains, not Bitcoin.

Bitcoin is the oldest and most scrutinized blockchain. Ransomware payments, darknet marketplace transactions, and sanctioned entity holdings all leave permanent marks on the UTXO graph. Unlike Ethereum where addresses are reused, Bitcoin's UTXO model means tainted funds can be split, merged, and passed through dozens of wallets — but the trail never disappears. Exchanges like Coinbase and Kraken run chain analysis on every BTC deposit. If any input in your transaction traces back to a known ransomware wallet or darknet market, your deposit gets flagged. The investigation process takes weeks to months. Meanwhile, your funds sit frozen. What makes Bitcoin particularly tricky is the mixing problem. CoinJoin transactions, Wasabi Wallet rounds, and even certain Lightning Network channel opens can create ambiguous provenance. Compliance teams err on the side of caution — if the origin is unclear, they freeze first and ask questions later.