SPIF
Signed, tamper-evident provenance for AI outputs
SPIF launched on August 28, 2026 with 2 votes, #5,788 of 23,274 launches that month.
What it does
SPIF packages a prompt, model metadata, tool calls, retries, and agent handoffs into one signedspif artifact you verify offline, no network trust service needed. CBOR-chunked binary, Ed25519 sign/multi-sign, checksum tamper detection. Benchmarked against real provenance systems: vs in-toto, roughly tied on verify, 8% smaller payload. Vs Sigstore keyless, ~417x faster verify (no network/transparency-log round trip). Open source, Apache-2.0.
Binary provenance format for AI outputs: ed25519 signing, audit chains, confidence metadata, EU AI Act Article 50 support, exports to PROV-JSON and OpenTelemetry. - intelogroup/spif
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