Cryptographic chain verification

Evidence logs that hold up in court

The tamper-proof chain-of-custody platform for private investigators, corporate IT risk teams and boutique legal firms. Every touchpoint hashed. Every receipt verifiable.

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INTAKEJ. Morrison2026-06-17 09:14:02a3f8c1... ← 000000
ACCESSEDJ. Morrison2026-06-17 11:30:44d72bc4... ← a3f8c1
EXPORTEDS. Park (lab)2026-06-17 14:07:199e1af7... ← d72bc4
RETURNEDJ. Morrison2026-06-18 10:02:552c6d83... ← 9e1af7
✓ Chain integrity verified — 4 entries, no tampering detected
Why CustodyLog

Built for investigators who go to court

A broken chain of custody has collapsed cases. CustodyLog makes yours unassailable.

🔗

Cryptographic chain hashing

Each log entry hashes the one before it. Alter a single record and every hash after it breaks — detectable in seconds. No blockchain fees, no tokens.

📄

Court-ready receipts

One click generates a printable, timestamped audit receipt for any evidence item. Include it in disclosure packs or attach it to your expert report.

🔍

Public verification URLs

Share a verification link with defence counsel or the court. They can confirm any log entry independently — without seeing your other cases.

🏢

Multi-user firm access

Add investigators, paralegals and external lab partners to your firm workspace. Every access is logged under their credentials.

📁

Case and evidence management

Organise evidence by case reference. Track file hashes, source, received date and every downstream action from intake to return.

🛡️

No cloud lock-in

Your data stays on dedicated infrastructure. No third-party forensic tools touching your evidence files. Export your audit log any time.

Workflow

How it works

1

Create a case

Open a new case with a reference number. All evidence items and their logs are scoped to that case, isolated from other matters.

2

Register evidence items

Add each item with a label, source and optional file upload. SHA-256 of the file is recorded at intake — any later modification is instantly detectable.

3

Log every touchpoint

Record accessed, exported, transferred, analysed, returned or sealed actions. Each entry chains to the last — the ledger grows but never changes.

4

Generate your court receipt

When the matter is ready for disclosure, print the tamper-evident receipt. Verification URL included so counsel can check it without calling you.

Pricing

Simple, per-firm pricing

No per-user fees. One firm, all your investigators, one monthly price. Cancel any time.

Solo
£149 /month
For independent investigators
  • 1 user
  • Unlimited cases & evidence
  • Cryptographic chain logging
  • Court receipts & verify URLs
  • Email support
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Enterprise
£499 /month
For corporate & large firms
  • Unlimited users
  • Unlimited cases & evidence
  • Dedicated instance option
  • Custom data retention policy
  • Onboarding & phone support
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