01
Problem
Media gets shared. Intent gets lost.
Short videos can move attention, but the action layer is still a visible QR, a link in a caption, or a brittle manual search.
hackathon deck
Light and Sound Show
A signed action layer embedded inside the videos people already watch, share, project, and replay.
02
Idea
Turn the video itself into the ticket.
We hide a signed manifest inside ordinary MP4s using subtle light changes and an ultrasonic side channel, then resolve it after a phone scan.
03
Architecture
A packet layer for creative media.
Issuer signs an LSSP/1 payload, the embedder repeats packet frames, the reader reconstructs observations, and the resolver opens the verified action.
04
Carrier
Built for repeated recovery, not one perfect frame.
The visual path carries 64 bytes per carrier frame with indexes, length, magic, and checksum. Three seconds at 30fps gives 90 observation slots.
05
Trust
Authenticity travels with the reel.
The manifest is signed with Ed25519. The demo favors pointer payloads for production and full manifest payloads for offline hackathon proof.
06
Roadmap
From prototype to resilient channel.
Next: benchmark social recompression, add stronger error correction, fuse audio and visual reads, and ship issuer key infrastructure.