{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:NQZZCEY5P7MZLRLZB5NCAXZO4A","short_pith_number":"pith:NQZZCEY5","canonical_record":{"source":{"id":"2607.04982","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.geo-ph","submitted_at":"2026-07-06T12:18:13Z","cross_cats_sorted":["cs.AI","cs.LG"],"title_canon_sha256":"987f4c7ccc79d4f740d57241a5233ea62e5dc47e055a7eb9a009db207e2cea12","abstract_canon_sha256":"7d8a60b8045f0517057c491e43010defdfb53711e472fa0ce64fe40b378129d8"},"schema_version":"1.0"},"canonical_sha256":"6c3391131d7fd995c5790f5a205f2ee0394b73079dce13e93ce999fa6d1b4da3","source":{"kind":"arxiv","id":"2607.04982","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.04982","created_at":"2026-07-07T02:20:16Z"},{"alias_kind":"arxiv_version","alias_value":"2607.04982v1","created_at":"2026-07-07T02:20:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.04982","created_at":"2026-07-07T02:20:16Z"},{"alias_kind":"pith_short_12","alias_value":"NQZZCEY5P7MZ","created_at":"2026-07-07T02:20:16Z"},{"alias_kind":"pith_short_16","alias_value":"NQZZCEY5P7MZLRLZ","created_at":"2026-07-07T02:20:16Z"},{"alias_kind":"pith_short_8","alias_value":"NQZZCEY5","created_at":"2026-07-07T02:20:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:NQZZCEY5P7MZLRLZB5NCAXZO4A","target":"record","payload":{"canonical_record":{"source":{"id":"2607.04982","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.geo-ph","submitted_at":"2026-07-06T12:18:13Z","cross_cats_sorted":["cs.AI","cs.LG"],"title_canon_sha256":"987f4c7ccc79d4f740d57241a5233ea62e5dc47e055a7eb9a009db207e2cea12","abstract_canon_sha256":"7d8a60b8045f0517057c491e43010defdfb53711e472fa0ce64fe40b378129d8"},"schema_version":"1.0"},"canonical_sha256":"6c3391131d7fd995c5790f5a205f2ee0394b73079dce13e93ce999fa6d1b4da3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-07T02:20:16.697513Z","signature_b64":"HsZEs79kOI+rsfarLBHDciRbs6K3Hc5nw/HeYdDz7cfDZoYTchLSjiyC2fPXpSRkcphK5LWY1P1bHsvtPCuzBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6c3391131d7fd995c5790f5a205f2ee0394b73079dce13e93ce999fa6d1b4da3","last_reissued_at":"2026-07-07T02:20:16.696936Z","signature_status":"signed_v1","first_computed_at":"2026-07-07T02:20:16.696936Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.04982","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":"2026-07-07T02:20:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nLcYJfMSM+I3550Z5BvubYITn48Oi/Er0/IbX4XnBmxr3dibqG/smNnw2zXh8yNpvXqXZ3zwT8sMHn41sRcYAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T19:27:31.013411Z"},"content_sha256":"cc4a6ae9fafba01514e6c8d96780745282f73932e30ce897f3428fd28174d38e","schema_version":"1.0","event_id":"sha256:cc4a6ae9fafba01514e6c8d96780745282f73932e30ce897f3428fd28174d38e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:NQZZCEY5P7MZLRLZB5NCAXZO4A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Joint Velocity Slope Diffusion Prior for Structurally Constrained Velocity Model Building","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.AI","cs.LG"],"primary_cat":"physics.geo-ph","authors_text":"Francesco Brandolin, Tariq Alkhalifah","submitted_at":"2026-07-06T12:18:13Z","abstract_excerpt":"High-resolution velocity models are crucial for reservoir characterization and subsurface delineation. However, the band limited nature of our surface recorded data limits resolution. Utilizing well measurements to enhance the resolution of our subsurface models is an important objective. To this end, we present a diffusion-guided framework for structurally preconditioned velocity-model reconstruction from sparse well-log information. The proposed approach combines plane-wave PDE regularization, structurally preconditioned inversion, and measurement-guided diffusion posterior sampling within a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.04982","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/2607.04982/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":"2026-07-07T02:20:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gEr0GvslWrvqmfwzgeg/oub6QaziQuQTgBnzioa0SxPtKFOjTNCiJtSU0uyBHyeyuZVSwWTigoWVak3+kj9fCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T19:27:31.013911Z"},"content_sha256":"be0e03f859bf42aed3e9883a045e42689641efe0de09382a54326b73fc99c48c","schema_version":"1.0","event_id":"sha256:be0e03f859bf42aed3e9883a045e42689641efe0de09382a54326b73fc99c48c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NQZZCEY5P7MZLRLZB5NCAXZO4A/bundle.json","state_url":"https://pith.science/pith/NQZZCEY5P7MZLRLZB5NCAXZO4A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NQZZCEY5P7MZLRLZB5NCAXZO4A/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":"2026-08-09T19:27:31Z","links":{"resolver":"https://pith.science/pith/NQZZCEY5P7MZLRLZB5NCAXZO4A","bundle":"https://pith.science/pith/NQZZCEY5P7MZLRLZB5NCAXZO4A/bundle.json","state":"https://pith.science/pith/NQZZCEY5P7MZLRLZB5NCAXZO4A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NQZZCEY5P7MZLRLZB5NCAXZO4A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:NQZZCEY5P7MZLRLZB5NCAXZO4A","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":"7d8a60b8045f0517057c491e43010defdfb53711e472fa0ce64fe40b378129d8","cross_cats_sorted":["cs.AI","cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.geo-ph","submitted_at":"2026-07-06T12:18:13Z","title_canon_sha256":"987f4c7ccc79d4f740d57241a5233ea62e5dc47e055a7eb9a009db207e2cea12"},"schema_version":"1.0","source":{"id":"2607.04982","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.04982","created_at":"2026-07-07T02:20:16Z"},{"alias_kind":"arxiv_version","alias_value":"2607.04982v1","created_at":"2026-07-07T02:20:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.04982","created_at":"2026-07-07T02:20:16Z"},{"alias_kind":"pith_short_12","alias_value":"NQZZCEY5P7MZ","created_at":"2026-07-07T02:20:16Z"},{"alias_kind":"pith_short_16","alias_value":"NQZZCEY5P7MZLRLZ","created_at":"2026-07-07T02:20:16Z"},{"alias_kind":"pith_short_8","alias_value":"NQZZCEY5","created_at":"2026-07-07T02:20:16Z"}],"graph_snapshots":[{"event_id":"sha256:be0e03f859bf42aed3e9883a045e42689641efe0de09382a54326b73fc99c48c","target":"graph","created_at":"2026-07-07T02:20:16Z","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/2607.04982/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"High-resolution velocity models are crucial for reservoir characterization and subsurface delineation. However, the band limited nature of our surface recorded data limits resolution. Utilizing well measurements to enhance the resolution of our subsurface models is an important objective. To this end, we present a diffusion-guided framework for structurally preconditioned velocity-model reconstruction from sparse well-log information. The proposed approach combines plane-wave PDE regularization, structurally preconditioned inversion, and measurement-guided diffusion posterior sampling within a","authors_text":"Francesco Brandolin, Tariq Alkhalifah","cross_cats":["cs.AI","cs.LG"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.geo-ph","submitted_at":"2026-07-06T12:18:13Z","title":"Joint Velocity Slope Diffusion Prior for Structurally Constrained Velocity Model Building"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.04982","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:cc4a6ae9fafba01514e6c8d96780745282f73932e30ce897f3428fd28174d38e","target":"record","created_at":"2026-07-07T02:20:16Z","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":"7d8a60b8045f0517057c491e43010defdfb53711e472fa0ce64fe40b378129d8","cross_cats_sorted":["cs.AI","cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.geo-ph","submitted_at":"2026-07-06T12:18:13Z","title_canon_sha256":"987f4c7ccc79d4f740d57241a5233ea62e5dc47e055a7eb9a009db207e2cea12"},"schema_version":"1.0","source":{"id":"2607.04982","kind":"arxiv","version":1}},"canonical_sha256":"6c3391131d7fd995c5790f5a205f2ee0394b73079dce13e93ce999fa6d1b4da3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6c3391131d7fd995c5790f5a205f2ee0394b73079dce13e93ce999fa6d1b4da3","first_computed_at":"2026-07-07T02:20:16.696936Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-07T02:20:16.696936Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HsZEs79kOI+rsfarLBHDciRbs6K3Hc5nw/HeYdDz7cfDZoYTchLSjiyC2fPXpSRkcphK5LWY1P1bHsvtPCuzBQ==","signature_status":"signed_v1","signed_at":"2026-07-07T02:20:16.697513Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.04982","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cc4a6ae9fafba01514e6c8d96780745282f73932e30ce897f3428fd28174d38e","sha256:be0e03f859bf42aed3e9883a045e42689641efe0de09382a54326b73fc99c48c"],"state_sha256":"970d175e252fe842cab8fbef4d0535ae680f0afc7ed4737c021049df29ddfcd8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GJlL0TK/ktX0hkXNFUub8+KkhbFOnagv8fwUG7sE1kAbZzYfAc/2N3CCed4KXYFK5yaAQJ48e2gKVZVgvSjYAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T19:27:31.019283Z","bundle_sha256":"e5d645582545df7c3324c7a4e01499fdbdf2f5da6a3b4fc1f635f2653d66dbe7"}}