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. 24 shown for “Receipt for mail to be delivered on March 24, 1970” — 64 records examined, 4 dropped by the rights gate.
Archives queried 2026-08-31 21:30 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Study for "A Sunday on La Grande Jatte"
Georges Seurat · 1884
Receipt for mail to be delivered on March 24, 1970
Artist not stated in the record · c. 1970
Federico Gonzaga (1500–1540)
Francesco Francia · 1510
Receipt for mail to be delivered on March 24
Artist not stated in the record · c. 1970
Young Lady in 1866
Edouard Manet · 1866
Albany Letter Express definitive handstamp delivered March 24, 1970
Artist not stated in the record · c. 1970
Blind Orion Searching for the Rising Sun
Nicolas Poussin · 1658
Postal rates and regulations form letter
Artist not stated in the record · 1838
Aegina Visited by Jupiter
Jean-Baptiste Greuze · ca. 1767–69
Post rider receipt
Artist not stated in the record · March 19, 1687
Joan of Arc
Jules Bastien-Lepage · 1879
Bill of sale for Hannah and her children, Clarinda and Stephen
Artist not stated in the record · March 3, 1800
Philip IV (1605–1665), King of Spain
Velázquez (Diego Rodríguez de Silva y Velázquez) · probably 1624
New York, NY, Sept. 11, 2001, postmark handstamp
Artist not stated in the record · September 11, 2001
Woman Having Her Hair Combed
Edgar Degas · ca. 1886–88
Swedish feather letter
Artist not stated in the record · c. 1808
Madonna and Child Enthroned with Two Angels
Fra Filippo Lippi · ca. 1440
Cover sent from Lima, OH to Florida
Artist not stated in the record · March 12, 1888
Armor
Artist not stated in the record · ca. 1535
Regulus 1 missile mail container
Artist not stated in the record · June 8, 1959
Madonna and Child Enthroned with Saints
Raphael (Raffaello Sanzio or Santi) · ca. 1504
Rural Free Delivery wagon model
Terre Haute Carriage & Buggy Company · c. 1896- c. 1905
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
Regulus I Missile Mail container
Artist not stated in the record · June 8, 1959
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. 765 matched · 24 examined · 1 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. 2538608 matched · 40 examined · 3 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 2026-08-31 21:30 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.