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. 12 shown for “1c Arnold & Co. revenue stamp single” — 41 records examined, 1 dropped by the rights gate.
Archives queried 2026-09-01 03:48 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
View of Toledo
El Greco (Domenikos Theotokopoulos) · ca. 1599–1600
1c Arnold & Co. revenue stamp single
Artist not stated in the record · 1872
1c C.E. Hull & Co. Medicine proof
Artist not stated in the record · 1864
1c Documentary Proprietary revenue stamp with fancy cancel single
Artist not stated in the record · 1862
1c Maryland Match Company revenue stamp single
Artist not stated in the record · 1872
1c Alligator Match Company revenue stamp single
Artist not stated in the record · 1880
1c Barber Match Company revenue stamp single
Artist not stated in the record · 1878
1c J.J. Allen's Sons revenue stamp single
Artist not stated in the record · 1882
1c Griggs and Goodwill revenue stamp single
Artist not stated in the record · 1875
1c Ives Matches revenue stamp single
Artist not stated in the record · 1867
1c Byam, Carlton and Company wrapper revenue stamp single
Artist not stated in the record · 1865
1c E.R. Tyler revenue stamp single
Artist not stated in the record · 1866
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. 1 matched · 1 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.1 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 86 matched · 40 examined · 1 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 03:48 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.