The last 256 blocks verify unbroken. Over the full ledger, 135 broken links and 155 sequence gaps were measured on 2026-08-24 (record CMMX_CHAIN_LINK_MEASURE_20260824_V1). One third is re-derived.
Two different statements that are often confused. Integrity means: every block hangs cryptographically on the previous one, nothing was altered afterwards. Reproduction means: the value was recomputed from its inputs and matches. The first holds for everything, the second for one third.
capture.src_mtime). The re-derivation itself runs hourly and passed most recently minutes ago — what is old is the artefact being reproduced, not the check. The figures therefore prove that a February state can still be recomputed exactly; they say nothing about today's artefacts.
Floating-point agreement: 39 of 39 checks within tolerance, largest relative gap 1.95e-15. all agree
Chain 58 s
| append-only | YES |
| Pipeline in sync | YES |
| Temporally coherent | YES |
Head state_hash | 386886a0ad23c7d5cbc37597ba4e8c18… |
Head prev_hash | cbca20f6f84223a50130ea40cec8dc6d… |
Head seq | 75476 |
Signature 32 s
| payload.v | CMMX-ATTEST-1 |
| payload.seq | 75476 |
| payload.mmr_root | 2f77f7e84b88a84a1967b1e451f70bf3ba50abeb2969… |
| payload.freeze_hash | af4587e43752c175fb825f390977e4733c645746fa90… |
| payload.state_time | 2026-09-11T04:38:29.880966+00:00 |
| payload.attested_at | 2026-09-11T04:38:56Z |
| ed25519.alg | Ed25519 |
| ed25519.pubkey_fingerprint | 2001f57eee4a7a56 |
| ed25519.signature_present | JA |
| ed25519.pubkey_hex | 764b02cf193e0cfaa0e3f8d80e9276275dab70e8d50c… |
| mldsa.alg | ML-DSA-65 |
| mldsa.pubkey_fingerprint | a3e323f0640c5fa9 |
| mldsa.signature_present | JA |
Hybrid: Ed25519 verify(pubkey_hex, signature_hex, canonical) AND ML-DSA-65 verify(mldsa_pubkey_hex, mldsa_signature_hex, canonical); canonical = json.dumps(payload, sort_keys=True, separators=(',',':')).encode()
Provenance
| Chain | live/…/observer_web/static/cmmx_unified_state.json |
| Chain | live/…/runtime/STATE_CHAIN.jsonl |
| Signature | live/…/observer_web/static/cmmx_attestation.json |
| Reproduction | reproduce_leg/…/REPRODUCE_REAL_REPORT.json |