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” — 64 records examined, 4 dropped by the rights gate.
Archives queried 2026-08-31 21:21 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Shirt of Mail and Plate of Al-Ashraf Sayf ad-Din Qaitbay (ca. 1416/18–1496), 18th Burji Mamluk Sultan of Egypt
Artist not stated in the record · ca. 1468–96
Receipt for mail to be delivered on March 24, 1970
Artist not stated in the record · c. 1970
Study for "A Sunday on La Grande Jatte"
Georges Seurat · 1884
Receipt for mail to be delivered on March 24
Artist not stated in the record · c. 1970
'Otua fefine (deity figure)
Ha'apai Islands artist · Early 19th century
Albany Letter Express definitive handstamp delivered March 24, 1970
Artist not stated in the record · c. 1970
Drop-front desk (secrétaire à abattant or secrétaire en cabinet)
Adam Weisweiler · ca. 1787
Postal rates and regulations form letter
Artist not stated in the record · 1838
Federico Gonzaga (1500–1540)
Francesco Francia · 1510
Post rider receipt
Artist not stated in the record · March 19, 1687
Armor
Artist not stated in the record · ca. 1535
New York, NY, Sept. 11, 2001, postmark handstamp
Artist not stated in the record · September 11, 2001
Blind Orion Searching for the Rising Sun
Nicolas Poussin · 1658
Swedish feather letter
Artist not stated in the record · c. 1808
Young Lady in 1866
Edouard Manet · 1866
Cover sent from Lima, OH to Florida
Artist not stated in the record · March 12, 1888
Joan of Arc
Jules Bastien-Lepage · 1879
Regulus 1 missile mail container
Artist not stated in the record · June 8, 1959
Philip IV (1605–1665), King of Spain
Velázquez (Diego Rodríguez de Silva y Velázquez) · probably 1624
Rural Free Delivery wagon model
Terre Haute Carriage & Buggy Company · c. 1896- c. 1905
Woman Having Her Hair Combed
Edgar Degas · ca. 1886–88
Regulus I Missile Mail container
Artist not stated in the record · June 8, 1959
Madonna and Child Enthroned with Two Angels
Fra Filippo Lippi · ca. 1440
Letter
Artist not stated in the record · December 2, 1847
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. 2399 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. 2187782 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 21:21 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.