Tamper-evident manifests
Any alteration after signing breaks the cryptographic signature, so authenticity disputes start from verifiable facts instead of competing recollections.
C2PA for Legal
How law firms and in-house teams use C2PA manifests for tamper-evident contracts, filings, and independent proof of when a document existed in what form.
The problem
Why legal teams need provenance
Contracts, filings, and exhibits move through email chains where any copy can be altered without a trace. Establishing which version is authentic, and when it existed, consumes discovery hours and expert fees. AI-generated fabrications are making authenticity disputes more common, not less.
What you get
What C2PA gives legal teams
Independent timestamps (RFC 3161)
A trusted Time Stamp Authority attests when a document existed in its signed form, useful for priority, notice, and chain-of-custody documentation.
Coverage across legal formats
PDF, DOCX, images, and unstructured text are all signable, so one workflow covers contracts, filings, exhibits, and correspondence.
Standards-based proof
The official C2PA Conforming Products List records Encypher as a conformant generator product at assurance Level 1, with generation and validation coverage across 20 media types (conformance dated May 26, 2026). Encypher's claim-signing and timestamp authorities appear on the official C2PA Trust Lists. That matters when the signing infrastructure behind a document is itself questioned.
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See it on your own content
Tamper-evident documents with independent proof of signing time.