Attest's Horizen archive

Attest anchored its records on the Horizen blockchain until October 24, 2026, and on Base since. Horizen stops on November 5, 2026. Before it does, Attest archived every anchor it made there and every Hubz VCE record it sent there, each with a storage proof against Horizen's state, and that state is the one Horizen posted to Base. Anyone can check a record from Horizen against Base, with no Horizen node and without trusting Attest.

Anchors: 1,353 (768 on AttestRegistryV3, 585 on AttestRegistryV2)
Attest's wallets: 70, with when each was registered and whether it was revoked
Key directory roots: 29
EvidenceAnchor: 528,712 Hubz VCE records in all, proven by its counter; 1,269 sent by Attest, each proven
SecureScanAnchor: 17,251 Hubz VCE records in all, proven by its counter; 75 sent by Attest, each proven
Proven at: Horizen block 29,513,747
Checked against: Horizen's state root in dispute game #53 on Base, from Horizen's dispute game factory 0x4e2c464380fb26b0c5f9b90edf754c4e2a8d1a90
Archive ID: 03ae6265725c8e317d331e0bbed0e0cc87a33e137a75b97e35a652d1236a3ed5

Attest's contracts on Horizen

AttestRegistryV3
0xf44ed281005c7d506dc50829a3e24655837fbf75
Holds Attest's anchors until October 24, 2026, and the wallets Attest registered.
AttestRegistryV2
0x0c6a7918e2f8c28c4bb5cf8d0f4ce27e9b30fa2a
Holds Attest's anchors until October 12, 2026.
AttestKeyDirectory
0x36ec83986e59f2936e6dcbf35dda239c879d0bf5
Holds the roots of Attest's public key directory until the cutover.
EvidenceAnchor
0xab258c03ced211cd1be12e00ac4a7007a7ffd9e0
Holds Hubz VCE's evidence records, each sent in its own transaction.
SecureScanAnchor
0x7b32721e375a19dd0d9fc8359f383139ec561209
Holds Hubz VCE's security scan records, each sent in its own transaction.

A record's page on Attest checks its Horizen anchor from this archive. Each Horizen transaction Attest links to has its own page here, with the proof to check it yourself. The proofs are served at /api/horizen/proofs, and the open verifier checks them the same way.