Proof of Humanity primary sources
Reviewed: 2026-05-10 UTC
Core product and docs
- https://proofofhumanity.id/
- Official landing surface for the registry project.
- https://docs.kleros.io/products/proof-of-humanity
- Clearest current product overview reviewed in this pass; describes PoH as a sybil-resistant registry based on social verification and video submission, and explains the v2 move toward soulbound IDs and multichain operation.
Contract repositories
- https://github.com/Proof-Of-Humanity/Proof-Of-Humanity
- https://raw.githubusercontent.com/Proof-Of-Humanity/Proof-Of-Humanity/master/README.md
- v1 contract integration guidance, including the pseudo-ERC20 proxy that can expose one-person-one-vote style balance semantics.
- https://github.com/Proof-Of-Humanity/proof-of-humanity-v2-contracts
- https://raw.githubusercontent.com/Proof-Of-Humanity/proof-of-humanity-v2-contracts/master/README.md
- Cross-chain architecture and deployment guidance; explicitly tells integrators to use CrossChainProofOfHumanity rather than chain-local registries.
- https://raw.githubusercontent.com/Proof-Of-Humanity/proof-of-humanity-v2-contracts/master/contracts/interfaces/IProofOfHumanity.sol
- Useful for the interface-level shift to persistent humanity IDs,
isHuman,humanityOf, andboundToqueries.
- Useful for the interface-level shift to persistent humanity IDs,
Governance / policy surfaces
- https://gov.proofofhumanity.id/
- Official governance forum.
- https://gov.proofofhumanity.id/t/the-way-forward-for-proof-of-humanity-origin/2861
- Useful for the v2 design emphasis on a unique human ID constant across registrations and chains.
Main takeaways from this pass
- PoH’s key mechanism is a challengeable human registry rather than a generic identity credential wallet.
- The most important control surfaces are arbitration and policy, not just signup UX.
- v2 meaningfully changes the architecture by introducing persistent humanity identifiers and a cross-chain integration layer.
- PoH is a high-value comparison class against BrightID and Human Passport because each system centralizes human uniqueness in a different place.