Proof-of-Sibling Block: Trust-Minimized Sibling Verification in the Litecoin AuxPoW Ecosystem
We introduce Proof-of-Sibling Block (PSob), a cryptographic verification primitive that leverages the deterministic multi-chain Merkle commitment structure inherent in Litecoin Auxiliary Proof-of-Work (AuxPoW) merge-mining to verify AuxPoW block inclusion and sibling co-mining across — indexed Scrypt chains. With an additional transaction Merkle branch it also proves transaction inclusion. The proof is trust-minimized relative to a Litecoin checkpoint; it does not move assets, provide custody, or cover native PoW blocks that carry no AuxPoW witness. The live indexer serves — indexed blocks and — sibling groups; the latest group joins — chains under Litecoin #—.
Empirical Evidence & Theoretical Proofs
Cryptographic verification results from live mainnet co-mining telemetry and consensus invariant formalization.
Live chain coverage & latest sibling heights
Indexer v— · — configuredLoading live indexer chains…
Read the formal paper (v1.1)
The PDF is the formal paper (v1.1) and includes the October 2026 live addendum. The indexer snapshot on this page is live and may be newer: — indexed chains, — proofs and — sibling groups; latest —-leg group at Litecoin #—.
Concrete Technology Stack Built on PSob
PSob is not merely theoretical — it directly powers 4 production-grade systems across the Dedoo Framework.
Universal Multi-Chain ZK Peg-In Bridge
Single SP1 zkVM guest circuit verifying Scrypt PoW and AuxPoW headers for any of the 9 auxiliary chains. Routes wrapped token mints (wJKC, wDINGO, wLKY, wDOGE) on Base / LitVM using a single ImageID.
P2P Swap Intent Swarm
Libp2p gossipsub swarm publishing verified sibling headers and signed swap intents on /psob/headers/v1, /psob/siblings/v1 and /psob/intents/v1. Every payload is self-verifiable client-side without full node RPCs.
PSob Light Client SDK (@dedoo/psob-sdk)
Ultra-light TypeScript and WebAssembly SDK allowing web browsers, MetaMask Snaps, and mobile wallets to verify auxiliary chain inclusion proofs in less than 244 bytes without full node RPCs.
Dedoo Sibling Block Explorer
The first multi-chain explorer that clusters auxiliary blocks under shared parent Litecoin blocks, exposing cryptographic Merkle paths and proof downloads directly to developers.