This is a demo post with XO chain frontmatter. When you view it on the site, the Canonical chain block below will show links to:

• View in Vault — the vault_url from frontmatter
• View Ledger Day — derived from ledger_day (or post date)
• Merkle Proof — same day on the ledger
• PDF — ledger day PDF
• Digest JSON and Validate — derived from the post date (or digest_day)

All of these URLs are computed at build time; no backend required.