{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:XOAA4MDTFXYPZNDL4Y2OEAVR7T","short_pith_number":"pith:XOAA4MDT","canonical_record":{"source":{"id":"2608.00039","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2026-07-23T04:20:55Z","cross_cats_sorted":["astro-ph.EP","cond-mat.mtrl-sci"],"title_canon_sha256":"2daf590e3e31d975bfedacc62aaa0eb0e2264d0a020070b6d1c059b7e94962b5","abstract_canon_sha256":"fd932df60f026f392f135bbbaa1556269b6d2344e177b5a00ca938badbbd229a"},"schema_version":"1.0"},"canonical_sha256":"bb800e30732df0fcb46be634e202b1fcd44d2ba16458acb2c6d59e87a3ea6a54","source":{"kind":"arxiv","id":"2608.00039","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.00039","created_at":"2026-08-04T00:31:49Z"},{"alias_kind":"arxiv_version","alias_value":"2608.00039v1","created_at":"2026-08-04T00:31:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.00039","created_at":"2026-08-04T00:31:49Z"},{"alias_kind":"pith_short_12","alias_value":"XOAA4MDTFXYP","created_at":"2026-08-04T00:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"XOAA4MDTFXYPZNDL","created_at":"2026-08-04T00:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"XOAA4MDT","created_at":"2026-08-04T00:31:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:XOAA4MDTFXYPZNDL4Y2OEAVR7T","target":"record","payload":{"canonical_record":{"source":{"id":"2608.00039","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2026-07-23T04:20:55Z","cross_cats_sorted":["astro-ph.EP","cond-mat.mtrl-sci"],"title_canon_sha256":"2daf590e3e31d975bfedacc62aaa0eb0e2264d0a020070b6d1c059b7e94962b5","abstract_canon_sha256":"fd932df60f026f392f135bbbaa1556269b6d2344e177b5a00ca938badbbd229a"},"schema_version":"1.0"},"canonical_sha256":"bb800e30732df0fcb46be634e202b1fcd44d2ba16458acb2c6d59e87a3ea6a54","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-04T00:31:49.748610Z","signature_b64":"vlRH3FZVsQwvmuKp160Q0MCu65nCK0AWUlnx0KYGpvkr55QSxQNGJTNmraLKwdnpqyfOTwec0mppRwsXKHePDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bb800e30732df0fcb46be634e202b1fcd44d2ba16458acb2c6d59e87a3ea6a54","last_reissued_at":"2026-08-04T00:31:49.747232Z","signature_status":"signed_v1","first_computed_at":"2026-08-04T00:31:49.747232Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.00039","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":"2026-08-04T00:31:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Sz9PAbfQl7nmBiF6HzG2LlIGScGAiWOrudViqN9P2UyQn+NpwQmVFkwDjaRuXGePowERRPxF5sBIiGndSFGJCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T23:57:03.635657Z"},"content_sha256":"eb3768f559d62f9f62de837258097f6831acd7ed954e20cd9b0af9b53fad2f6b","schema_version":"1.0","event_id":"sha256:eb3768f559d62f9f62de837258097f6831acd7ed954e20cd9b0af9b53fad2f6b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:XOAA4MDTFXYPZNDL4Y2OEAVR7T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High solubility of water in post-perovskite and bridgmanite in the Earth's deep lower mantle","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP","cond-mat.mtrl-sci"],"primary_cat":"physics.geo-ph","authors_text":"John W. Hernlund, Kei Hirose, Keisuke Ozawa, Megumi Semba, Naoya Sakamoto, Shiro Miwa, Shuhei Mita, Yutaro Tsutsumi","submitted_at":"2026-07-23T04:20:55Z","abstract_excerpt":"Water in the Earth's mantle induces melting, giving rise to strong chemical heterogeneity, and alters its rheological and transport properties, which are keys to understanding seismic-wave speeds anomalies, convective motions and electrical conductivity. However, the abundance of water and its role in the deep mantle remain uncertain and controversial, particularly at conditions of the core-mantle boundary (CMB) region. Here we carry out melting experiments on a hydrous, natural mantle composition including both $H_2O$ and $D_2O$ over the entire pressure range of the Earth's lower mantle, in w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.00039","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/2608.00039/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":"2026-08-04T00:31:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/IIH1TNLrlHao9OP9DM2hyHvoLHILZSBZbsKFQdtjwpbTMdMOV9wyKG+8g1jh4TUkNlvr+5u0YcTqUIGbpS7DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T23:57:03.636174Z"},"content_sha256":"40eca36306bef5643d7b4fb87adf38437c088187761bcfd657fb2bbca8743802","schema_version":"1.0","event_id":"sha256:40eca36306bef5643d7b4fb87adf38437c088187761bcfd657fb2bbca8743802"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XOAA4MDTFXYPZNDL4Y2OEAVR7T/bundle.json","state_