Chain of Custody

Built for Lara Logan · Award-Winning Journalist · Board Member, America's Future

A reporter's evidence workbench: cryptographic timestamping on every source document and note, provably untampered.

✎ Tried it? Share pilot feedback →

Cases

Items logged

Custody events

SHA-256

Hash · append-only

Cross-device sync · off by default

Cases

Evidence drop — Operation Clearwater

Drop any real file from your device. It is hashed with SHA-256 in your browser — the bytes never leave this device — and gets an instant, signed custody receipt you can re-verify or hand to a lawyer.

Drop a file here

or click to choose — document, photo, recording, anything. Hashed locally; nothing uploaded.

No receipt yet. Drop a file above to issue your first signed custody receipt.

A receipt's Verify link opens a standalone page that recomputes the seal from the published key AF-SUMMIT-COC-PUBLIC-KEY-v1 — anyone can confirm it offline, with no trust in this app. Open the independent verifier →

Verification console

chain-of-custody · verify.log

# chain-of-custody · verification console

# every custody event is hash-chained: h(n) = SHA-256( h(n-1) + entry ).

# alter any past entry and every later hash breaks. all computed locally —

# no file content ever leaves your device.

# select an item, then run a tamper check or verify the full ledger.

Showcase demo for the America's Future 80th Anniversary Summit. Showcase · best home: Nonprofit / LLC tooling. Seeded with realistic sample data; runs payment-dark (no billing). Not a production system.