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. 14 shown for “2c Post Rider and Horse card plate proof” — 42 records examined, 0 dropped by the rights gate.
Archives queried 2026-09-01 01:18 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Horse and rider startled by a snake
Artist not stated in the record · early 16th century
2c Post Rider and Horse card plate proof
Artist not stated in the record · 1893
Don Gaspar de Guzmán (1587–1645), Count-Duke of Olivares
Juan Bautista Martínez del Mazo · ca. 1636 or later
2c brown Post Rider & Horse plate proof single
National Bank Note Company · 1869
2c brown Post Rider & Horse plate proof single
National Bank Note Company · 1869
2c brown Post Rider & Horse re-issue single
National Bank Note Company · 1875
2c Post Office Department card plate proof
Artist not stated in the record · 1879-1894
2c Parcel Post Postage Due plate proof
Bureau of Engraving and Printing
2c City Carrier plate proof
Bureau of Engraving and Printing
2c Post Rider and Horse G Grill single
National Bank Note Company · 1869
2c Post Office Department card plate proof
Artist not stated in the record · 1893
2c George Rogers Clark frame plate proof
Bureau of Engraving and Printing · February 7, 1929
2c "Greatest Mother" plate proof (absent the red cross)
Bureau of Engraving and Printing · 1930
2c Stephen Decatur and Thomas MacDonough plate proof
Bureau of Engraving and Printing
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. 2 matched · 2 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.2 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 1537593 matched · 40 examined · 0 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 2026-09-01 01:18 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.