Two 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 “Christian Friedrich Boetius” — 24 records examined, 2 dropped by the rights gate.
Archives queried 2026-09-02 14:35 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.Smithsonian Open Access: HTTP 429 from api.si.edu. Results from the remaining archive are shown unchanged — nothing is substituted for a source that did not answer.

Night scene in a cave with an old woman holding burning coals in a pot, a boy blowing into the fire at left
Christian Friedrich Boetius · ca. 1750–57

Two Men Contemplating the Moon
Caspar David Friedrich · ca. 1825–30

Joseph Fröhlich
Meissen Manufactory · 1738

Joseph Fröhlich
Meissen Manufactory · 1736

Two Men before a Waterfall at Sunset
Johan Christian Dahl · 1823

Mother and Child by the Sea
Johan Christian Dahl · 1830

Foot-Combat Armor of Prince-Elector Christian I of Saxony (reigned 1586–91)
Anton Peffenhauser · 1591

Plaque
Workshop of Charles Fromery · ca. 1730

An Eruption of Vesuvius
Johan Christian Dahl · 1824

The Banishment of Hagar
Johann Friedrich Overbeck · 1839–41

Copenhagen Harbor by Moonlight
Johan Christian Dahl · 1846

Snuffbox
Meissen Manufactory · ca. 1730–35
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. 198 matched · 24 examined · 2 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. HTTP 429 from api.si.edu. No records from this archive are shown for this query.Unavailable
These figures describe the pass run at 2026-09-02 14:35 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.