{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:KYAKAG5JNTSROCJO3QWVTL3BUW","short_pith_number":"pith:KYAKAG5J","canonical_record":{"source":{"id":"2606.19066","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.bio-ph","submitted_at":"2026-06-17T13:40:08Z","cross_cats_sorted":["nlin.AO","physics.soc-ph"],"title_canon_sha256":"69c5395d4e400f3c74ee1000b64fcee262125043483206b920906d2e7a16cca6","abstract_canon_sha256":"8f80a87412f40518ecfbb42d052f59599289e9d2884a7cd01d75253c11669eb8"},"schema_version":"1.0"},"canonical_sha256":"5600a01ba96ce517092edc2d59af61a5a04f1bf13547c3ad7d3391947b241735","source":{"kind":"arxiv","id":"2606.19066","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.19066","created_at":"2026-06-19T16:11:55Z"},{"alias_kind":"arxiv_version","alias_value":"2606.19066v1","created_at":"2026-06-19T16:11:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.19066","created_at":"2026-06-19T16:11:55Z"},{"alias_kind":"pith_short_12","alias_value":"KYAKAG5JNTSR","created_at":"2026-06-19T16:11:55Z"},{"alias_kind":"pith_short_16","alias_value":"KYAKAG5JNTSROCJO","created_at":"2026-06-19T16:11:55Z"},{"alias_kind":"pith_short_8","alias_value":"KYAKAG5J","created_at":"2026-06-19T16:11:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:KYAKAG5JNTSROCJO3QWVTL3BUW","target":"record","payload":{"canonical_record":{"source":{"id":"2606.19066","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.bio-ph","submitted_at":"2026-06-17T13:40:08Z","cross_cats_sorted":["nlin.AO","physics.soc-ph"],"title_canon_sha256":"69c5395d4e400f3c74ee1000b64fcee262125043483206b920906d2e7a16cca6","abstract_canon_sha256":"8f80a87412f40518ecfbb42d052f59599289e9d2884a7cd01d75253c11669eb8"},"schema_version":"1.0"},"canonical_sha256":"5600a01ba96ce517092edc2d59af61a5a04f1bf13547c3ad7d3391947b241735","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-19T16:11:55.764842Z","signature_b64":"AMPG9lNPgGKGlWYTcy/cBEffP0WMTYxy2L7XmsJ4gsFx5LbNrwsmiuWD7QAs7OAYR5S+JG62h6u9iXdsL4I3Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5600a01ba96ce517092edc2d59af61a5a04f1bf13547c3ad7d3391947b241735","last_reissued_at":"2026-06-19T16:11:55.764499Z","signature_status":"signed_v1","first_computed_at":"2026-06-19T16:11:55.764499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.19066","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-19T16:11:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eZdBZEQAGKurWOIJ4dhteu1XMsKd+P1ewo4nXVaOsijvpYdTI8GAVUTcIs8lG04JH3LEYuGnPwRiLDDEM4+bDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T23:07:27.388845Z"},"content_sha256":"640a8ee6132e5ad8f1d1fd7221f0ee1c8608b02488cca82a1295bc225c5cac7e","schema_version":"1.0","event_id":"sha256:640a8ee6132e5ad8f1d1fd7221f0ee1c8608b02488cca82a1295bc225c5cac7e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:KYAKAG5JNTSROCJO3QWVTL3BUW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"External Entropy Production and Human Evolution toward Multi-body Life","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["nlin.AO","physics.soc-ph"],"primary_cat":"physics.bio-ph","authors_text":"Kenji Toma, Yasuji Sawada","submitted_at":"2026-06-17T13:40:08Z","abstract_excerpt":"Ancient human beings started \"external entropy production\" in a late stage of evolution, in addition to the internal entropy production by which energy was dissipated within the body of life, as previously described consistently with the birth of life by maximum entropy production principle. In this paper, the mechanism for development of external entropy production, which is strongly related with use of tools and controlling fire, is theoretically investigated. Archaeological data show that the brain size of ancient human beings started rapid increase around 2.5 million years ago when the usa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.19066","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.19066/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-19T16:11:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FSkfV1nV8aGeUPE/nc2I/9GfFYQC4oIj9rPj0HfmiWwsevTxMCL44H0gWOHb/W85ASmwAkgeBxRzp4dUbckQDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T23:07:27.389218Z"},"content_sha256":"b86e801954213b1c186d660b7ddb22b63c4ee8bfd043043c5b6001c26de1e0c3","schema_version":"1.0","event_id":"sha256:b86e801954213b1c186d660b7ddb22b63c4ee8bfd043043c5b6001c26de1e0c3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KYAKAG5JNTSROCJO3QWVTL3BUW/bundle.json","state_url":"https://pith.science