Copyright Status Public Domain Year Boundary Checker
Compare actual date with independently qualified-lawyer/source established work/jurisdiction copyright boundary. No universal publication-year cutoff, automatic public-domain status, foreign/restored rights, privacy, trademark or permissions determination.
Description
A public-domain boundary depends on applicable rights facts and law.
A public-domain boundary depends on applicable rights facts and law.1
Comparing a review date with an independently established boundary does not determine that boundary. Use this tool to calculate the stated observation or conditional model from supplied measurements.
When to use Copyright Status Public Domain Year Boundary Checker
Use this tool to calculate the stated observation or conditional model from supplied measurements. Establish the institution, collection/material context, applicable standards or authority, reference date and measurement units.
How to use Copyright Status Public Domain Year Boundary Checker and understand its results
- Establish the institution, collection/material context, applicable standards or authority, reference date and measurement units.
- Enter callerVerifiedRightsReviewDate, callerIndependentlyEstablishedPublicDomainBoundaryDate, using the field meanings and rules below, then run the tool.
- Read result.atOrAfterCallerRightsBoundary, result.signedDaysAfterCallerBoundary. Interpret each field using the units, signs and evidence rules below.
- If input validation fails, correct the reported field and run again. Before applying a successful result, check the stated reference scope, units, assumptions and any retained unknown evidence.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerVerifiedRightsReviewDate | Caller verified rights review date | string | Required |
| callerIndependentlyEstablishedPublicDomainBoundaryDate | Caller independently established public domain boundary date | string | Required |
Parse real Gregorian boundary and review dates in YYYY-MM-DD, years 0001–9999. Return signed review-minus-boundary calendar days and whether that difference≥0. Equal dates meet the comparison; no copyright term, jurisdiction or public-domain date is derived.
daysAfterBoundary=ordinal(reviewDate)−ordinal(callerBoundaryDate); atOrAfter=(daysAfterBoundary≥0) Apply the field units and exact ordering, boundary and evidence rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result containing the calculation or selected reference fields below | object |
| result.atOrAfterCallerRightsBoundary | At Or After Caller Rights Boundary; use the units, sign convention and calculation stated above | boolean |
| result.signedDaysAfterCallerBoundary | Signed Days After Caller Boundary; use the units, sign convention and calculation stated above | number |
{
"input": {
"callerVerifiedRightsReviewDate": "2026-01-01",
"callerIndependentlyEstablishedPublicDomainBoundaryDate": "2026-01-01"
},
"output": {
"result": {
"atOrAfterCallerRightsBoundary": true,
"signedDaysAfterCallerBoundary": 0
}
}
}Limitations and assumptions
Comparing a review date with an independently established boundary does not determine that boundary. Results depend on the independently established measurement basis and the exact model assumptions above.
Every listed input requires an explicit value. Unexpected fields, incorrect value types, nonfinite numbers and sparse numeric arrays fail validation; tool-specific bounds and alignment rules apply as described above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful calculation that reports a false comparison or retains unknown evidence.
Alternative or Complementary methods
Use Privacy Embargo 100-Year Rule Personal Data Checker to examine a related aspect: Personal-data embargoes depend on the applicable rule and triggering event.
Use Deed of Gift Copyright Transfer Clause Presence Checker where its separate inputs and scope apply: A deed-of-gift copyright clause must match the rights holder, authority and transferred scope.
References
Similar or alternative tools
- Privacy Embargo 100-Year Rule Personal Data Checker
Personal-data embargoes depend on the applicable rule and triggering event.
- Deed of Gift Copyright Transfer Clause Presence Checker
A deed-of-gift copyright clause must match the rights holder, authority and transferred scope.