At the end of November, an unknown person signed a signature tied to an extremely old block reward mined on Jan. 19, 2009, and the user published a message and verified signature linked to the reward on the forum bitcointalk.org. The message was tied to a bitcoin address associated with block 1,018, a block reward that was minted 16 days after Satoshi Nakamoto launched the network. Upon further investigation, onchain data shows that block 1,018 is linked to a great number of block rewards ostensibly mined by Hal Finney, and the signed block is also connected to the very first bitcoin transaction that derived from block 9.

Hal Finney's light brown eyes are pointed down.

I've just asked him if he was involved in the creation of Bitcoin. The 57-year-old man's almost imperceptible eye movement is his only way of telling me that he was not, and that I've spent the last week caught in the same futile windmill-tilting that has ensnared so many other reporters trying to solve the puzzle of Bitcoin's mysterious creator known only as Satoshi Nakamoto.