Document authenticity
Built on cryptographic proof
Not heuristics. Not metadata inspection. Byte-level SHA-256 verification that catches any modification, no matter how small.
SHA-256 Hashing
Every signed document gets a unique 256-bit cryptographic fingerprint. Change one byte and the entire hash changes.
Zero-Knowledge
Your document never leaves your browser. Only the computed hash is sent to our servers for matching.
Immutable Records
Once a document is completed, it is cryptographically sealed. The hash is stored permanently and cannot be altered.
Audit Chain
Every signing event is recorded in a hash-linked audit chain. Each entry references the previous, preventing tampering.
Independent verification
SHA-256 hash chain
RFC-3161 timestamps
Bitcoin-anchored
Made with ❤ in Arkansas·Majestic Amusements