Trust Standard Protocol
The open cryptographic standard that makes AI output verifiable — without having to ask the AI provider.
Three ways into TSP
What is your role? Pick a starting point.
For developers
Implement TSP in your system with the MIT-licensed SDK. Signing, verification and hash-chain in 30 minutes.
Read API documentationFor executives
Document AI compliance with signed receipts. Prove that every AI answer was correctly grounded in documented sources.
Read LexiCo's offeringFor governments
Sovereign-by-default — Norwegian hosting, open spec, coordination with regulators included.
Public Sector packageWhy TSP now?
Timing is critical. Here is why 2026 is the year TSP rises as the standard.
- EU AI Act takes effect 2 August 2026 — more than 40,000 EU companies are affected. Compliance must be provable, not just claimed.
- ISO 42001 is the likely harmonised standard — the TSP Evidence module maps directly to Annex IV.
- Production-ready today — v3.0.0-alpha.6 with 223 of 223 tests passing. No vaporware.
- Norwegian roots + open spec — sovereign tech with MIT licence. No lock-in, no foreign interfaces against the core.
LexiCo and TSP
LexiCo AS in Tønsberg, Norway has built and maintains TSP. The business model is open core: the standard is free (MIT) — we earn on the tools around it (Risk, Oversight, Evidence) and on Public Sector packages with Norwegian hosting.
We also offer Academy courses that teach compliance teams how to use TSP in practice — from signing to audit dossier.