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Collect provider samples from Higgsfield, Runway and Dreamina plus Google Photos, Gemini, Grok and YouTube re-encodes into data/captures/2026-09 with a hash-checked manifest, and use them to fix attribution and false positives: - Attribute aggregator outputs: Higgsfield job metadata, Dreamina's re-signed manifests, Runway's own C2PA signer, TC260 video producers. - Veto any visible video mark when a valid C2PA claim names another vendor (a Gemini Omni clip read as Sora on steam), and gate Kling and Hailuo matches on edge, anchor and white-label evidence. - Veto the Gemini sparkle when trusted provenance names another vendor. - Report SynthID as present for Google Photos AI edits: Google's checker found it on all four measured edits, though manifests record no action. - Add Vidu video and Wan image marks, TC260 audio placements, and record the AIGC key in metadata records. - Document the research sweep, the Dreamina badge decision, and verified Google statements on SynthID in Photos. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>