Verifier

Paste any Sealed for AI seal ID or hash. Anyone can verify — no account required.

Seal ID or full hash

Try the prefilled value — it's a real seal from our flagship customer.

What this checks

The seal exists in the public chain index
Ed25519 signature is valid
ML-DSA-87 (post-quantum) signature is valid
Base L2 anchor is valid
Retention window has not expired
The directive metadata (subject, timestamp, watermark) matches what was minted at seal time

What this does NOT check

That the artifact is correct or legal — we sign what you give us
That you have the artifact bytes — verifying the seal exists is separate from verifying a specific artifact hashes to the same value
That the signing key was not compromised — key compromise reports are at /security

Verify yourself, locally

For independent verification (auditor / forensic / regulator workflow):

# Ed25519 signature verification, no EpochCore software needed
from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PublicKey
import base64

seal = fetch_seal("EP-DKAP-...")  # via /api/verify
pubkey = Ed25519PublicKey.from_public_bytes(
    base64.b64decode(seal["signing_public_key_b64"])
)
signature = base64.b64decode(seal["signature_b64"])
message = bytes.fromhex(seal["full_hash"])
pubkey.verify(signature, message)  # raises if invalid

Full verification flow: docs.