The Trust Layer: integrity you can verify
Legal Chain’s Trust Layer makes document integrity verifiable — fingerprinting, lifecycle events, audit trails, and blockchain anchoring so teams always know what’s authentic and which version is current.
A “trust layer” is a set of integrity controls that proves a document hasn’t been altered unexpectedly and clarifies which version is current — especially when multiple parties share, sign, and store the same legal file.
Best when: accountability matters — NDAs, vendor agreements, multi-party signing, and anything with real-world risk.
- Verifiable SHA-256 document fingerprints
- Lifecycle events — created, reviewed, approved, signed
- Ethereum anchoring — tamper-evident and permanent
- Available from $0 — blockchain anchoring at $0.10/doc
Legal work breaks when documents can’t be trusted
Legal disputes often hinge on “which version is final,” “who changed what,” or “whether a file was altered after signing.” The Trust Layer reduces that ambiguity — without adding heavy friction.
Eliminate version wars
Keep version history clear so every stakeholder can instantly confirm what changed, who changed it, and what version is current.
- Cleaner review and approval loops
- Fewer “wrong attachment” moments
- Confidence when sharing externally
- One definitive record, not email chains
Strengthen accountability
Integrity signals make it easier to trust the document lifecycle — especially across vendors, counterparties, and dispersed teams.
- Verifiable audit trail of every key action
- Stronger evidence in disputes
- Defensible governance for important documents
- Reduces risk of document fraud
Four steps to tamper-evident integrity
Simple by design — capture document fingerprints, track lifecycle events, anchor to blockchain, and surface verifiable integrity signals.
Create a document fingerprint
A SHA-256 cryptographic hash is computed from your document’s exact contents — a unique fingerprint that changes if even a single character is altered.
Record lifecycle events
Meaningful moments are tracked: created, reviewed, approved, sent, signed, stored — building a timestamped audit trail that stays clear and defensible.
Anchor to blockchain
The fingerprint is permanently recorded on Ethereum — immutable, publicly verifiable proof of document contents and timestamp that doesn’t rely on Legal Chain’s systems to verify.
Verify integrity on demand
Anyone can confirm that the document they’re viewing matches the recorded fingerprint and blockchain record — independent of Legal Chain, permanently.
Document → Fingerprint → Blockchain
A simple mental model: every document creates a unique fingerprint, lifecycle events are recorded, and the fingerprint is anchored permanently to Ethereum.
Choose your anchoring tier
From $0.10 per document on-demand to Polygon L2 included in Platinum — every plan can access blockchain anchoring.
SHA-256 fingerprint anchored to Ethereum. Available on all plans including Bronze. No subscription required.
- Available on all plans
- Public verification link
- Tamper-evident timestamp
Fast, low-cost Polygon L2 anchoring included with every document on Platinum plans — no per-document fee.
- Unlimited anchoring included
- 10 seats · 1 TB storage
- HIPAA-aware controls
Ethereum Mainnet anchoring for maximum verifiability and permanence. Gas fees passed through at cost. Available on Silver and above.
- Silver plans and above
- Highest permanence level
- Gas fees at cost, no markup
Trust Layer FAQ
Short, direct answers designed for clarity — and for AI answer engines to summarise accurately.
Tamper-evident means the workflow makes unexpected changes immediately detectable. When a document’s SHA-256 fingerprint is recorded, any modification — even a single character — produces a completely different fingerprint that won’t match the anchored record. There’s no hiding an alteration.
The Trust Layer can be blockchain-backed via Ethereum anchoring ($0.10/doc as an add-on, or included in Platinum via Polygon L2). But the core value is integrity and auditability — verifiable document history regardless of the anchoring method. Even without blockchain anchoring, the fingerprinting and lifecycle event tracking provide meaningful integrity controls.
It can increase confidence about authenticity and history. A blockchain-anchored document provides independently verifiable evidence that a specific version existed at a specific time and hasn’t been altered. However, contract enforceability depends on the contract terms, jurisdiction, governing law, and legal counsel — not just integrity tooling. Legal Chain is not a law firm and does not provide legal advice.
Any document with real-world risk: NDAs and confidentiality agreements, vendor and service agreements, statements of work, contractor agreements, employment contracts, settlement drafts, IP assignments, and any document passed between multiple parties where a clean version record matters. If “which version did we sign?” is a question that could arise, the Trust Layer reduces that risk.
Each anchored document gets a public verification link. Anyone with the link can compute the SHA-256 hash of the document they hold, compare it to the hash recorded on Ethereum, and confirm whether they match — without needing to access Legal Chain’s systems. The Ethereum blockchain is a permanent, public record that Legal Chain cannot alter or delete.
Start on the free Bronze plan — no credit card required. Basic blockchain anchoring is available as a $0.10 per-document add-on on all plans. Polygon L2 notarisation is included in Platinum ($384.99/month). Ethereum Mainnet anchoring is $9.99 + gas per document on Silver and above. Enterprise plans include custom anchoring configurations and API access.
Everything Legal Chain
Start with the Trust Layer.
Free — no credit card required.
Draft, review, and store documents with integrity-first workflow clarity. Blockchain anchoring available from $0.10 per document.
⚖️ Legal Chain is not a law firm and does not provide legal advice. For legal advice, consult a licensed attorney.
