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The JWT signature verification failed. Check the signing key and the algorithm.
Error code:   JWTInvalidSignature
Exception:    InvalidSignatureError
Message:      Signature verification failed
Traceback:    Traceback (most recent call last):
                File "/src/libs/libapi/src/libapi/jwt_token.py", line 286, in validate_jwt
                  decoded = jwt.decode(
                      jwt=token,
                  ...<2 lines>...
                      options=options,
                  )
                File "/usr/local/lib/python3.14/site-packages/jwt/api_jwt.py", line 368, in decode
                  decoded = self.decode_complete(
                      jwt,
                  ...<8 lines>...
                      leeway=leeway,
                  )
                File "/usr/local/lib/python3.14/site-packages/jwt/api_jwt.py", line 265, in decode_complete
                  decoded = self._jws.decode_complete(
                      jwt,
                  ...<3 lines>...
                      detached_payload=detached_payload,
                  )
                File "/usr/local/lib/python3.14/site-packages/jwt/api_jws.py", line 270, in decode_complete
                  self._verify_signature(
                  ~~~~~~~~~~~~~~~~~~~~~~^
                      signing_input,
                      ^^^^^^^^^^^^^^
                  ...<4 lines>...
                      options=merged_options,
                      ^^^^^^^^^^^^^^^^^^^^^^^
                  )
                  ^
                File "/usr/local/lib/python3.14/site-packages/jwt/api_jws.py", line 417, in _verify_signature
                  raise InvalidSignatureError("Signature verification failed")
              jwt.exceptions.InvalidSignatureError: Signature verification failed

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Dataset of Transcribed Text Lines in Handwritten Estonian Documents

Dataset Description

This dataset contains 245,975 annotated text regions from Estonian historical documents, designed for optical character recognition (OCR) and document analysis tasks. The dataset includes images of text regions along with their corresponding transcriptions, and source documents.

πŸ“Š Dataset Summary

  • Total Examples: 245,975
  • Language: πŸ‡ͺπŸ‡ͺ Estonian
  • Dataset Size: ~38.9 GB
  • Task: OCR, Text Detection, Document Analysis
  • Domain: Historical Documents, Archival Materials

πŸ—‚οΈ Dataset Structure

πŸ“‹ Features

  • image: Image data containing text regions
  • text: Ground truth transcription of the text in the image
  • document: Source document name
  • AIS_reference: AIS file reference number
  • page_number: Location of frame in file

⚠️ Data Quality Notes

  • Images contain text regions extracted from historical Estonian documents
  • Text transcriptions follow modern Estonian orthography where applicable
  • Some historical texts may contain archaic spellings or formatting
  • Coordinate systems may vary depending on source document resolution

🚫 Limitations

  • Limited to Estonian language content
  • Historical document quality may affect image clarity
  • Transcription accuracy depends on document preservation state
  • Dataset size is relatively small (245,975 examples)

πŸ“ž Contact

Depending on the nature of your question, please contact one of the following:


Interreg Central Baltic Programme Co-funded by the European Union ArchXAI

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