{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:GJI7HGSFGUMWHEX2KZJOECNLRD","short_pith_number":"pith:GJI7HGSF","canonical_record":{"source":{"id":"1608.01340","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-08-03T20:26:55Z","cross_cats_sorted":[],"title_canon_sha256":"f223e0754895c165e922bede0700bbb5f7e9478e88e446c13f2ee0549f65c42d","abstract_canon_sha256":"de4533f0bee9f53cf913fa1946e849f14e44ff42347baaa7b6f6ed021b08d807"},"schema_version":"1.0"},"canonical_sha256":"3251f39a4535196392fa5652e209ab88e37a6ed7522f407dbc9576d6fa52e721","source":{"kind":"arxiv","id":"1608.01340","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.01340","created_at":"2026-05-18T00:59:19Z"},{"alias_kind":"arxiv_version","alias_value":"1608.01340v1","created_at":"2026-05-18T00:59:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.01340","created_at":"2026-05-18T00:59:19Z"},{"alias_kind":"pith_short_12","alias_value":"GJI7HGSFGUMW","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"GJI7HGSFGUMWHEX2","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"GJI7HGSF","created_at":"2026-05-18T12:30:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:GJI7HGSFGUMWHEX2KZJOECNLRD","target":"record","payload":{"canonical_record":{"source":{"id":"1608.01340","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-08-03T20:26:55Z","cross_cats_sorted":[],"title_canon_sha256":"f223e0754895c165e922bede0700bbb5f7e9478e88e446c13f2ee0549f65c42d","abstract_canon_sha256":"de4533f0bee9f53cf913fa1946e849f14e44ff42347baaa7b6f6ed021b08d807"},"schema_version":"1.0"},"canonical_sha256":"3251f39a4535196392fa5652e209ab88e37a6ed7522f407dbc9576d6fa52e721","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:59:19.991383Z","signature_b64":"SYLJFMFV4tjU4lcOWPhUP+6t4RnZ+DYLagUpiUcPDmRJs+EDMwwa3DfR7+O6Nxo4UVgo6XQ7WKcRysmXNxKTDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3251f39a4535196392fa5652e209ab88e37a6ed7522f407dbc9576d6fa52e721","last_reissued_at":"2026-05-18T00:59:19.990763Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:59:19.990763Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.01340","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":"2026-05-18T00:59:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ijxQEFmwewcPFjtHsTLANlW2Bv/dUUvSWAg30SdYXF1upUHycNwv4jJr4Rd2BT5MRGJYCmOeJK8iKbmH+AXVCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:54:42.376590Z"},"content_sha256":"d44fffb88cbc25adf2e9d96fbeb84e8142760b9633205cb9751660db189b261c","schema_version":"1.0","event_id":"sha256:d44fffb88cbc25adf2e9d96fbeb84e8142760b9633205cb9751660db189b261c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:GJI7HGSFGUMWHEX2KZJOECNLRD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Geomorphologic Mapping of Titan's Polar Terrains: Constraining Surface Processes and Landscape Evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Alan Howard, Alexander Hayes, Catherine Neish, Charles Wood, Charlie Bristow, David Williams, Elizabeth Turtle, Ellen Stofan, Jason Barnes, Jason Hofgartner, Jason Soderblom, Jeff Moore, Jonathan Lunine, Marco Mastrogiuseppe, Michael Malaska, Oliver White, Ralph Lorenz, Randy Kirk, Rosaly Lopes, Samuel Birch, William Dietrich","submitted_at":"2016-08-03T20:26:55Z","abstract_excerpt":"We present a geomorphologic map of Titan's polar terrains. The map was generated from a combination of Cassini Synthetic Aperture Radar (SAR) and Imaging Science Subsystem imaging products, as well as altimetry, SARTopo and radargrammetry topographic datasets. In combining imagery with topographic data, our geomorphologic map reveals a stratigraphic sequence from which we infer process interactions between units. In mapping both polar regions with the same geomorphologic units, we conclude that processes that formed the terrains of the north polar region also acted to form the landscape we