On his blog “Unenumerated” in April 2008, Nick Szabo put out a public call for help implementing bit gold:
Quote from: Nick Szabo on April 27, 2008
Bit gold would greatly benefit from a demo, an experimental market (with e.g. a trusted third party substituted for the complex security that would be needed for a real system). Anybody want to help me code one up?
This request went unanswered publicly. Six months later, Satoshi Nakamoto published the Bitcoin whitepaper — a system that solved many of bit gold’s unsolved problems, including the need for a trusted third party. Szabo’s original bit gold blog post was dated December 2005, but the blog’s timestamps were later found to have been modified, complicating the precise chronology.
This implementation-request post is the load-bearing primary source in several later analyses and reports that treat Szabo’s bit-gold proximity to Bitcoin. The Nick Szabo biography treats it as the late-2008 turning point in Szabo’s pre-Bitcoin record; Szabo’s own 2011 retrospective “Bitcoin, what took ye so long?” reads it from inside; and the post-2013 identification corpus — the Skye Grey TechCrunch stylometric report, the Popper NYT investigation, the Szabo identity hypothesis, and the identity-hypotheses overview — uses this post as a documented anchor for the “Szabo was actively recruiting for a bit-gold implementation immediately before Bitcoin shipped” data point.