Dataset — The frozen upload handle: TikTok's video watermark as a temporal anchor for forensic account attribution and dating

Supporting data for the article "The frozen upload handle: TikTok's video watermark as a temporal anchor for forensic account attribution and dating" (Forensic Science International: Digital Investigation). Contents: Public-corpus manifest — 593 exhibits from 9 TikTok accounts: public identifiers and SHA-256 digests only; no platform video content is redistributed. Two controlled single-variable experiments on the author's own accounts — watermarked and clean videos, frames, SHA-256/512 digests, RFC 3161 timestamps and OpenTimestamps receipts. Independent third-party time anchoring via archive.today seals. Redacted extracts of the official TikTok data exports. Integrity: unzip and run sha256sum -c SHA256SUMS.txt. The full personal-data exports are not included (they contain personal data). See README.md.