Integrity verification

Each day is sealed into the one before it with SHA-256 — change any past day and this check breaks. The data is public; verify it yourself. This page fetches the raw ledger and recomputes the entire chain, live, in your browser.

The recipe (matches the publisher exactly)

hash = sha256( prev_hash + canonical({type,date,planned,done,missed_major}) )

Recomputing the SHA-256 chain in your browser…

JavaScript is off, so the live check can't run — but the verification is still yours to do. Open /history.jsonl and, for each line, recompute sha256(prev_hash + canonical(day)): every hash must equal the next line's prev_hash, and the first prev_hash is sha256:GENESIS.

Raw, public data — /history.jsonl · /public.json

This check runs entirely in your browser via the Web Crypto API — open devtools to read the exact code that computes it. Nothing here is taken on trust.