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To support an authenticity claim, preserve the camera original or earliest received file, edit a separate working copy, keep a dated and readable record of significant operations, retain hashes and transfer notes when integrity matters, and verify any provenance credentials attached at export. This evidence can show where a file came from, what happened to it, and whether a retained copy changed. It cannot, by itself, prove that the photographed scene is true or that an event occurred exactly as depicted.
What workflow documentation can establish
“Authentic” can mean several different things. Decide which question your records are meant to answer before choosing how much detail to capture.
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| Term | What it addresses | What it does not establish |
|---|---|---|
| Provenance | Where an image came from and how it was created, edited, transferred, or exported. | That the depicted event happened as shown. |
| Integrity | Whether a particular file remains complete and unchanged since a known point, often checked with a cryptographic hash. | That the camera captured a truthful scene, or that an earlier file was itself genuine. |
| Image authentication | A forensic assessment of whether imagery is an accurate representation under defined criteria. | A creator’s workflow log alone; examination may require specialist methods and context. |
| Content Credentials (C2PA) | Signed provenance claims and information about source files, ingredients, and changes. | A universal certification that the scene or event is real. |
The distinction matters in every setting. A portfolio client may mainly need a transparent description of retouching. A newsroom may need an auditable chain from the photographer’s card to publication. An insurer, regulator, or court may impose its own evidence, retention, and access rules. Your documentation supports those processes; it does not replace them.
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Start with the earliest file you received or captured: the camera raw, original JPEG, video frame, or an incoming file supplied by another person. Do not overwrite it, rename it in a way that loses its original identity, or open it in a program that silently rewrites metadata and then treat the result as the source.
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SWGDE’s SWGDE Image Processing Guidelines states the core rule plainly: “The original image is preserved and processes are performed on a working copy.” That is forensic guidance, not a requirement that every personal photograph meet a forensic standard, but it is a sound recordkeeping principle.
- Ingest without alteration. Copy the file from the card, device, download, or handoff location using a method approved by your organization. Record the source, receipt date and time, time zone, photographer or operator, device or camera if known, and transfer method.
- Give the source a stable identity. Keep the original filename in your inventory. If you assign an internal identifier, record the relationship rather than replacing the source name.
- Protect the source. Store it separately from active project files. Use read-only media, write protection, or access controls appropriate to your environment. If policy permits, maintain more than one backup without modifying the preserved copy.
- Record any unavoidable conversion. If a card image is converted, decoded, or copied through software that can change metadata, retain the initial file and describe the conversion and tool used.
Preserving the first file gives later reviewers a fixed reference. It also prevents a common failure: trying to reconstruct what existed before an edit after the only copy has already been saved over.
Make a working copy and keep non-destructive information
Create a separate working copy for every operation. Keep the source, the editable project, and the delivered export as distinct records. A layered file, catalog entry, sidecar, or other non-destructive edit state can show how adjustments were applied, but it is not a substitute for retaining the source.
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Save the working project and its sidecars when the application supports them and when they are relevant to the claim. If an application stores edits only in a database, export or preserve the applicable catalog record according to the software’s documented method. Note when a project was flattened, merged, or converted, because those actions can remove information that would otherwise help another editor reproduce the result.
Build an edit log another trained person can follow
A useful log lets a similarly trained reviewer understand and, where practical, repeat the work. The following fields are a practical checklist synthesized from image-processing guidance, not a universal legal form.
| Log field | What to record | Why it matters |
|---|---|---|
| Operator | Name or controlled identifier of the person who performed the action. | Connects decisions to an accountable actor. |
| Date and time | Start and finish times, with time zone or a stated clock standard. | Places edits and handoffs in sequence. |
| Input identity | Original and working filenames, internal IDs, and relevant hashes. | Shows which file was actually edited. |
| Purpose | The assignment or reason for processing. | Explains why an operation was made. |
| Software | Application name, edition where relevant, and version. | Helps a reviewer understand available tools and reproduce settings. |
| Operations | Meaningful edits, their sequence, and important settings or ranges. | Describes how appearance or interpretation changed. |
| Output | Export filename, date, format, dimensions, compression, and color-profile setting when relevant. | Defines exactly what was delivered. |
| Handoffs | Who transferred or received the file, when, by what method, and where it was stored. | Documents custody and possible points of change. |
Use a human-readable record such as a controlled spreadsheet, text entry, database record, or project note. A log that only says “edited” is not repeatable. Record the operation in terms a reviewer can understand: “cropped to remove empty margin,” “lifted shadows globally,” “removed a dust spot,” or “composited a separately captured sky.” Include the reason when it affects interpretation.
