What ByteDance has done with Seedance 2.0 is shift copyright compliance from a legal department problem to an engineering one. The model's portrait and copyright safety standards are embedded across the full generation process [1] — meaning the constraint is structural, not advisory. Most competing labs have relied on DMCA takedown pipelines and terms-of-service prohibitions to manage infringement exposure; those tools operate after content is created and distributed. ByteDance, having already paid the reputational cost of an early release that circulated copyrighted material widely enough to force a [mid-March global…