>>jhildi+sq
That's not enough, because the blockchain contains the transaction history. It is possible to anonymize Bitcoins via Tor. You would anonymously create many wallets, and transfer through mixing services. Then, using
https://blockchain.info/, you would check for taint among your adddresses.
However, that would not be so easy for hundreds or thousands of Bitcoins. It's hard for a snake to discreetly swallow a pig. Numerous wallets and small transactions would be prudent. But the process could probably be automated.