# PRODUCTS & MODULES

This section describes the **Uanataca Timestamp** (TSA) product and service. For the full product overview and documentation index, see the [Timestamp homepage](/products/namirialpkiaas/timestamp/homepage).

## Service overview

**Uanataca Timestamp** is a **qualified timestamp service** (TSA) with full legal value, compliant with European Regulation 910/2014 and **RFC-3161** (Time-Stamp Protocol). The service does not use a REST API; it uses request/response messages over TCP (e.g. over HTTP with curl and OpenSSL).

- **What it does** — Binds reliable date and time and integrity to data; provides irrefutable proof that data existed before a given time.
- **How it works** — Client sends a hash (e.g. SHA-256) in a timestamp request (.tsq); TSA returns a signed timestamp token (.tsr). The original document is never sent.


For endpoints, authentication, and usage, see [GET STARTED](/products/namirialpkiaas/timestamp/enterprise-documentation/get-started/overview). For the step-by-step workflow with OpenSSL and curl, see [Usage reference](/products/namirialpkiaas/timestamp/enterprise-documentation/developer-documentation/api/usage-reference).