Independent measurement of the open web

Studies

Published measurements

Every study is free to read, free to cite and free to reproduce. Method and raw data are published with each one.

Content provenance on the open web

9 August 2026 · Report 01 · Baseline. images from a stratified Tranco top-1M sample, measured as actually served. carried a provenance manifest — %, 95% CI % (cluster bootstrap). Measured seven days after the EU AI Act’s Article 50(2) became applicable.

Content provenance — the deadline re-measurement

Scheduled 2 December 2026. Same instrument, same frame, on the date the AI Act transition period ends. A before-and-after that cannot be reconstructed later by anyone who did not measure in 2026.