Test file
WAV · Deterministic container test
The WAV fixture contains C2PA, ID3, XMP, LIST/INFO and broadcast chunks around eight PCM samples.
- Evidence scope
- Eight unsigned 8-bit PCM samples
- SHA-256
dc614b88e2b9…
MP3 / WAV / lossless audio cleanup
Keep the recording. Remove the details attached to it.
Drop in an MP3 or WAV to see titles, names, comments, artwork, broadcast notes and supported provenance data before making a separate clean copy.
CONTEXT / EVIDENCE
The sound and its descriptive fields are separate
An MP3 can carry an ID3 tag with the track title, artist, album, comments, artwork, software details and other fields. WAV is a RIFF container: names and comments can live in LIST/INFO, while broadcast workflows may add bext, iXML, axml or cart chunks. Either format may also contain supported C2PA data.
ClearTags creates another file and omits only the supported sections selected for cleanup. It does not decode and record the sound again on these MP3 and WAV paths. Afterward, it reinspects the copy and compares the audio-payload hash where the container can be compared reliably.
AUDIO CONTAINER / CLEANUP RESULT
MP3 ID3 and WAV RIFF metadata are stored differently
ClearTags reads the finished audio file before changing it. MP3 normally keeps descriptive fields in an ID3 tag, while WAV can spread them across several RIFF chunks.
ClearTags verifies the media-payload hash after supported lossless MP3 and WAV cleanup. That comparison covers the audio bytes, not the entire container or every proprietary chunk.
LAB FIXTURES / WAV + MP3
The audio-byte check is reproducible
The repository contains two deterministic test containers. They run through the same production cleanup function as a file selected in the browser. They prove these format paths, not compatibility with every recorder, editor or tagging application.
Test file
MP3 · Deterministic container test
The MP3 fixture places ordinary text and a C2PA-labelled object in ID3v2 ahead of four valid MPEG audio frames.
- Evidence scope
- Four MPEG audio frames after the ID3v2 tag
- SHA-256
4d007ff2a70d…
Verified result
Cleanup removed every injected metadata section. The WAV PCM samples and MP3 MPEG frames matched their published media-payload SHA-256 values byte for byte.
ClearTags Lab documents each fixture's scope and publishes its complete hashes.
What the audio check keeps separate
C2PA · EXIF · XMP · CONTAINERNames, notes and artwork
Track names, creator fields, comments, cover art and software details can travel with the audio even when they are not visible in the player.
Production notes
A WAV can carry description, originator, project timing and other broadcast fields in dedicated RIFF chunks.
PCM samples or MPEG frames
On the supported lossless paths, cleanup changes the container metadata rather than decoding and recording the sound again.
Make a clean audio copy
WORKFLOW / LOCAL COPY- 01
Choose the finished file
Use the exact MP3 or WAV intended for upload, delivery or publishing.
- 02
Read the attached details
Check ordinary tags, broadcast notes and C2PA separately before changing the file.
- 03
Remove supported sections
Use automatic cleanup or choose the whole metadata sections the format supports.
- 04
Listen and verify
Preview the derivative, review the second inspection and download it without changing the original.