Fire2 · File integrity
A matching MD5 proves identity—not quality
Checksums are excellent evidence for one narrow question: are these bytes identical to the bytes that were checked before delivery? Trouble starts when that answer is treated as proof of audio quality, correct metadata, or the right master version.
- Published
- Reading time
- 5 minutes
What a match proves
If the receiver calculates the same digest from the received file, the file is byte-for-byte identical to the file represented by the original checksum. This is useful after uploads, downloads, copies, archive retrieval, and handoffs between systems.
MD5 remains practical for accidental-change detection and delivery manifests. It should not be used as a security guarantee against deliberate manipulation.
What it does not prove
A checksum cannot hear clipping, confirm loudness targets, validate metadata intent, or decide whether the correct master was selected. A perfectly matching wrong file is still the wrong file.
Keep integrity evidence alongside analysis and version evidence. Each answers a different question.
When a checksum does not match
Do not overwrite the manifest or regenerate a new checksum merely to make the warning disappear. Preserve both files, compare size and timestamps, confirm the expected version, and calculate fresh digests from known locations.
- Was the file re-rendered, tagged, normalized, or converted after the manifest was made?
- Did a cloud service or archive workflow replace the file?
- Is the receiver checking the same version and extension?
- Can the sender reproduce the original digest from the retained delivery copy?
A defensible handoff
Name the checksum algorithm, keep the manifest machine-readable, and include a short verification instruction. Record exceptions rather than hiding them. The goal is not a green badge; it is a traceable answer when somebody asks whether the file changed.
Next step
See checksum reporting in Fire2