Ask what changed
An owned media workflow can change the description attached to a picture, transform the sample values, or do both. The output showing a familiar colour label does not identify which operation happened. Keep the processing record and source interpretation alongside the final metadata report.
A reliable source record might justify correcting an omitted or wrong label. A destination requiring a different representation may instead need a real transformation. Those cases can produce similar-looking metadata while requiring different preparation.
Do not guess an input interpretation from resolution or from a viewer's preference for more saturation. If the evidence is missing, preserve the uncertainty and source. A speculative tag can influence every later colour-aware stage.
Compare the right candidates
Create a short candidate from material you own and include neutral tones, faces and highlight detail. Change one justified assumption at a time while keeping the viewing route fixed. Record whether the candidate is a metadata correction or a conversion.
If a metadata correction restores the known source description, document why that description is trustworthy. If a conversion is required, record input and output assumptions and inspect the exported result. Neither a successful command nor a screenshot proves mastering accuracy.
VideoColorSpace by Mozilla Contributors documents distinct colour-description properties under CC-BY-SA 2.5 or later. The audit procedure here is original guidance. Keep the candidate and source identifiers so another reviewer can assess the actual decision rather than trusting a final filename containing corrected-colour.
Questions answered
Can a label change be appropriate?
Yes, when evidence establishes that the stored samples were described incorrectly.
Does a BT.709 output label prove an HDR-to-SDR transformation?
No. Check the actual processing and sample interpretation.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.