Verify Export Integrity¶
CalcBridge exports include embedded provenance metadata so you can confirm that locked Foundation sheets have not been altered. The Workspace sheets are editable by design and are not part of the integrity hash.
Who Should Use This¶
- Compliance or risk teams validating the integrity of a workbook before distribution
- Portfolio and analytics teams confirming a file hasn’t been modified outside CalcBridge
- External recipients who want a simple proof of integrity
Verify an Export (Web)¶
- Open Verify Export at
/verify. - Upload the XLSX export.
- Review the status and any detected differences.
If the export contains a valid CalcBridge manifest, you will see a verdict and a summary of the provenance metadata.
Status Meanings¶
| Status | Meaning | What To Do |
|---|---|---|
| Original | The Foundation hash matches the export record. | Safe to rely on. |
| Modified | The Foundation hash does not match. | Review the diff list and re-export. |
| Invalid | Manifest exists but is corrupted or fails validation. | Re-export the workbook. |
| Unknown | No CalcBridge manifest found. | Confirm it was exported from CalcBridge. |
Differences & CSV Export¶
When a file is Modified, the verification screen shows:
- The list of changed Foundation cells
- A filter by sheet/cell or status
- Export CSV to download the diff report
This diff list helps you identify exactly what changed and where.
File Size & Access¶
- Public verification: 25 MB max file size
- Authenticated verification: 100 MB max file size
Larger files should be verified after logging in.
Rate Limits¶
- Public: 10 requests/minute
- Authenticated: 100 requests/minute
Data Handling & Retention¶
- Files are processed server‑side for verification only.
- Temporary files are deleted shortly after verification.
- CalcBridge does not store uploaded content from the public verification page.
Additional safeguards include decompressed size caps, malware scanning, and sandboxed verification execution.
Re‑Import Detection¶
If you upload a CalcBridge export back into the platform, CalcBridge detects the embedded provenance and reports whether it matches the original export. This helps teams prevent tampered files from being re‑ingested.
Troubleshooting¶
- “No manifest found”: ensure you are using a CalcBridge export, not a raw workbook.
- “Invalid provenance”: the file may be corrupted or edited; re‑export from CalcBridge.
- “Modified”: compare the diff list to see which Foundation cells were changed.