CLIENT-SIDE — YOUR DOCUMENT NEVER LEAVES YOUR DEVICE
Verify Seal
Upload a sealed PDF to verify its SHA-512 hash, check Bitcoin timestamp (OTS), and confirm the seal's authenticity. Verification runs in your browser — your document is never uploaded. Anonymous outcome sharing is optional and helps improve the engine.
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Drag & drop a sealed PDF (or encrypted .voice file) here, or click to browse
Supports VO-DSS sealed documents (.pdf with embedded metadata)
Verifying seal...
QR Code — Scan to Verify
Contains full SHA-512, OTS digest, seal metadata & verification URL