What was Silk Road?

How did Silk Road work?

Silk Road opened in about January 2011. It looked like an ordinary online shop, with listings, a basket and ratings for each seller. But its users “principally bought and sold drugs, false identification documents, and computer hacking software”, said the appeals court that later upheld its creator's conviction. On 29 January 2011 a user called “altoid” asked readers of BitcointalkBitcointalkThe Bitcoin forum Satoshi Nakamoto opened in November 2009. Much of Bitcoin’s early history, from the pizza offer to Satoshi’s last post, happened there., the Bitcoin forum, in a post the FBI later quoted: “Has anyone seen Silk Road yet? It's kind of like an anonymous amazon.com.”

Two things were meant to keep its users hidden. The site ran on TorTorA free network that hides where internet traffic comes from by relaying it through three volunteer-run computers. Bitcoin nodes can use it., a network that passes internet traffic through several computers, so nobody can easily see where a visitor is or where a site's own computers are. And Silk Road took only bitcoin. Buyers paid bitcoin into an account on the site, which held each payment until the order was complete, then passed it to the seller and kept a commission of 8 to 15 percent, prosecutors said. A “tumbler” shuffled payments through dummy transactions, which the site promised made it “nearly impossible to link your payment with any coins leaving the site”.

Silk Road's creator later argued that the ratings made drugs safer, because buyers could choose among many sellers and avoid bad ones. Prosecutors replied that “fake vendor reviews were commonplace”, the appeals court noted.

Why did Silk Road use bitcoin?

Bitcoin, launched by Satoshi Nakamoto in January 2009, let people pay each other online without a bank. In June 2011 Adrian Chen of the website Gawker wrote that Silk Road “doesn't accept credit cards, PayPal, or any other form of payment that can be traced or blocked. The only money good here is Bitcoins.”

Two US senators, Charles Schumer and Joe Manchin, read the story and wrote to the attorney general. They called bitcoin “an untraceable peer-to-peer currency” and urged him to “shut down the Silk Road network”.

Jeff Garzik, one of Bitcoin's developers, saw it differently. He told Gawker that every bitcoin payment is recorded in a public log, which the police could analyse to track down the people making them.

How was Silk Road shut down?

The investigation began in 2011, after packages of drugs sent from abroad were stopped at Chicago's O'Hare airport. Investigators in Baltimore and New York hunted the site's leader, who from January 2012 called himself “Dread Pirate Roberts”, after a pirate in The Princess Bride whose name passes from one person to the next. At times, court records show, they suspected other people, among them Mark Karpelès, who ran the bitcoin exchangeExchangeA business where people swap ordinary money for bitcoin and other coins. Coins left there are held by the exchange, which controls their keys. Mt. Gox.

Part of the trail led back to “altoid”, the FBI's complaint shows. In October 2011 the same user had posted on Bitcointalk again, looking for “the best and brightest IT pro in the bitcoin community” and asking for replies to “rossulbricht at gmail dot com”. On 1 October 2013 agents arrested Ross Ulbricht, then 29, in a public library in San Francisco, and the site was shut down.

On his computers agents found about 144,336 bitcoins. With 29,655 taken from Silk Road's servers, prosecutors called it the largest bitcoin seizure ever. The US Marshals Service sold the coins at auctions in 2014 and 2015.

The investigation had crimes of its own. Two federal agents on the Baltimore team, the appeals court recorded, used their undercover access for their own gain: Shaun Bridges of the Secret Service took bitcoins from users' accounts, and Carl Force of the Drug Enforcement Administration kept bitcoins that Dread Pirate Roberts paid him for inside information. Both pleaded guilty to money laundering and obstruction of justice, Force also to extortion, and they were sentenced to 71 and 78 months in prison.

What happened to Ross Ulbricht?

