ERC-8325 Asset Anchor Registry

ReviewERCcreated 2026-07-04requires ERC-165

A registry interface for registry-scoped token-to-anchor bindings for off-chain asset claims

Authors: Chris Turner, David Hay (@david-hay), Reagan Simpson (@krumg111), Collins Musyimi (@Musyimi97)

ERC-165 interface ids

Computed here as the XOR of the selectors each interface defines.

IAssetAnchorRegistry	`0x52a94b86`
IAssetAnchorRegistryLifecycle	`0x6d8a9795`
IAssetAnchorRegistryRecovery	`0xe2cb93dc`
IAssetBoundToken	`0x6e4d3d14`
IAssetBoundTokenId	`0x4a967b01`

`0x5b59619c`	`anchorId()`	view
`0x6e5e9e49`	`anchorIdOf(uint256)`	view
`0x5a180c0a`	`anchorRegistry()`	view
`0x4db66b0c`	`bindToken(bytes32,address,bytes32,uint256)`
`0xf4fa0648`	`deactivateAnchor(bytes32,string)`
`0x7feb51d9`	`getAnchor(bytes32)`	view
`0xa5961b4c`	`getMetadata(bytes32)`	view
`0xee6fc51e`	`invalidateTokenBinding(bytes32,bytes32)`
`0x5c36901c`	`isActive(bytes32)`	view
`0x6f0c5082`	`isAnchorActive()`	view
`0x7ed0e942`	`isAnchorActiveFor(uint256)`	view
`0x0ca456c2`	`isBindingValid(bytes32)`	view
`0xe0d16cd8`	`isBound(bytes32)`	view
`0x83d0c9dc`	`reattest(bytes32,uint64,uint64)`
`0x8faf742d`	`registerAnchor(bytes32,bytes32,bytes)`
`0x0f8a69a6`	`registerAndBind(bytes32,bytes32,bytes,address,bytes32,uint256)`
`0xe300d351`	`registeredBy(bytes32)`	view

0x01ffc9a7 supportsInterface(bytes4) ERC-165

Topic0 is the keccak256 hash of the signature, which is what a log filter matches on.

`0xa391e42d401acd61c41faafb5e04f1e3a765bdcb80fd00277d7c857c3a2cd8fd`	`AnchorRegistered(bytes32,bytes32,bytes32)`
`0x1970ac413b16f986eb9844ec686c938051270c902c79c8691e8c1f82b19c6995`	`TokenBound(bytes32,address,bytes32,uint256)`
`0x47d56623f7981c96a0e5d09f51417c85bb3fa45620cf5e6f4d38e5e8864246a7`	`AnchorDeactivated(bytes32,string)`
`0x13c68fc84e24a64c9bbc24dd56c843ee379d1d9b134b264914d0f39955d16e7e`	`AnchorReattested(bytes32,uint64,uint64,uint64)`
`0x41da6889dd5d195a8984212868c60cbe3edf7c0f9c9595fcc0b4a40630cb64ce`	`TokenBindingInvalidated(bytes32,address,bytes32,uint256,bytes32)`