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Describe edits that affect appearance or interpretation
At minimum, note operations that could change what a viewer concludes from the picture:
- Crops, rotations, perspective corrections, and reframing.
- Local exposure, contrast, color, sharpening, blur, or tonal adjustments.
- Retouching, object removal, cleanup, or additions.
- Compositing, panoramas, focus stacks, high-dynamic-range merges, and other combinations of frames.
- Generative fills, replacements, or other machine-created pixels.
- Conversions that materially affect color, detail, or dynamic range.
Routine technical adjustments can be recorded briefly when they do not alter the intended interpretation, but some assignments require every adjustment. For example, a publication may require a complete account of color and tonal changes, while a personal print log may only need a note that a raw file was developed and exported. When in doubt, err toward a description that allows a reviewer to distinguish capture data from later choices.
Do not hide a material change behind a vague label such as “enhanced.” State what was changed and whether pixels were removed, added, synthesized, or rearranged. If no edits were made beyond technical processing, say exactly that rather than calling the file “unaltered.”
Capture export and conversion details
The final image can differ from the working file because of resizing, sharpening, color management, compression, metadata stripping, or platform conversion. Record each export that may be delivered or relied upon.
- Export filename and the working file from which it was created.
- Export date and time, including time zone.
- File format and, where applicable, bit depth and transparency.
- Pixel dimensions and any resizing method.
- Compression choice or quality setting when the format exposes one.
- Color space or profile, plus any conversion from the working space.
- Whether metadata was retained, removed, or rewritten.
- Any upload, messaging, content-management, or social platform that recompressed or transformed the file.
Keep the delivered export separately from the preserved source. If a service creates a derivative, retain the pre-upload file and note the service, upload time, and resulting filename or URL in the custody record. A platform copy may be useful for publication history, but it should not silently replace your controlled master.
Use hashes to verify file integrity
A cryptographic hash produces a digest for a particular sequence of bytes. If you hash a retained file again and the digest matches, you have evidence that the bytes are the same as when the first digest was recorded. NIST’s guidance on preserving digital evidence recommends storing the hash separately in a secure location.
- Choose an organization-approved hash algorithm and tool.
- Hash the original, working file, and important exports at the point your policy requires.
- Record the algorithm, complete digest, filename or identifier, date and time, and the tool or system used.
- Store the hash record separately from the file, with access controls that prevent an unauthorized person from changing both records.
- Recalculate after a transfer or at review time and compare the result with the controlled record.
A matching hash does not prove that an image is truthful. SWGDE’s Best Practices for Image Authentication explains: “For example, the use of a hash function can verify that a copy of a digital image file is identical to the file from which it was copied, but it cannot demonstrate the veracity of the scene depicted in the image.” A hash also cannot tell you whether the file was manipulated before the first hash was made.
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Document custody, access, and backups
Integrity evidence is stronger when a reviewer can see how the file moved and who could access it. Record transfers between people, devices, storage systems, and services. For each handoff, note the sender, recipient, date and time, method, source and destination identifiers, and whether a conversion or metadata change was expected.
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Add signed provenance with Content Credentials when supported
C2PA Content Credentials are a technical mechanism for attaching signed provenance claims. A manifest can describe a source asset, ingredients used to create a derived asset, and declared actions or changes. The signature helps detect later tampering with the credential data, while the claims still depend on what the creator and software recorded.
Support varies by application, version, export path, and receiving service. Adobe documents that Lightroom can include editing history, but the feature must be enabled for each document. Camera Raw records information that Content Credentials can reference at export. Interface labels and retention behavior can change, so check the current version of the application you are using.
- Enable Content Credentials before exporting the document, not after the file has already been delivered.
- Confirm which source and edit information the application will include and whether identity or device details are optional.
- Export through a path that supports the credentials.
- Inspect the delivered asset with a compatible verifier and confirm that credentials are present and readable.
- Retain the original, working project, edit log, hash records, and custody notes even when credentials are embedded.
Credentials may be stripped by resizing, screenshots, messaging systems, or other conversions. Their absence does not prove that an image was altered, and their presence does not certify that the depicted event occurred. Treat them as an additional provenance layer, not as a replacement for your underlying records.
An end-to-end documentation procedure
Use this sequence for a new assignment, adapting the retention and access controls to your organization’s rules.
- Identify the use case. Write down whether the image is for a portfolio, newsroom, commercial delivery, insurance matter, regulatory submission, or potential legal evidence.
