Balcony Witness Phone Afteruse Receipt Mechanism
The mechanism separates three objects that must never collapse:
source phone
-> first-custody copy: public derivative | sealed master
-> named later-reader inferenceThe source phone fixes the 37-second acoustic window. First custody fixes copy identity. The afteruse review fixes what a named later reader may infer, which claimant remains exposed, which proof bridge is required, and which future route cost persists.
The supported claim is narrower than the possible uses: distress breathing and a continuing-applause instruction coexisted before cutoff. Any claim about identity, consent, safety, survival, oxygen settlement, full chronology, voice/likeness permission, memorial permission, or universal admissibility requires additional evidence.