DOJ officials say they tracked the owner and users of the dark web child-porn site Welcome to Video by working with Chainalysis to trace bitcoin transactions
Federal investigators focused not on offensive hacking efforts or surveilling communications, but on the transactions using cryptocurrency.
Context & Ripple Effects
The DOJ's disclosure that US, UK, and South Korean investigators took down Welcome to Video rested not on hacking or wiretaps but on bitcoin tracing with Chainalysis — a methodological choice that turned the site's own payment rail into the evidence trail against its owner and users. The joint operation netted over three dozen arrests and a cache of 200K unique videos, making it one of the largest dark web takedowns of its kind.
The technique has since become routine: a later book excerpt on the operation showed how the case demonstrated bitcoin was traceable in practice, not just in theory, and the DOJ has since applied the same transactional forensics to seize funds like James Zhong's 50K+ bitcoin. The Dark Scandals case shows the pattern repeating — abuse sites funded by crypto, undone by the same transparency.
First-order effects
- Welcome to Video's owner and users, identified through their bitcoin transactions, face arrest and prosecution across the US, UK, and South Korea — with over three dozen already taken into custody.
Second-order effects
- Other dark web operators relying on bitcoin for payments face a proven tracing playbook, pushing demand toward mixers and privacy coins while exchanges become the choke point where traced funds touch the regulated world — as later cases like Dark Scandals, where exchanges aided identification, illustrate.
Third-order effects
- If the pattern holds, blockchain forensics firms like Chainalysis become permanent infrastructure for law enforcement, and crypto's core pitch of pseudonymous payment weakens for criminal use — the legitimacy gap between lawful and illicit crypto narrows with every traced case.
The trend: Cryptocurrency's assumed anonymity is giving way to transactional forensics as a standard law enforcement tool, with cases like Welcome to Video establishing the template now applied from dark web markets to large-scale seizures.