A usable provenance record lets another examiner answer “Where did this object come from, what happened to it, and which conclusion relies on it?” A filename and a hash are useful but insufficient. Neither explains source selection, collection boundaries, transformations, or why a rendered item differs from its parent.
Start with a source statement
Assign a stable evidence identifier and describe the device, account, service, path, or other origin within the authorized scope. Record the acquisition method, operator reference, start and end times with offsets, tool and version, relevant settings, and errors. Distinguish information observed by the collector from information supplied by another person.
NIST SP 800-86 describes collection, examination, analysis, and reporting in an incident-response context. RFC 3227, Guidelines for Evidence Collection and Archiving, published in 2002, supplies historical guidance on collection discipline and archiving. Both are process foundations; neither substitutes for current source-specific collection behavior or organizational handling requirements.
Give derivatives their own identities
An extracted file, database snapshot, converted image, normalized log, screenshot, and redacted report are different objects. Record each derivative's parent, creation method, parameters, time, responsible reference, and hash where applicable. Preserve the original acquisition output independently. A derivative's changed bytes are expected when transformation occurred; the record should explain the relationship.
For a service export, keep query parameters, selected accounts, time window, page boundaries or pagination details, permissions, and service-generated manifest. A download's hash supports subsequent byte comparisons, but it does not prove the export included everything in the tenant.
Use a minimum provenance row
| Field | Purpose |
|---|---|
| Object and parent identifiers | Trace a displayed result back through derivations. |
| Source and scope | Explain which material was eligible for collection. |
| Method and version | Identify the operation that produced this object. |
| Time and actor reference | Place handling in a documented sequence. |
| Size, digest, and algorithm | Compare the same defined bytes across transfers. |
| Exceptions and exclusions | Keep incompleteness visible during review. |
Connect the report to the record
For each material claim, cite the object identifier and precise supporting record, field, or location. Retain the extraction or query used to generate a table. If manual editing was necessary, preserve a description or reproducible transformation. A polished chart should not become the only surviving representation of its source.
Keep custody and content checks related but distinct. A digest comparison concerns defined bytes. A custody record concerns handling and access. A truthful source-history claim may require both, together with information about what preceded acquisition.
Resolve routine provenance failures early
Common problems include reused filenames, undocumented screenshots, exports without query boundaries, time values with no offset, and working copies confused with originals. Resolve the identifier or relationship while the source is available. If resolution is impossible, preserve the ambiguity and limit conclusions that depend on it.