# Proof-Verified Bridges Replace Trusted Signers

Cross-chain designs keep shifting from signer committees toward on-chain verification of the other chain's consensus, because repeated multisignature bridge failures make trusted relayers the weakest and most expensive part of interoperability.

- Conviction: 38 / 100 (weakening)
- Horizon: Emerging (watchlist)
- Tracking since: 2026-11-13T00:00:00.000Z
- Last updated: 2026-11-14T14:08:09.786Z
- Canonical: https://polylog.news/crypto/trends/proof-verified-cross-chain-links
- Publisher: Polylog
- Affected regions: Global

## Recent score history

- 2026-11-13: 40
- 2026-11-14: 38

## Recent evidence

- [confirms] Seam Verifies Every Zcash Block Header Inside a Base Contract and Proves Shielded Payments Without Linking the Chains (2026-11-13): Seam verifies every Zcash block header inside a Base contract, checking Zcash's proof of work with Ethereum's BLAKE2b precompile, so Base contracts can act on Zcash payments without a trusted bridge operator. This replaces a signer committee with on-chain consensus verification, which is the shift the thesis describes.