Silent shrinkage
You can't prove when a package was opened. Disputes just get written off as 'driver error', and insurance won't cover something nobody can prove happened.
✕ Losses go unnoticed
Proof
SealStack tracks every seal from the moment it's registered to the moment it's delivered. Every scan is recorded and signed, so you always know who touched a package and when. When something goes wrong, you settle it with the timeline, not with someone's word against another's.
Lifecycle ledger · live
RS-LAS-2026-0091·STL-LAS-0142
Stocked
[STK]SigningImported into inventory · Lagos Main
Bound
[BND]Sealed to package · device verified
Pickup
[PCK]Rider scan · GPS captured
In transit
[TRN]Live signature · offline tolerated
Delivery
[DLV]Recipient scan · seal intact
Verified
[VRF]Locked in · published for anyone to check
Hover to pause. Every event signed on-device.
Reconciliation
Every scan is checked against what your business system already expects, automatically. When they agree, nothing happens. When they don't, it's flagged for review right away, before it turns into a customer dispute.
Reconciliation · live
RS-LAS-2026-0091
Physical scan
Your system
Delivery status
Delivered · recipient confirmed
Delivered
Seal integrity
STL-LAS-0142 · verified intact
Seal ID matches
Evidence
Photo + signature captured
No evidence on record
Checked against your system in real time.
01 · Problem
Silent shrinkage
You can't prove when a package was opened. Disputes just get written off as 'driver error', and insurance won't cover something nobody can prove happened.
✕ Losses go unnoticed
Disputed deliveries
The customer says it arrived damaged. The driver says it was fine. Without a real record, you lose that argument, every time.
✕ You take the blame by default
Compliance theatre
PDFs and spreadsheets that nobody actually trusts. No signatures, no proof, nothing an auditor can verify.
✕ Nothing holds up to scrutiny
02 · Mechanism
Station 01
Seals are registered and assigned to a branch before they're ever used. Any seal that isn't registered gets rejected automatically.
Station 02
A package is locked to one specific seal. That action is signed by the worker's own registered device.
Station 03
Every handover is scanned and signed, even with no internet connection. It syncs and records automatically once back online.
Station 04
Anyone can check status on a public link. Your team can verify the complete history anytime from the Audit tab.
03 · Delivery confirmation
The delivery scan is the final record in a package's journey. On top of that, dispatch can let the end customer confirm delivery as well, even if they don't have an account.
Customer confirmation never replaces the scan. It adds a second, independent check on the same timeline. If the two don't match, it's flagged right away instead of getting buried in a spreadsheet.
Bulk delivery policy
For each shipment, dispatch decides how thorough scanning needs to be: scan every seal, spot-check some against the manifest, or check the manifest only for high-volume runs.
Customer confirmation
Let customers confirm delivery too, even without an account, with a link they open or a code the rider gives them. It's recorded on the same timeline as everything else.
Sample event · raw payload
[PERSISTED]
{
"id": "EVT-2026-LAS-92117",
"type": "PUBLIC_RECEIPT_CONFIRM",
"seal_id": "STL-LAS-0142",
"shipment": "RS-LAS-2026-0091",
"actor_role": "receiver",
"confirm_channel": "customer_link",
"code_verified": true,
"matches_manifest": false,
"client_ts": "2026-05-04T14:26:10Z",
"server_ts": "2026-05-04T14:26:11Z",
"prev_hash": "0xa7f9b491…",
"chain_hash": "0xa7f9b71a…"
}Chained after DELIVERY_SCAN · unsigned, server-authored · attributable to the receiver's confirmation
04 · Reconciliation
Every scan is compared against your business system in real time. When they agree, nothing happens: that's the point. When they don't, it's flagged before it becomes a dispute.
Checked automatically
Every scan is compared against what your business system already expects for that shipment. No one has to look it up.
Mismatches surface immediately
If the physical record and your system don't agree, it's flagged for review right then, not discovered weeks later in a complaint.
No manual spreadsheet work
Nobody is cross-checking exports by hand at month-end. The comparison happens as events come in.
Physical scan
Your system
Delivery status
Delivered · recipient confirmed
Delivered
Seal integrity
STL-LAS-0142 · verified intact
Seal ID matches
Evidence
Photo + signature captured
No evidence on record
Exception flagged
Routed for review
05 · Trust model
Every event is written once and locked in place. Each entry links back to the one before it, so if anyone tried to alter history, it would break the chain and show up immediately. At the end of each day, that day's records are sealed for good.
Nothing gets edited
Corrections are added as new entries that reference the original. The original record never changes.
On-device signing
Every scan is signed by the worker's own registered device. A stolen password can't be used to rewrite the past.
Daily lock-in
Each day's records are sealed together so they can't be altered afterward. Your team can verify this anytime from the Audit tab, or export the full history for an outside auditor.
Sample event · raw payload
[PERSISTED]
{
"id": "EVT-2026-LAS-92114",
"type": "DELIVERY_SCAN",
"seal_id": "STL-LAS-0142",
"shipment": "RS-LAS-2026-0091",
"actor": "DEV-LAG-RD-013",
"client_ts": "2026-05-04T14:21:08Z",
"server_ts": "2026-05-04T14:21:11Z",
"lat_lng": "[6.4541, 3.3947]",
"evidence": "sha256:0x4c91…d7e2",
"prev_hash": "0xa7f9b491…",
"chain_hash": "0xa7f9b5fa…"
}06 · Public verification
A read-only URL anyone can hit. No login. No app. The only thing they need is the seal id or the QR on the package.
Anyone can scan the QR code or open the link and get a clear answer, no guessing: valid · replaced · broken · suspicious · invalid.
The page only shows what you choose to share. Personal details stay hidden. Every event on it comes from the same secure record your team can verify anytime from the Audit tab, and you can export the full history for an outside auditor on request.
/verify/ssv_live_demo
[STAMPED]
Status
VALID · INTACT
Anchor
Anchoring…· today's events settle into a Merkle root end of day
Full chain verifiable in the Audit tab
07 · Field
SealStack's mobile app is what your riders and warehouse staff actually carry, built for the loading bay, the back of the truck, and the front porch, not just the dashboard.
Works with no signal
Scans are saved with the real time they happened, and sync automatically the moment you're back online.
Never loses a scan
A scan that syncs late still keeps its true timestamp and gets flagged for review. Nothing is ever silently dropped.
On-device signing
Every scan is signed by the worker's own device. A stolen password can't be used to fake one.
GPS evidence
Location is captured automatically with each scan, when available, no extra steps needed.
Begin