ShapeShift has issued a stinging rebuke of a Wall Street Journal investigative article that claimed the crypto exchange was used by criminals to launder money.

In a blog post published Monday, CEO Erik Voorhees said the news outlet's report showed a misunderstanding of how cryptocurrencies work and that the article's claims were factually incorrect.

Calling the claims "factually inaccurate and deceptive," Voorhees wrote that his exchange had been working with the Journal for nearly half a year, but the final story "omitted relevant information" and showed that "the authors do not have a sufficient understanding of blockchain and our platform in particular."

The article – published Friday – follows an investigation by the Journal into cryptocurrency exchanges. The authors concluded that some $88 million was laundered through 46 different exchanges over two years, with $9 million going through ShapeShift in that period. This was the largest sum sent through any U.S.-based exchange, the report said (though registered in Switzerland, ShapeShift operates out of the state of Colorado).

Voorhees wrote that "even if it was true" that $9 million was laundered through ShapeShift, it would represent only 0.15 percent of the exchange's total volume. Moreover, the exchange has "a strong record of complying with law-enforcement requests, providing valuable assistance in over 30 investigations in 13 different countries all over the world."

He also claimed users cannot launder fiat currencies through the exchange, saying:

Voorhees claimed that some fundamental misunderstandings of how wallet addresses work may have resulted in some of the Journal's conclusions.

He cited one example, saying that funds from a suspicious transaction were sent to an exchange, which later sent funds to ShapeShift.

"Because ShapeShift happens to be a customer of this same exchange – 10 months later in a completely unrelated transaction – the exchange sent funds to ShapeShift. The authors didn't understand how to properly read the blockchain transactions, so they assumed there was $70k in 'dirty money' sent to ShapeShift," he wrote.

Voorhees said ShapeShift has asked the Journal for additional transaction information to verify other claims, but the news organization has so far not done so.

Voorhees also asserted that ShapeShift is one of the most transparent exchanges operating today.

Every transaction through the exchange is published online, despite the user privacy protections that it has maintained to date, he wrote.

The Journal relied on this information to conduct its investigation, he said, adding that "perhaps the irony is lost on the WSJ, but the WSJ would have been unable to do this kind of investigation with any other crypto exchange, because they aren't transparent in this way."

"Ultimately, we are trying to pioneer a new financial system," he concluded. "We don't expect to be loved by the old ... yet ShapeShift has always been in favor of complying with the laws of the jurisdictions in which it operates, even though many of these laws are unclear, ever-changing, contradictory, and in some cases ineffective."

Erik Voorhees image courtesy of ShapeShift