Proof of existence

Verify against Bitcoin

Paste a slug. Drop a proof bundle. Either way, your browser walks the proof against a real Bitcoin block. The server is not trusted — it only serves bytes.

no proof yet · post is unsealed

slug: now-page
content hash: —
bitcoin block: #—
rendered: 2026-08-27T05:41:02.422Z

click ≡ paste ≡ curl — same bytes:

curl -s 'https://a.getsven.com/api/verify-bundle/now-page'

The page above and this command return byte-identical JSON. The verification math runs in your browser — the server only serves bytes.

Verifies via the public Blockstream block-header API (read-only). The RFC 3161 chain is signed server-side at seal time and surfaced via GET /api/trust-verify/now-page; the OpenTimestamps proof is re-walked here in your browser. Both bundles are downloadable as raw bytes via GET /api/audit-download/now-page?type=ots|tsr|bundle.