Essay
The notary's trick: a thirteenth-century idea that solves the AI problem
A Bolognese notary in 1240 did not read your contract. They watched you sign it. The reframe, identity over content, is what AI provenance has been missing.
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Methodology
What a hallmark on a 1730 silver spoon has to do with your portfolio
Four small marks on a London silver spoon from 1730 still hold up in court today. Not because the silver lasted. Because the office that struck them is still the office.