Cookies & trackers
This page describes the cookies and similar technologies used by opusheritage.com, their purpose, their lifetime and how to exercise your choices.
Your choices
On your first visit, a banner lets you accept or refuse non-essential trackers, category by category. Your choices are kept for 13 months and you can change your mind at any time.
Categories
- Essential (always on) — Site operation: remembering your consent choices, display variants, administration console session.
- Exempt audience measurement (always on) — Strictly anonymous traffic statistics, without any cookie or persistent identifier (CNIL exemption).
- Detailed analytics (off by default) — An anonymous identifier to understand visit journeys across sessions. Enabled only if you accept them.
- Session replay (off by default) — Anonymously replays navigation to improve usability, with input masking. Enabled only if you accept it.
- Marketing — Reserved category: no marketing tracker is used to date.
Tracker details
| Name | Type | Purpose | Lifetime | Condition |
|---|---|---|---|---|
opus.heritage.consent | cookie | Remembers your consent choices | 13 months | Essential |
opus.heritage.aid | cookie | Anonymous measurement identifier | 13 months | “Analytics” consent |
opus.heritage.sid | localStorage | Measurement session identifier | Session | “Analytics” consent |
opus.heritage.did | sessionStorage | Device identifier | Session | “Analytics” consent |
rrweb | script (jsDelivr) | Session replay, inputs masked | Recordings: 30 to 90 days | “Replay” consent |
opus_ab | cookie | A/B test variants (no personal identifier) | 180 days | Essential |
opus.rm | httpOnly cookie | Keeps you signed in between visits (opaque signed account identifier, no personal data) | 180 days | Essential (signed-in visitors) |
opus_admin | httpOnly cookie | Administration console session | 7 days | Essential (administrators only) |
Cookie-less audience measurement
Our traffic statistics rely on a non-reversible daily technical identifier, without any cookie (see the privacy policy). The site also uses Vercel Analytics, our host’s aggregated audience measurement, which likewise works without cookies or persistent identifiers.
Consent panel version: 2026-06-14