Imagine a print shop. A designer reviews a brochure assembled with AI assistance. After upload, a file with the same name may not contain the reviewed bytes. This is a hypothetical handoff exercise, not a real customer incident.

Freeze the exported file. Record its version, size, algorithm and full digest. The receiver recomputes the digest over the actual file. A filename or screenshot is not a byte comparison. Cloud storage supports integrity checks, but do not assume every tool enables them automatically.

A matching digest advances to content review, not directly to printing. A mismatch stops the handoff and preserves both files. Without a trusted expected digest, mark the result unverified. Looking identical is not evidence.

A digest is not an identity badge, a guarantee of correct content, or permission to act. Replacing both the file and expected digest can still yield a match. Keep expected values in an authenticated, controlled handoff channel.

Conversion creates a new object. Compression, re-export or metadata edits can change bytes. Keep separate original and derivative digests, linked by a conversion record. The integration team must define the exact layer being checked.

Rehearse with synthetic files. An unchanged copy passes; a one-byte change stops. A permitted conversion gets a new record. No trusted expected value means unverified. This proposed test has not been run on a customer system. Separate byte verification from content approval.