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2026/11/9 18:08 (UTC+8) · Industry News · ByteDance ⚠️ Portraits uploaded to the Seedance asset library fail with a “copyright restrictions” message, but the blocker is usually neither copyright nor branding — it is that the face has no traceable source. What the library checks is who owns the face and who authorized it, not whether a face is present. Seedance 2.x accepts only three sources: preset virtual portraits, raw outputs generated by Seedream 5.0 text-to-image or Seedance in the same account within 30 days, and real-person portraits verified and authorized by that person. An AI-generated face can only take the second path, which means keeping a parseable record that the file is model output. Screenshots, WeChat transfers, image-host links and “save as” from an image viewer all re-encode the file and strip both the C2PA metadata and the SynthID watermark. Once that credential is gone, the same face stops being a virtual portrait and becomes an unverified real person — which is exactly what InputImageSensitiveContentDetected.PolicyViolation reports. Upload the original file:
  • take the raw bytes from the generator, base64-decode and write them straight to disk
  • move files with AirDrop, a cable or a cloud drive’s original-file download — not WeChat, where even “original” strips metadata
  • do not open, edit or convert the file before upload
Two more caveats: the asset library is meant for non-portrait material, so portraits belong in the virtual portrait library or the real-person portrait library; and passing review only means the file is technically usable — it grants no rights to any third-party trademark in the frame.
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