/pith/KYAKAG5JNTSROCJO3QWVTL3BUW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KYAKAG5JNTSROCJO3QWVTL3BUW/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-21T23:07:27Z","links":{"resolver":"https://pith.science/pith/KYAKAG5JNTSROCJO3QWVTL3BUW","bundle":"https://pith.science/pith/KYAKAG5JNTSROCJO3QWVTL3BUW/bundle.json","state":"https://pith.science/pith/KYAKAG5JNTSROCJO3QWVTL3BUW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KYAKAG5JNTSROCJO3QWVTL3BUW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:KYAKAG5JNTSROCJO3QWVTL3BUW","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"8f80a87412f40518ecfbb42d052f59599289e9d2884a7cd01d75253c11669eb8","cross_cats_sorted":["nlin.AO","physics.soc-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.bio-ph","submitted_at":"2026-06-17T13:40:08Z","title_canon_sha256":"69c5395d4e400f3c74ee1000b64fcee262125043483206b920906d2e7a16cca6"},"schema_version":"1.0","source":{"id":"2606.19066","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.19066","created_at":"2026-06-19T16:11:55Z"},{"alias_kind":"arxiv_version","alias_value":"2606.19066v1","created_at":"2026-06-19T16:11:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.19066","created_at":"2026-06-19T16:11:55Z"},{"alias_kind":"pith_short_12","alias_value":"KYAKAG5JNTSR","created_at":"2026-06-19T16:11:55Z"},{"alias_kind":"pith_short_16","alias_value":"KYAKAG5JNTSROCJO","created_at":"2026-06-19T16:11:55Z"},{"alias_kind":"pith_short_8","alias_value":"KYAKAG5J","created_at":"2026-06-19T16:11:55Z"}],"graph_snapshots":[{"event_id":"sha256:b86e801954213b1c186d660b7ddb22b63c4ee8bfd043043c5b6001c26de1e0c3","target":"graph","created_at":"2026-06-19T16:11:55Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.19066/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ancient human beings started \"external entropy production\" in a late stage of evolution, in addition to the internal entropy production by which energy was dissipated within the body of life, as previously described consistently with the birth of life by maximum entropy production principle. In this paper, the mechanism for development of external entropy production, which is strongly related with use of tools and controlling fire, is theoretically investigated. Archaeological data show that the brain size of ancient human beings started rapid increase around 2.5 million years ago when the usa","authors_text":"Kenji Toma, Yasuji Sawada","cross_cats":["nlin.AO","physics.soc-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.bio-ph","submitted_at":"2026-06-17T13:40:08Z","title":"External Entropy Production and Human Evolution toward Multi-body Life"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.19066","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:640a8ee6132e5ad8f1d1fd7221f0ee1c8608b02488cca82a1295bc225c5cac7e","target":"record","created_at":"2026-06-19T16:11:55Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"8f80a87412f40518ecfbb42d052f59599289e9d2884a7cd01d75253c11669eb8","cross_cats_sorted":["nlin.AO","physics.soc-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.bio-ph","submitted_at":"2026-06-17T13:40:08Z","title_canon_sha256":"69c5395d4e400f3c74ee1000b64fcee262125043483206b920906d2e7a16cca6"},"schema_version":"1.0","source":{"id":"2606.19066","kind":"arxiv","version":1}},"canonical_sha256":"5600a01ba96ce517092edc2d59af61a5a04f1bf13547c3ad7d3391947b241735","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5600a01ba96ce517092edc2d59af61a5a04f1bf13547c3ad7d3391947b241735","first_computed_at":"2026-06-19T16:11:55.764499Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-19T16:11:55.764499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AMPG9lNPgGKGlWYTcy/cBEffP0WMTYxy2L7XmsJ4gsFx5LbNrwsmiuWD7QAs7OAYR5S+JG62h6u9iXdsL4I3Bg==","signature_status":"signed_v1","signed_at":"2026-06-19T16:11:55.764842Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.19066","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:640a8ee6132e5ad8f1d1fd7221f0ee1c8608b02488cca82a1295bc225c5cac7e","sha256:b86e801954213b1c186d660b7ddb22b63c4ee8bfd043043c5b6001c26de1e0c3"],"state_sha256":"f05b9b438117345cdb0ccb7dd53614b79684c1caca24c4c525c240209c783911"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2X+ySHr5AO+6PwIMFAEvj7F+PqfeJhbkF52CFMkOIrj3vj7tReHnayAo3Sr1yFQWsOlZlqpoFkPuEre8ndk8Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T23:07:27.391220Z","bundle_sha256":"a16fbe9de1b07c769d8ce5eb203218477eac14a0851ac3cc26f74eaa8654c0e5"}}