Cryptographic Closing Seal

Verify a document against the Radiant blockchain

Drop the PDF you received. The check runs entirely in this browser tab.

Zero-knowledge · your file is never uploaded

1 · Seal reference

The email that carried this document contains a Reference ID, and its verification link ends with that value.

2 · The document you received

Drag & drop the file here or click to choose it — PDF, DOCX, or anything else

Nothing is transmitted: the digest is computed locally in this tab.

The check compares the SHA-256 of the file you hold with the digest committed on Radiant L1 inside the seal's CLSL OP_RETURN output. If the digests differ, the file changed after the lawyer signed it.

1 · Seal reference

2 · The document you received

3 · On-chain commitment