Audit ledger · public
Verify a signed memo.
Every DELIDEC memo is sealed with a SHA-256 anchor embedded in the Sigillum wax seal. Paste the hash from any memo — we don't store the memo, only the seal manifest. If a single byte of the memo changes after sealing, the hash breaks. Forever.
Try the public sample ·
paste the sample memo hash
★ How the seal works
- Each verdict gets a memo. The memo's content (question, votes, chair positions, citations, confidence band, timestamps) is concatenated in a canonical order.
- SHA-256 is computed over that canonical content. The 64-character hex digest is embedded in the memo's Sigillum seal and printed on the PDF / web page.
- Anyone can verify. Paste the hash on this page. The audit ledger returns: signing chain, timestamp, citation manifest, and current status. We never store the memo content — only the manifest.
- If the memo changes, even one byte — the hash recomputes to a new value. The original hash returns "not found" in the ledger. Tamper is mathematically detectable.
- The customer keeps the memo. We keep the seal. Together they form the audit pair. Either alone is useless; both together are board-defensible.