How do I know which version was signed?
Bind signing evidence to one exact document state and keep the revision relationship explicit.
Read the evidence and limitations →Problems, not products
What document problem are you trying to solve?
Start with a real question. Each answer links to current capability, limitations, a demonstration and a way to challenge the proposal.
How do I prove a document was not altered?
Verify the sealed state locally. Report signature, identity, time and current status as separate trust dimensions.
Read the evidence and limitations →How do I preserve chain of custody?
Carry declared provenance and evidence records with the document while preserving the role of external procedures and witnesses.
Read the evidence and limitations →How do I amend a final agreement without overwriting it?
Keep the sealed UDS final. Derive a new living UDR amendment that points back to it.
Read the evidence and limitations →How do I preserve provenance after a document leaves its source system?
Package inspectable source, state and lineage information so it can travel across system boundaries.
Read the evidence and limitations →How do I migrate thousands of PDFs?
Inventory, sample, preserve originals, convert in stages, expose exceptions and reconcile every source.
Read the evidence and limitations →How can a document explain itself?
Use document-bound structure, local retrieval and cited answers; refuse unsupported questions.
Read the evidence and limitations →How can CAC/PIV sign something better than a PDF?
Keep the credential and test a document substrate that binds evidence to an exact state. Production CAC/PIV support remains unverified.
Read the evidence and limitations →How can an amended tax filing preserve lineage?
Model original and amended states as related records without claiming authority filing acceptance.
Read the evidence and limitations →How can clinical provenance travel outside the EHR?
Preserve document identity and lineage alongside established healthcare exchange systems; public demos use synthetic data.
Read the evidence and limitations →How can trust travel with a financial record?
Preserve integrity and provenance without mistaking them for numerical accuracy, compliance or economic truth.
Read the evidence and limitations →