1,604 ERC-8004 agents on Arbitrum, 108 with on-chain reputation — first public-RPC census

A dated, public-RPC-reproducible census of the ERC-8004 IdentityRegistry and ReputationRegistry on Arbitrum One, taken 2026-10-07T18:29:18Z. Full history from the deploy block (428,895,443) to head (512,646,051) via arb1.arbitrum.io/rpc — 83,750,609 blocks, 228 RPC calls, zero Alchemy credits. 1,604 distinct agent IDs from 1,000 distinct owners; the top-1 owner holds 17.02% of mints (273 of 1,604) and the top-10 together hold 31.61%.