GenAI content lacking explicit and implicit labels

Add both a visible AI-generated label and implicit metadata naming the provider and a content ID to synthetic content before the file is saved, returned, or exported.

A labeling step between the generator call and every save, return, or download path does two things: it adds an explicit label users can perceive (text drawn onto images or video frames, an audible notice in audio, a label beside generated text in the UI), and it writes implicit metadata into the file (a PNG text chunk, XMP block, or C2PA manifest) carrying the AI-generated attribute, the provider's name or code, and a unique content ID. Export and download routes go through the same step so files leave with both labels; a digital watermark can complement the metadata.

Where it goes: 9 AI output handling, 1 application source code.

What reviewers look for: in the module that writes generated media, both a visible label (ImageDraw text, ffmpeg drawtext=, a label component) and a metadata write (PngInfo with an AIGC field, XMP, c2pa) on every path to save or return, including export and download.

b64 = client.images.generate(model='gpt-image-1', prompt=prompt).data[0].b64_json
img = Image.open(io.BytesIO(base64.b64decode(b64)))
img.save(path)

b64 = client.images.generate(model='gpt-image-1', prompt=prompt).data[0].b64_json
img = Image.open(io.BytesIO(base64.b64decode(b64))).convert('RGB')
font = ImageFont.truetype('NotoSansCJK-Regular.ttc', 24)
ImageDraw.Draw(img).text((12, img.height - 36), 'AI生成 / AI-generated', fill=(255, 255, 255), font=font)
meta = PngInfo()
# implicit label: AI-generated attribute, provider name or code, content reference (Art. 5);
# take the exact metadata field names from the national standard GB 45438-2025 (not encoded here)
meta.add_text('ai_generated_label', json.dumps({'ai_generated': True, 'provider': PROVIDER_CODE,
                                                'content_id': str(uuid.uuid4())}))
img.save(path, format='PNG', pnginfo=meta)

Engineering guidance, not legal advice. Each provision below may add its own details (a cadence, a deadline, a required notice element): open it for those.