Block zero.
The instrument that seals an AI fleet, turned for the first time on a human document. On June 1, 2026 a 895-page Shadow & Mirror manuscript, its collaboration mark, and its author were committed to one another — EVM-canonically, EIP-712 typed, secp256k1 signed — as the genesis block of the Planisphere mirror chain. This page is that block's reference record and methodology note. Recompute the mark's hash in your own browser, below.
The content atoms.
A content atom is an indivisible input the seal binds. Two atoms are large enough to carry their own cryptographic hash; four are typed fields signed directly. Together they are the whole of what this block commits — nothing more, nothing hidden.
- Title
- Shadow & Mirror — Treewidth as the Universal Meter of Computation, Physics, and Consciousness
- sha-256
- c6529c07…fc87b20e
→ documentHash = keccak256(bytes)
Open the source hub →- Form
- The Planisphere × Shadow-and-Mirror seal — limb, mater, cardinal cross, two brass projection arcs.
- sha-256
- f1409464…22019f70
→ sealHash = keccak256(bytes)
Open the mark →
The attestation.
The six atoms are assembled into one typed message, hashed under a Planisphere domain, and signed with a secp256k1 key — the same primitives an Ethereum node uses. The resulting digest is the block's payload root; the signature recovers the signer by ecrecover.
- Signature
- 0xcc0cbd770df9cb6e10d687539f218900812c250efb44c81f95e86161e98e5e034d4ff0924025f852d9f69ed2bdd9d7be2eafd72f3c9146cfe3f14d1cb1dedf6c1c
- Recovers to
- 0xf348EE07BAe8dB1246342fECc8A16B0eC08cc93f
- Key origin
- derived-dev — deterministic from the committed hashes; set an operator key for a production address
The block.
The block wraps the attestation digest as its payload root and commits to the block before it. Genesis has no parent — its parentHash is zero. The next attestation will point its parent at this block's hash.
- Parent
- 0x0000000000000000000000000000000000000000000000000000000000000000 (genesis)
- Number
- 0
- Timestamp
- 1780272000 · 2026-06-01T00:00:00Z
- Sealer
- 0xf348EE07BAe8dB1246342fECc8A16B0eC08cc93f
- Payload root
- 0x817a8a6beb17a36c84ee2d7fd2e36a0670246164dec8d059bc6b387f718ce4d8 (EIP-712 digest)
- Block hash
- 0x19f15104b91927f59591e14f9af18b98c4e7e4a44c4845f86e752427ab9b6f99
Change any committed field — a page of the manuscript, the timestamp, one byte of the mark — and the digest moves, the block hash moves, and every block that ever chains onto this one moves with it. As above, so below.
The chain begins here.
-
∅ The void parent0x0000000000000000000000000000000000000000000000000000000000000000
-
Genesis Block #0 you are here0x19f15104b91927f59591e14f9af18b98c4e7e4a44c4845f86e752427ab9b6f99
-
Block #1 unsealedthe next attestation will set parentHash = 0x19f15104…ab9b6f99
Recompute the mark.
Don't trust the hashes above — recompute one. Your browser will fetch the seal.svg this page serves and hash its bytes with the Web Crypto API, then compare to the sha-256 Planisphere committed. The same bytes feed keccak256 to produce the sealHash sealed into the block. Match the SHA and you have confirmed the mark atom, on your own machine.
fetch('/seal.svg') → crypto.subtle.digest('SHA-256') → compare
Committed sha-256
Recomputed in your browser
This page recomputes one atom with the browser's own hash function. The full EVM layer — the EIP-712 digest, the keccak256(rlp(header)) block hash, and the ecrecover of the signer — is recomputable byte-for-byte from the canonical genesis.json. The public Shadow & Mirror hub now lives at logan.engineering.