AI Data Annotation Needed ( Proof records on data annotation/portfolios considered )-if you can't prove hands-on experience in data annotation, it'll be rejected

I need fully annotated data files that can slide straight into a machine-learning training pipeline—no extra cleaning or reformatting on my side. The exact modality (images, text, or audio) will be confirmed once we agree on the first batch, so feel free to indicate the domain in which you work best. Consistency, adherence to clear labeling guidelines, and reliable turnaround times are essential. Along with the finished annotations, share a brief sample or portfolio that demonstrates your previous annotation quality; seeing how you structure labels, handle edge cases, and document your process helps me gauge fit quickly. Deliverables are accepted when the files import without errors, follow the agreed schema or JSON/XML/CSV spec, and pass a random spot-check for accuracy.