This is the one on-chain beat, and it stays a beat, not a theme, because a skeptical security audience is right to
discount buzzwords. The useful property is narrow and real: a hash commitment lets you prove a specific signed document
existed at a point in time without disclosing its contents. The letter never leaves your hands; the fingerprint is the
only thing recorded, and the network fee passes through at cost. Anchoring is optional. We will keep saying "optional"
and "at cost" until it stops sounding like a pitch, because for this room it should read as a design choice, not a
product.