Proof of Uptime

Verifiable uptime proofs for compute providers, using a three-layer architecture.

Layer 1: Heartbeat Chain

• ~60 second interval, dual-signed (provider + consumer)
• Each heartbeat chains to previous via SHA-256
• ~250 bytes per heartbeat

Layer 2: Merkle Epochs

• 60 heartbeats → merkle tree → 32-byte epoch root
• Epochs chain via prevEpochHash
• Selective disclosure via merkle proofs

Layer 3: Chained Claims

• 24 epoch roots → merkle tree → claim root
• ~200 bytes on-chain per claim
• 3,681x compression ratio (24h of data)

Design Decision: No VDF

Economics solves collusion: emission rate < lease cost, so collusion is a net loss.

Threat Analysis