OpenTwo archives, queried live.
Every record below comes from The Met or Smithsonian Open Access and was filtered on that archive’s own rights field before it reached this page. 12 shown for “Aert van der Neer” — 64 records examined, 44 dropped by the rights gate.
Archives queried 2026-08-26 19:57 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Sports on a Frozen River
Aert van der Neer · ca. 1660
The Farrier
Aert van der Neer · early or mid-1650s
Landscape at Sunset
Aert van der Neer · 1650s
Ice skaters on the Amstel in Amsterdam
Hans Bol · 1589
Lectern in the Form of an Eagle
Jehan Aert van Tricht · ca. 1500
The Reader
Eglon van der Neer
Landscape, after a sketch by Eglon van der Neer
Charles Jacque · 1862
A Green Woodpecker and a Sparrow in a Tree
Aert Schouman · mid-17th–late 17th century
Virgin and Child in a Niche
Jan van Eyck · ca. 1440–50
The Card Party
Caspar Netscher · ca. 1665
Candlestick
Jehan Aert van Tricht · ca. 1500
Winter Scene
Jan van de Cappelle
Where these records came from.
Two archives are wired, and only two. Each one is filtered on its own rights field — never on a title match, and never on the presence of an image file.
- The Met Collection API (Open Access)Rights field:
isPublicDomain. 127 matched · 24 examined · 4 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.12 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 37758 matched · 40 examined · 40 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.0 shown
These figures describe the pass run at 2026-08-26 19:57 UTC, during this request. A completed pass is kept for 24 hours and replayed for an identical search, which is what keeps repeated queries inside Smithsonian’s 30-requests-per-hour allowance. A pass in which either archive failed to answer is never kept — an outage must not be replayed as though it were a finding about the catalogue.
Wikimedia Commons and the Library of Congress are deliberately not wired. Wikimedia was confirmed, on a live query, to return CC-BY material inside the same result set as genuine public domain works, and filtering it safely has not been designed yet. loc.gov was blocked by bot detection during the source evaluation, so its rights vocabulary has never been observed — and nothing here is built on a field nobody has read.
An image file is a rights claim. It never travels without its field.