Evidence Vault

Every file. Hashed. Chained. Immutable.

Safety Ink automatically builds a forensic-grade evidence package the moment SOS is triggered, cryptographically sealed, cloud-backed, and formatted for police or a legal representative at a single tap.

What's captured

Your case, built automatically in the background.

From the moment of trigger to the moment of resolution, every piece of evidence is collected without you needing to do a thing.

🎙️

Audio Recording

3 minutes of encrypted audio beginning at the instant of trigger. Captures the environment, voices, ambient sounds: everything in the immediate vicinity. SHA-256 hashed on-device before upload so the recording cannot be altered after the fact.

📸

Photo Burst

Front and rear cameras capture simultaneously every 10 seconds. Face of the attacker, surroundings, scene. Each image individually hashed and uploaded with a server-verified timestamp; the sequence cannot be reordered or images removed.

📍

GPS Timeline

Location recorded every 15 seconds. Builds a detailed movement log from trigger to resolution, shareable in real time with trusted contacts. The GPS timeline is the first document in the PDF evidence bundle and maps exactly where you were, at what time.

💓

Biometric Data

If paired with a Galaxy Watch, heart rate is streamed and recorded throughout the incident. Elevated heart rate at time of trigger provides biometric evidence of distress, a data point the defence cannot challenge without independent medical records.

⏱️

Server-Verified Timestamps

Every piece of evidence carries a timestamp verified against the server clock, not the device clock. Date, time, and sequence order are cryptographically fixed at the moment of capture. Nothing can be backdated, reordered, or altered.

The SHA-256 chain

Tamper-proof. Mathematically verifiable.

Each piece of evidence carries a SHA-256 fingerprint of its content. That fingerprint is incorporated into the next item's hash , creating an unbroken chain that links every file in the exact order it was captured.

If any file is deleted, altered or reordered, even a single byte, the entire chain breaks. An expert witness can verify integrity in minutes. The defence cannot selectively remove unfavourable evidence.

🔗

Chain of custody, automated

No human handling required. The cryptographic record is created and sealed at the moment of capture.

☁️

Offline cache: nothing is ever lost

If there's no signal, evidence is queued locally with the same hash chain and uploaded the moment connectivity returns.

🔐

Vault access is controlled

Only the account holder and designated Emergency contacts can access the vault. Attackers cannot reach or delete it.

🎙️

Audio Recording · 14:23:07

sha256: a3f8b2c1d4e9… ← genesis block
📸

Photo Burst #1 · Front + Rear · 14:23:17

sha256: 9d7e1a0b3c5f… ← prev: a3f8b2c1…
📍

GPS Snapshot · 14:23:22

sha256: 2b6c8d0e4f1a… ← prev: 9d7e1a0b…
💓

Heart Rate · 127 bpm · 14:23:30

sha256: 7f3a9c1e5b2d… ← prev: 2b6c8d0e…
📸

Photo Burst #2 · Front + Rear · 14:23:27

sha256: 4e8a2f6b9c1d… ← prev: 7f3a9c1e…
The evidence bundle

One tap. A complete prosecution-ready package.

When you're ready to share, Safety Ink generates a formatted PDF evidence bundle containing everything a police officer or solicitor needs to begin a case.

Full GPS timelineEvery location update from trigger to close, mapped with timestamps
SHA-256 hash manifestEvery evidence file with its hash value and chain position
Audio and photo referencesDirect URLs to all stored files with access tokens for authorised personnel
Incident metadataDevice ID, trigger method, network conditions, all timestamps in court-readable format
SAFETYINK_BUNDLE_20260609_142307.pdf
SHA-256 MANIFEST · INCIDENT 2026-06-09
audio_142307.aaca3f8b2c1…✓ VALID
photo_front_142317.jpg9d7e1a0b…✓ VALID
photo_rear_142317.jpgc2e5f8a3…✓ VALID
gps_142322.json2b6c8d0e…✓ VALID
heartrate_142330.json7f3a9c1e…✓ VALID
photo_front_142327.jpg4e8a2f6b…✓ VALID
gps_142337.json1d9c3b7a…✓ VALID
Your case, protected

Evidence that can't be disputed.

The vault is free. The app is free. Your evidence is yours.