See a seal come to life
Enter any text or URL and generate a sample 2D code, then see the parts of a real Visible Digital Seal that BioSeal would sign in production.
Generate a sample code
This demo renders a standard QR code in your browser. In production, BioSeal signs the payload with the issuer's private key (ECDSA) and encodes a Visible Digital Seal.
Enter some text above and generate a code to preview it here.
What BioSeal would sign in production
A real BioSeal wraps your data in a signed structure. Here is the shape of a Visible Digital Seal.
Header — standard, version, issuing country, certificate reference
Payload — your use-case data (MessagePack), optionally a biometric template
Signature — ECDSA over header + payload
How verification works
Decode
A compliant reader decodes the symbology and reads the header and payload.
Chain of trust
It resolves the manifest and walks the trust lists to validate the issuer's certificate.
Verify
It checks the ECDSA signature and, for biometric seals, matches the holder — offline.
Building a real integration?
Use the BioSeal REST API to create and verify seals, or embed the SDK for on-device issuance and offline verification.