On April 25, 2024, Laurentmt, co-founder of the Bitcoin blockchain exploration platform OXT, posted a succinct message on X: “RIP OXT.” His announcement confirmed that the platform’s servers had been taken down by U.S. federal authorities, effectively ending a service that had been an indispensable resource for blockchain researchers and analysts since its acquisition by Samourai Wallet in December 2017.
A Brief History: From Acquisition to Shutdown
OXT was originally an independent blockchain explorer that offered advanced features such as custom address annotations and transaction linkage analysis, capabilities that many mainstream explorers lacked. On December 21, 2017, Bitcoin advocate Beautyon revealed on X: “Samourai [has] just acquired OXT. This is highly significant, and is exactly the sort of acquisition you would expect rational business owners to make; accumulate complimentary, high quality businesses to create a stellar portfolio.” Samourai’s blog at the time echoed the sentiment: “We acquired the OXT project in 2017. Something we were very proud to do, as we successfully outmaneuvered a known adversarial chain analysis company to secure the property as freely available to the public. Democratizing access to analysis software.”
For over six years, OXT operated as a public good within the crypto ecosystem, maintained by Samourai’s team. But the legal storm broke in April 2024 when the U.S. Attorney’s Office for the Southern District of New York indicted Samourai Wallet co-founders Keonne Rodriguez and William Lonergan Hill on charges of money laundering conspiracy and operating an unlicensed money transmitting business. U.S. Attorney Damian Williams stated that the founders “knowingly facilitated the laundering of over $100 million of criminal proceeds.” Immediately after the indictment, all Samourai-related websites, including the company blog and the OXT platform, became inaccessible.
The Role of OXT in Blockchain Research
OXT distinguished itself by maintaining detailed annotations for blockchain addresses linked to known hacks, breaches, and illicit activities. Researchers relied on these annotations to track the flow of stolen funds, identify patterns in transactions associated with darknet markets, and produce literature on Bitcoin privacy. Although the platform is no longer active, Laurentmt shared an archive of OXT research posts that catalog some of this work.
The tool was particularly valued for its ability to flag addresses that traditional explorers did not highlight, making it a crucial asset for investigators and journalists analyzing high-profile incidents such as exchange hacks and ransomware payments. Its closure leaves a gap in the open-source blockchain analysis ecosystem.
Privacy vs. Regulatory Overreach
The indictment and subsequent shutdown have reignited debate over financial privacy and government overreach. Privacy advocates argue that the charges against Samourai’s founders are weak and riddled with errors, and that prosecuting the creators of privacy tools and their associated analysis platforms sets a dangerous precedent. “This is an outright intrusion on financial privacy,” many commentators concluded. The fact that OXT—a neutral data platform used for both good and bad purposes—was taken down simply because of its ownership ties to Samourai raises concerns about the chilling effect on similar open-source projects.
As of now, all online platforms linked to Samourai Wallet remain offline. The cryptocurrency community mourns the loss of OXT while grappling with the broader implications of this crackdown. The question lingers: if a publicly available blockchain explorer can be shut down for its association with a privacy wallet, which tools will be next?