Event Types

PacSpace fires webhooks for key moments in the verification lifecycle. Subscribe to the events your application needs when creating a webhook.

Event Reference#

Event Details#

delta.verified#

The most common event. Fires once for each delta after PacSpace completes verification. The payload includes the full proof packet (proof hash, content hash, item hashes, chain link), the original delta data, verification metadata, and current period and usage information.

Use this event to:

• Confirm your delta was recorded correctly
• Store the proof hash for your own audit trail
• Trigger downstream workflows (invoicing, reconciliation, notifications)

See the full payload schema.

delta.stored#

Fires when a batch of delta hashes has been permanently stored in PacSpace's verification layer. This event confirms that the proof data is committed and immutable.

Use this event to:

• Log batch storage confirmations
• Update internal status from "verifying" to "stored"

fact.verified#

Fires when an individual fact has been committed and verified. Facts are discrete data points associated with a record (as opposed to deltas, which represent changes).

Use this event to:

• Confirm fact data integrity
• Trigger downstream processing that depends on verified facts

checkpoint.verified#

Fires at the end of each period when all deltas are locked into a single verifiable root. The checkpoint is a cryptographic summary of the entire period.

Use this event to:

• Generate period-end reports
• Reconcile your records against the checkpoint root
• Archive period data with a verified proof

record.transferred#

Fires when ownership of a record has been transferred from one party to another and the transfer has been verified.

Use this event to:

• Update internal ownership records
• Notify relevant parties about the transfer
• Trigger post-transfer workflows

Subscribing to Events#

When creating a webhook, specify which events you want to receive in the events array:

curl -X POST https://api.pacspace.io/v1/dashboard/webhooks \
  -H "Authorization: Bearer YOUR_JWT_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://your-app.com/webhooks",
    "events": ["delta.verified", "checkpoint.verified"]
  }'

To subscribe to all events:

{
  "url": "https://your-app.com/webhooks",
  "events": ["*"]
}

Event Envelope#

Every webhook delivery uses the same envelope structure:

{
  "event": "delta.verified",
  "timestamp": "2026-02-11T10:30:00Z",
  "data": {
    // ... event-specific payload
  }
}

Next Steps#

• Payload Reference — Full payload schemas for each event
• Signature Verification — Authenticate incoming webhooks