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A proof bundle is a downloadable archive (.dpiv extension) containing everything needed to verify one attestation offline.

What’s inside a .dpiv file

A proof bundle is a ZIP archive (with a custom .dpiv extension):

How to download

From any attestation detail page on the explorer, click Download bundle. The file streams as {attestation_id}.dpiv. Programmatically:

How to verify

The bundle includes a POSIX shell script, verify.sh, that runs every check end to end. No internet connection required after download.
verify.sh uses only POSIX-standard tools (openssl, sha256sum, jq, xxd). It works on any Linux, macOS, or BSD system with these utilities installed. For programmatic verification, see the SDKs.