0xa9261be81f480e75e933465449e8c9e01dca66c72a8ff61e6fc46a5df1a6c847

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.