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 USPO Despatch carrier stamp on cover” — 40 records examined, 1 dropped by the rights gate.
Archives queried 2026-09-01 01:05 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.The Metropolitan Museum of Art: HTTP 403 from collectionapi.metmuseum.org. Results from the remaining archive are shown unchanged — nothing is substituted for a source that did not answer.
1c USPO Despatch carrier stamp on cover
Artist not stated in the record · c. 1851
1c Franklin and 3c Washington with USPO Despatch carrier cancel on cover
Artist not stated in the record · c. 1851
3c Washington quadruple rate with Blood's Penny Post carrier stamp on cover
Artist not stated in the record · 1857
New York Carrier cancel cover
Artist not stated in the record · c. 1855
1c Franklin with New York Carrier cancel cover
Artist not stated in the record · c. 1852
3c Washington with Blood's Penny Post carrier stamp on cover
Artist not stated in the record · 1853
Eagle Post local stamp on cover
Artist not stated in the record · c. 1850
1c Eagle carrier card plate proof
Artist not stated in the record · 1893
1c Baltimore MD City Carrier forgery single
Artist not stated in the record · c. 1862-1892
(1c) Franklin General Issue Carrier forgery single
Artist not stated in the record · c. 1862-1892
1c New York NY City Carrier forgery single
Artist not stated in the record · c. 1875-1886
10c Washington on Noisy Carrier's cover
Artist not stated in the record · 1855-1857
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. HTTP 403 from collectionapi.metmuseum.org. No records from this archive are shown for this query.Unavailable - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 1004928 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 01:05 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.