At his trial in Manhattan, Ulbricht admitted creating Silk Road but argued that he had sold it to someone else in 2011 and been lured back near the end to take the blame. On 4 February 2015 the jury found him guilty on all seven counts, among them distributing narcotics and conspiring to launder money. On 29 May Judge Katherine B. Forrest sentenced him to life in prison. The appeals court upheld his conviction and sentence in 2017, and the Supreme Court declined to hear his case in 2018.

Prosecutors had also presented evidence that Dread Pirate Roberts paid to have five people killed to protect the site. “Ulbricht was not charged in this case with crimes based on ordering these killings,” the appeals court wrote, and “while the evidence demonstrates that Ulbricht ordered and paid substantial sums for the murders, there is no evidence that the killings actually took place.” The judge weighed that evidence at sentencing. Separate murder-for-hire charges in Maryland were dismissed in July 2018, and he was never tried on any murder-for-hire charge.

On 21 January 2025 President Donald Trump announced “a full and unconditional pardon”. Libertarians and cryptocurrency supporters had argued that Ulbricht was punished for other people's transactions and that his sentence did not fit the crime, Al Jazeera reported. Senator Catherine Cortez Masto wrote on X: “Pardoning drug trafficking kingpins is a slap in the face to the families who've lost loved ones to his crimes.” The rest of his story is on his profile.

What came after Silk Road?

Copies followed. Silk Road 2.0 opened about five weeks after the original closed, “virtually identical” to it, prosecutors said. US agents took it down in November 2014 during an international operation that shut more than 410 hidden sites on Tor. In 2017 the Justice Department closed AlphaBay, which it called the largest criminal marketplace on the internet, with more than 250,000 listings for illegal drugs and toxic chemicals.

Officials also distinguished those markets from the payment system they used. At a November 2013 Senate hearing called “Beyond Silk Road”, senior Justice Department official Mythili Raman told senators that “virtual currency systems can be a legal means of exchange”. Criminals, she said, were attracted by the anonymity they thought those systems offered.

What the public record revealed

Bitcoin's white paper had set out the trade-off in 2008: “The public can see that someone is sending an amount to someone else, but without information linking the transaction to anyone.” A bitcoin addressAddressA string of letters and numbers that tells someone where to send you bitcoin, a bit like an account number for one payment. carries no name, but every payment is written into the blockchainBlockchainBitcoin's shared record of every payment since 2009, stored in blocks that each link to the one before — which is what makes it a chain., the record that every bitcoin user shares. The appeals court called bitcoin “an anonymous but traceable digital currency”.

That record caught up with Silk Road. At Ulbricht's trial the government traced the bitcoins on his laptop through the blockchain and showed that about 89 percent had come from Silk Road's servers in Iceland.

In a separate case in 2021, agents found about 50,000 bitcoins at the Georgia home of James Zhong, some on a small computer hidden in a popcorn tin in a bathroom cupboard. In September 2012 he had tricked Silk Road's withdrawal system into paying out far more than he put in. He pleaded guilty to wire fraud and in April 2023 was sentenced to a year and a day in prison.

Another trail led to coins that had sat untouched for years. In 2020 investigators, helped by a company that analyses bitcoin payments, picked out 54 withdrawals from Silk Road unlike an ordinary user's: ten of them, all made at about 3:59 a.m., were for exactly 2,500 bitcoins each. Prosecutors said a hacker they called “Individual X” had broken into the site and taken them. Ulbricht learned Individual X's online identity and made threats, but Individual X “did not return the cryptocurrency but kept it and did not spend it”.

In April 2013 most of the coins were moved to one address, where anyone could see them, and about 69,370 were still there seven years later. On 3 November 2020 Individual X agreed to give them up, the government took custody, and a payment of 69,369 bitcoins moved them out. A court forfeited them to the United States in 2022.

The transaction that emptied that address is still there to inspect: the amount, the destination and the block that recorded it. Identifying Individual X took an investigation; following the movement of those coins did not require Silk Road to stay online.