- Receive or capture the source. Record the photographer or operator, device if known, source location, receipt details, and transfer method.
- Preserve the first file. Store it separately and protect it from routine editing.
- Create a working copy. Link its identifier to the source without overwriting or renaming away the original identity.
- Start the log. Enter the operator, time zone, purpose, software and version, and input filename before making changes.
- Edit transparently. Record crops, adjustments, retouching, compositing, removals, additions, generative operations, and any technical processing required by the assignment.
- Save reproducible material. Retain layered or non-destructive project data and sidecars where available and relevant.
- Export deliberately. Record format, dimensions, compression, profile, metadata treatment, and export time for every important deliverable.
- Hash controlled files. Record the algorithm, digest, timestamp, and identifier in a separate protected record when integrity verification is important.
- Apply provenance credentials. If the editor supports C2PA, enable it before export and verify the delivered file.
- Log every handoff. Note transfers, uploads, conversions, storage locations, and recipients.
- Review the package. Confirm that a reviewer can connect the source, working copy, edits, export, hashes, and custody notes without guessing.
Adjust the level of rigor to the intended context
| Context | Usually useful | Questions to settle locally |
|---|---|---|
| Personal portfolio | Original retained, concise edit description, working file, and export details. | How much retouching must be disclosed to clients or viewers? |
| Newsroom or documentary work | Original and working copy separation, complete edit log, source and transfer notes, controlled exports, and correction history. | Which editorial standards govern crops, tonal changes, composites, and metadata? |
| Commercial delivery | Project files, approval history, export specifications, and a record of client handoffs. | Which version is the approved master and how long must it be retained? |
| Insurance or dispute | Protected original, hashes, custody notes, access records, reproducible edits, and a clearly identified delivered file. | What retention, privacy, and expert-review requirements apply? |
| Potential court evidence | All applicable organizational controls, preserved originals, separate hash records, detailed custody, and expert guidance. | Follow the governing jurisdiction’s evidence rules rather than assuming a creator log is sufficient. |
No workflow guarantees that a tribunal, client, publisher, or investigator will accept an image as authentic. Acceptance depends on the claim, the surrounding evidence, the applicable rules, and the credibility of the records.
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Common failures and how to correct them
The only copy was edited
Stop further changes, make a forensic or policy-approved copy if required, and document what happened as soon as possible. Do not label the edited file as the original. If an earlier backup, card, message attachment, or recipient copy exists, preserve it and record how it was obtained.
The log says only “edited”
Reconstruct the sequence from application history, project files, sidecars, timestamps, and operator notes. Mark reconstructed entries as such and identify uncertainty. A late, candid reconstruction is more useful than an invented precise history.
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Retain the pre-conversion export, note the software or platform that removed the information, and verify whether a new export path can preserve it. Do not infer that missing metadata means the pixels are false.
A hash was recorded but stored with the image
Move or copy the digest into a separately controlled record and document when that separation occurred. Future checks should compare the file against the protected record, not against a digest kept in the same unprotected folder.
A credential is present, so the team discarded other records
Restore the original, working file, edit log, and custody documentation if they still exist. A signed manifest describes recorded provenance; it does not replace the underlying evidence or establish scene truth.
How to compare documentation workflows
When choosing software or an internal process, compare the workflow rather than a brand name. A strong option should be assessed on these axes:
- Original preservation: Can the process keep the source separate and protected?
- Edit completeness: Does it capture meaningful operations, settings, and operator identity?
- Reproducibility: Can another trained person review the record and repeat the result?
- Signed provenance: Does it support C2PA, and do credentials survive the actual export and delivery path?
- Integrity controls: Can hashes, backups, permissions, and access events be managed under your policy?
- Context fit: Does the process meet the standards, retention period, privacy obligations, and review expectations of the intended use?
Test the complete path with a disposable file: ingest, edit, export, upload, download, and verify. Record where metadata, project information, or credentials disappear. Then set the documented workflow around the real path, not around a feature that exists only inside the editor.
How to describe the resulting authenticity claim
Be precise about what your package supports. You may be able to state that a delivered file matches the hash recorded on a particular date, that it derives from a preserved source through listed edits, or that signed credentials accompany the export. Do not turn those statements into “the scene is proven genuine” unless an appropriate examination and evidence support that conclusion.
A good claim identifies the file, the time boundary, the documented operations, and the limits. For example, explain that the record documents the image’s source and processing history while making clear that it does not independently establish the truth of the depicted event. That wording keeps provenance, integrity, and authentication in their proper roles.
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