Anyone can verify a Sealayer-anchored document instantly. Scan a QR code, upload a file, or paste a hash. No account required. No fees. No limits.
Choose the method that works best for your situation. All three produce the same cryptographic verification.
Every Sealayer-issued document contains a unique QR code. Scan it with your smartphone camera and you are taken directly to the verification result -- no app download required.
Point your camera at the QR code on the document
Upload the document file directly to our verification portal. We compute the SHA-256 hash locally in your browser and check it against the blockchain -- your file never leaves your device.
Drop your file here
PDF, PNG, JPG, DOCX
Hash is computed locally -- your file never leaves your device
If you already have the document hash (SHA-256), paste it directly into the verification portal. We check the hash against every blockchain anchor in our system and return the result instantly.
Paste any SHA-256 hash to check against blockchain records
When verification fails, you know exactly why. Sealayer detects every form of document tampering.
If even one byte of the document has been modified, the SHA-256 hash will not match the blockchain record.
If a document claims to be Sealayer-verified but has no blockchain anchor, the verification fails immediately.
If the RFC 3161 timestamp does not match the blockchain record, the document has been tampered with after issuance.
If an issuer has revoked the document, the verification will show the revocation date and reason.
Verification results are designed for clarity. Whether the document is verified, tampered, or unknown, the result is unambiguous and includes full provenance details.
Issuer: Bright Bytes Technology LLC
Blockchain: 0x3f1a...8b2e
Reason: Hash mismatch -- document has been modified
Expected: a3f8...c92d
Verify any Sealayer-anchored document. It takes 5 seconds. No account. No payment. No limits.