Paste a SPAN proof token (printed on every court bundle) to verify the evidence's integrity, on-chain anchor and chain of custody — without a SPAN account.
01
Token-based proof
Every SPAN evidence carries a single URL-safe token that travels in court bundles — no SPAN account needed to verify.
02
Offline-verifiable
HMAC-SHA256 over evidence_id + SHA-256 of file bytes + capture timestamp. Auditors can replicate the verification in 3 lines of Python.
03
Tamper-evident chain
Any change to the file, ID, or timestamp will fail the verification. Combined with blockchain anchor for third-party timestamping.
Install SPAN as an app
Works offline · push notifications · home-screen access