0x90cdb00dcf8e64f55eee39f79445cc0a1aeac190d5ddadfa5c6b48784f02df0a

How to verify this batch yourself

Take any stamp's content hash, walk the merkle proof in its certificate to recompute the root, then call timestamps(root) on the BA Stamper contract on any Polygon full node. The block timestamp returned is the on-chain proof — no trust in BA Stamp required.