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. 17 shown for “Martin Kammerer” — 45 records examined, 25 dropped by the rights gate.
Archives queried 2026-08-28 20:47 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Wheellock Sporting Rifle
Martin Kammerer · dated 1658
Worthenocrinus paterus Kammer & Ausich
Artist not stated in the record
Wheellock Rifle with Spanner, Shot Extracting Tool, and Shooting Patch
Martin Kammerer · ca. 1665
Hypselocrinus vansanti Kammer & Ausich
Artist not stated in the record
Figure of ibex
Artist not stated in the record · ca. 5th century BCE
Hylodecrinus robustus Kammer & Ausich
Artist not stated in the record
Jeweled Snuffbox
Artist not stated in the record · ca. 1765
Cyathocrinites deroseri Kammer & Gahn, 2003
Artist not stated in the record
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
Actinocrinites probolos Ausich & Kammer
Artist not stated in the record
Thesium subsucculentum (Kämmer) J.C. Manning & F. Forest
Artist not stated in the record · 19 Jul 2014
Botryococcus braunii
Artist not stated in the record · -- Aug ----
Basilodon woodwardi Kammerer et al., 2011
Artist not stated in the record · Mar 1964
Calamintha thymifolia (Scop.) Rchb.
Artist not stated in the record · Transcribed d/m/y: /8/83
Veronica fruticulosa L.
Artist not stated in the record · 17 Jul 1882
Sphaeralcea subhastata subsp. martii (Cockerell) Kearney
Artist not stated in the record · 1915
Scabiosa wulfenii Roem. & Schult.
Artist not stated in the record · 30 Jun 1887
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. 5 matched · 5 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.5 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 38906 matched · 40 examined · 25 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.12 shown
These figures describe the pass run at 2026-08-28 20:47 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.