Founder StorySet it in Stone.
Set it in Stone.
Digitally.
For The Freelancer
securing
a service agreement
securing
a service agreement
SIIS provides technical timestamping services only. We do not provide legal advice.
Protect your important documents with a permanent digital seal. From contracts to agreements, create technically verifiable proof of what was agreed simply and securely.
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RFC 3161 compliant timestamping ensures your document's existence at a specific point in time is cryptographically verifiable.
We calculate a unique SHA-256 hash locally. Your content remains private and never touches our servers.
Your proof is locked in an immutable global ledger. This ensures your certificate remains verifiable long-term, independent of any single platform.
SIIS provides technical timestamping services only. We do not provide legal advice.