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SPIF
Signed, tamper-evident provenance for AI outputs
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.
Hey PH! Multi-step AI pipelines (model, tool call, retry, agent handoff) lose the trail once you flatten everything down to text or JSON logs. After the fact you can't answer "what produced this, was it changed, can I prove it." SPIF packages that whole trail into one signed, offline-verifiable artifact.
I benchmarked it against real provenance systems, not just plain JSON. Against in-toto's signed DSSE envelope, it's roughly tied on verify speed with an 8% smaller payload. Against Sigstore's keyless signing, it's about 417x faster on verify since it skips the network and transparency-log round trip by design.
I tried to be upfront about the gaps too. No public transparency log like Sigstore/Rekor, no policy language like in-toto.
About SPIF on Product Hunt
“Signed, tamper-evident provenance for AI outputs”
SPIF was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #143 on the daily leaderboard. 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.
On the analytics side, SPIF competes within Developer Tools, Artificial Intelligence, GitHub and Security — topics that collectively have 1M followers on Product Hunt. The dashboard above tracks how SPIF performed against the three products that launched closest to it on the same day.
Who hunted SPIF?
SPIF was hunted by Kalinov jim rozensky Dameus. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of SPIF including community comment highlights and product details, visit the product overview.
Kalinov jim rozensky Dameus