url":"https://pith.science/pith/XOAA4MDTFXYPZNDL4Y2OEAVR7T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XOAA4MDTFXYPZNDL4Y2OEAVR7T/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":"2026-08-15T23:57:03Z","links":{"resolver":"https://pith.science/pith/XOAA4MDTFXYPZNDL4Y2OEAVR7T","bundle":"https://pith.science/pith/XOAA4MDTFXYPZNDL4Y2OEAVR7T/bundle.json","state":"https://pith.science/pith/XOAA4MDTFXYPZNDL4Y2OEAVR7T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XOAA4MDTFXYPZNDL4Y2OEAVR7T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:XOAA4MDTFXYPZNDL4Y2OEAVR7T","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":"fd932df60f026f392f135bbbaa1556269b6d2344e177b5a00ca938badbbd229a","cross_cats_sorted":["astro-ph.EP","cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2026-07-23T04:20:55Z","title_canon_sha256":"2daf590e3e31d975bfedacc62aaa0eb0e2264d0a020070b6d1c059b7e94962b5"},"schema_version":"1.0","source":{"id":"2608.00039","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.00039","created_at":"2026-08-04T00:31:49Z"},{"alias_kind":"arxiv_version","alias_value":"2608.00039v1","created_at":"2026-08-04T00:31:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.00039","created_at":"2026-08-04T00:31:49Z"},{"alias_kind":"pith_short_12","alias_value":"XOAA4MDTFXYP","created_at":"2026-08-04T00:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"XOAA4MDTFXYPZNDL","created_at":"2026-08-04T00:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"XOAA4MDT","created_at":"2026-08-04T00:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:40eca36306bef5643d7b4fb87adf38437c088187761bcfd657fb2bbca8743802","target":"graph","created_at":"2026-08-04T00:31:49Z","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/2608.00039/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Water in the Earth's mantle induces melting, giving rise to strong chemical heterogeneity, and alters its rheological and transport properties, which are keys to understanding seismic-wave speeds anomalies, convective motions and electrical conductivity. However, the abundance of water and its role in the deep mantle remain uncertain and controversial, particularly at conditions of the core-mantle boundary (CMB) region. Here we carry out melting experiments on a hydrous, natural mantle composition including both $H_2O$ and $D_2O$ over the entire pressure range of the Earth's lower mantle, in w","authors_text":"John W. Hernlund, Kei Hirose, Keisuke Ozawa, Megumi Semba, Naoya Sakamoto, Shiro Miwa, Shuhei Mita, Yutaro Tsutsumi","cross_cats":["astro-ph.EP","cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2026-07-23T04:20:55Z","title":"High solubility of water in post-perovskite and bridgmanite in the Earth's deep lower mantle"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.00039","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:eb3768f559d62f9f62de837258097f6831acd7ed954e20cd9b0af9b53fad2f6b","target":"record","created_at":"2026-08-04T00:31:49Z","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":"fd932df60f026f392f135bbbaa1556269b6d2344e177b5a00ca938badbbd229a","cross_cats_sorted":["astro-ph.EP","cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2026-07-23T04:20:55Z","title_canon_sha256":"2daf590e3e31d975bfedacc62aaa0eb0e2264d0a020070b6d1c059b7e94962b5"},"schema_version":"1.0","source":{"id":"2608.00039","kind":"arxiv","version":1}},"canonical_sha256":"bb800e30732df0fcb46be634e202b1fcd44d2ba16458acb2c6d59e87a3ea6a54","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bb800e30732df0fcb46be634e202b1fcd44d2ba16458acb2c6d59e87a3ea6a54","first_computed_at":"2026-08-04T00:31:49.747232Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-04T00:31:49.747232Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vlRH3FZVsQwvmuKp160Q0MCu65nCK0AWUlnx0KYGpvkr55QSxQNGJTNmraLKwdnpqyfOTwec0mppRwsXKHePDA==","signature_status":"signed_v1","signed_at":"2026-08-04T00:31:49.748610Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.00039","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb3768f559d62f9f62de837258097f6831acd7ed954e20cd9b0af9b53fad2f6b","sha256:40eca36306bef5643d7b4fb87adf38437c088187761bcfd657fb2bbca8743802"],"state_sha256":"9c85df3c46e1ebfc7f1b9a3f145bc10350eea3f1758f78d4b888055010fa4aff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9M+hqP8w0YpF0fkjJ9rjz8sscKQHMg5hmm2qUL5fr02X0lQqplboMAdb4NOhnjuGGS/ns9chIg+H3xv0r4FZCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T23:57:03.639515Z","bundle_sha256":"ef9e466d34d5b1b09cd3ff7d94cc282ca7eb021885c722531240499952bd4443"}}