WhatsApp voice messages: handling paths and file integrity (dataset)

Test voice messages recorded with WhatsApp on an Android phone (Huawei P10 lite, Android 8.0, WhatsApp 2.26.42) and an iPhone 16 (iOS 27.0.1, WhatsApp 2.26.41), and the copies obtained after nine handling paths: direct sending, forwarding chain, chat export from both platforms, WhatsApp Web download, iOS "Save to Files", two re-encoding controls, and a media reuse test. Includes three-level hashes (file, compressed packets, decoded PCM), Ogg/Opus structure, test register, custody logs and the analysis scripts. All recordings contain only the author's voice. Chat export archives and iPhone backup indexes are not included to protect personal data. See README.md.