🔒 Cryptographic proof · UK-built

The trust layer for contracts, evidence & legal records.

JurisChain gives you tamper-evident proof of existence, integrity and time for any document — sealed with a cryptographic fingerprint and independently verifiable. Your files never leave your device.

🇬🇧 UK GDPR by design eIDAS-aligned ISO 27001 roadmap
Click to select a file
Hashed locally in your browser — never uploaded

Built for where proof actually matters

Whenever a date, a signature or an unaltered record could be challenged, JurisChain gives you defensible evidence.

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Conveyancing & anti-fraud

Seal ID checks, payment instructions and property documents to evidence they were unaltered — a defensible record against payment-diversion and impersonation fraud.

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Litigation evidence

Establish an immutable chain of custody for emails, logs, photos and digital records, with a verifiable certificate you can put before a tribunal.

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IP & authorship

Prove a design, manuscript or codebase existed on a given date — independent evidence of prior art before registration or a dispute.

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Contracts

Anchor the exact signed version of an agreement so neither party can later substitute or alter it without it being obvious.

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Compliance & consent

Demonstrate to an auditor that a consent, policy or record existed and has not been tampered with — UK GDPR friendly by design.

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Embed via API

Add a verification layer to your own platform. White-label proof and certificates for your customers (wills, probate, proptech, RegTech).

How it works

Proof without ever handing over your documents.

1

Hash locally

Your browser computes a SHA-256 fingerprint of the file. The document itself never leaves your device.

2

Seal & anchor

The fingerprint is sealed with a timestamp and metadata, and can be anchored to a public blockchain for independent, trusted time.

3

Issue a certificate

You receive a portable proof file and a verifiable certificate — ready to share with a court, counterparty or beneficiary.

4

Verify anytime

Anyone can re-hash the file and confirm it matches the sealed record. If a single byte changed, the check fails.

Simple, transparent pricing

Start free. Scale when your volume does. Prices in GBP, excl. VAT.

Starter
Free
For trying it out
  • Local SHA-256 sealing
  • Proof file + certificate
  • Manual verification
  • Up to 10 seals / month
Use it now
API
From £0.50/seal
Embed in your product
  • REST API & webhooks
  • White-label proofs
  • Volume pricing
  • Sandbox keys
Talk to us
Enterprise
Custom
Platforms & regulated firms
  • SLA & dedicated support
  • On-prem / private anchor
  • Compliance pack
  • Integration support
Contact sales

Frequently asked questions

Do you store my documents?
No. JurisChain computes a SHA-256 fingerprint of your file directly in your browser. Only that fingerprint (a one-way hash) is sealed — never the document, its contents, or any readable copy. This keeps you in control of confidential material and is friendly to UK GDPR obligations by design.
Is JurisChain a law firm or legal advice?
No. JurisChain is technology infrastructure — a verification and proof layer. We are not a law firm, we do not provide legal advice, and we are not a substitute for a solicitor or a notary public. Firms use our tools alongside their own professional judgement.
How is the timestamp trustworthy?
The sealing time is recorded when you create the proof. For independent, tamper-resistant time, the fingerprint can be anchored to a public blockchain (via OpenTimestamps), so the existence of the document at that point can be verified by anyone, without trusting JurisChain.
How does verification work later?
Anyone holding the original file and the proof can re-compute the fingerprint and compare it to the sealed record. A match proves the file is byte-for-byte identical to what was sealed. Any change — even one character — produces a different fingerprint and fails the check.
Do you support electronic wills?
Electronic wills are not yet legally valid in England & Wales. The Law Commission has recommended reform built around a certified “reliable system”. JurisChain is building the proof and integrity layer that such systems will require, so partners can be ready when the law changes — but we don't represent that e-wills are valid today.
Can I embed this in my platform?
Yes. Our API lets wills, probate, conveyancing, proptech and RegTech platforms add white-labelled sealing, certificates and verification to their own products. Get in touch for sandbox keys.

Bring defensible proof to your firm

Tell us your use case and we'll set you up. Pilots welcome — especially conveyancing, litigation and IP teams.
Prefer email? contact@jurischain.co.uk