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. 22 shown for “Mail Early with Christmas Stamps poster” — 64 records examined, 25 dropped by the rights gate.
Archives queried 2026-08-27 21:24 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Mail Shirt
Artist not stated in the record · probably early 16th century
Mail Early with Christmas Stamps poster
Artist not stated in the record · 1967
Armet
LIONARDO · ca. 1440
Mail Early with Christmas Stamps poster
Artist not stated in the record · 1967
Composed Armor for Man and Horse
Missaglia workshop · ca. 1450–1525 and later
Airmail poster
Artist not stated in the record · c.1949-1958
Hauberk of Mail
Artist not stated in the record · 15th century
Sleeve of Mail
Artist not stated in the record · 16th century
Military mail holiday shipping schedule
Artist not stated in the record · 1967
Composed Armor
Matthes Deutsch · 15th century and later
Airmail poster advertising the ten-cent rate
Artist not stated in the record · 1927
Lukas Spielhausen
Lucas Cranach the Elder · 1532
Turban Helmet
Artist not stated in the record · late 15th century
Mr. ZIP standing cut-out
Artist not stated in the record · c. 1970
Circus Sideshow (Parade de cirque)
Georges Seurat · 1887–88
City Free Delivery mailbox
Artist not stated in the record · 20th century
Armor for Man and Horse
Artist not stated in the record · comprehensively ca. 1450–1550
V-Mail Letter Sheet
Artist not stated in the record · 1942-1945
Turban Helmet
Artist not stated in the record · late 15th century
Pitney Bowes Model M postage meterhead
Artist not stated in the record · 1920
Turban Helmet
Artist not stated in the record · late 15th century
Express Cover
Artist not stated in the record · 1862
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. 33 matched · 24 examined · 3 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. 286767 matched · 40 examined · 22 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 2026-08-27 21:24 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.