Craig Wright is probably not Satoshi Nakamoto, the creator of Bitcoin.

The Australian entrepreneur recently summoned several media outlets, including the BBC and the Economist, as well as two key people from the Bitcoin community, to prove he is the elusive Nakamoto. After his proof got dissected by experts and turned out to be inconclusive at the very least, Wright publicly promised he'll follow up with better proof.

But in a new blog post, replacing his entire blog, Wright wrote he won't provide cryptographic proof he is Nakamoto after all.

"I believed that I could do this. I believed that I could put the years of anonymity and hiding behind me. But, as the events of this week unfolded and I prepared to publish the proof of access to the earliest keys, I broke. I do not have the courage. I cannot," Wright posted.

The "earliest keys" he mentions refer to the cryptographic keys tied to the earliest mined Bitcoins, which are known to be owned by Nakamoto, who created the cryptocurrency in late 2008. Many experts pointed out that simply moving a few coins from that earliest stash of bitcoins (which have never been used) would be very solid proof that a person is indeed Satoshi Nakamoto.

In the post, Wright has apologized to chief scientist at the Bitcoin foundation, Gavin Andresen, and former executive director of the Bitcoin foundation, Jon Matonis, both of whom met Wright and publicly acknowledged him as being Nakamoto. He still maintains, however, that they were not mislead.

"I can only hope that their honour and credibility is not irreparably tainted by my actions. They were not deceived, but I know that the world will never believe that now," he wrote.

Interestingly, Matonis posted a cryptic note on his Twitter account, minutes before Wright posted on his blog.

There won't be an on-chain signing from early bitcoin blocks, but there also won't be another Satoshi. — Jon Matonis (@jonmatonis) May 5, 2016

There are no accounts of anyone ever meeting Satoshi Nakamoto. He only communicated with early Bitcoin developers and adopters electronically, mostly through emails and message boards, prior to disappearing in 2010. His total stash of bitcoins is estimated to be roughly one million, or some $447 million in today's value.

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