obs"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.01340","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":""},"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":"2026-05-18T00:59:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ChOupQRKY7Ixb9r1vOHydqrRNu4teWhEJa7asB9FnucyttXaa8prGXRaX0L5Y6STdhX5GXXsV4BLyPjVsKvYAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:54:42.376960Z"},"content_sha256":"2f96c609f8eb5fcb9ff0a6a3ef3951e9497b8ef92d0d6acd03486f6e7e823019","schema_version":"1.0","event_id":"sha256:2f96c609f8eb5fcb9ff0a6a3ef3951e9497b8ef92d0d6acd03486f6e7e823019"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GJI7HGSFGUMWHEX2KZJOECNLRD/bundle.json","state_url":"https://pith.science/pith/GJI7HGSFGUMWHEX2KZJOECNLRD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GJI7HGSFGUMWHEX2KZJOECNLRD/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":"2026-05-27T21:54:42Z","links":{"resolver":"https://pith.science/pith/GJI7HGSFGUMWHEX2KZJOECNLRD","bundle":"https://pith.science/pith/GJI7HGSFGUMWHEX2KZJOECNLRD/bundle.json","state":"https://pith.science/pith/GJI7HGSFGUMWHEX2KZJOECNLRD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GJI7HGSFGUMWHEX2KZJOECNLRD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:GJI7HGSFGUMWHEX2KZJOECNLRD","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":"de4533f0bee9f53cf913fa1946e849f14e44ff42347baaa7b6f6ed021b08d807","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-08-03T20:26:55Z","title_canon_sha256":"f223e0754895c165e922bede0700bbb5f7e9478e88e446c13f2ee0549f65c42d"},"schema_version":"1.0","source":{"id":"1608.01340","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.01340","created_at":"2026-05-18T00:59:19Z"},{"alias_kind":"arxiv_version","alias_value":"1608.01340v1","created_at":"2026-05-18T00:59:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.01340","created_at":"2026-05-18T00:59:19Z"},{"alias_kind":"pith_short_12","alias_value":"GJI7HGSFGUMW","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"GJI7HGSFGUMWHEX2","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"GJI7HGSF","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:2f96c609f8eb5fcb9ff0a6a3ef3951e9497b8ef92d0d6acd03486f6e7e823019","target":"graph","created_at":"2026-05-18T00:59:19Z","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"},"paper":{"abstract_excerpt":"We present a geomorphologic map of Titan's polar terrains. The map was generated from a combination of Cassini Synthetic Aperture Radar (SAR) and Imaging Science Subsystem imaging products, as well as altimetry, SARTopo and radargrammetry topographic datasets. In combining imagery with topographic data, our geomorphologic map reveals a stratigraphic sequence from which we infer process interactions between units. In mapping both polar regions with the same geomorphologic units, we conclude that processes that formed the terrains of the north polar region also acted to form the landscape we obs","authors_text":"Alan Howard, Alexander Hayes, Catherine Neish, Charles Wood, Charlie Bristow, David Williams, Elizabeth Turtle, Ellen Stofan, Jason Barnes, Jason Hofgartner, Jason Soderblom, Jeff Moore, Jonathan Lunine, Marco Mastrogiuseppe, Michael Malaska, Oliver White, Ralph Lorenz, Randy Kirk, Rosaly Lopes, Samuel Birch, William Dietrich","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-08-03T20:26:55Z","title":"Geomorphologic Mapping of Titan's Polar Terrains: Constraining Surface Processes and Landscape Evolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.01340","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:d44fffb88cbc25adf2e9d96fbeb84e8142760b9633205cb9751660db189b261c","target":"record","created_at":"2026-05-18T00:59:19Z","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":"de4533f0bee9f53cf913fa1946e849f14e44ff42347baaa7b6f6ed021b08d807","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-08-03T20:26:55Z","title_canon_sha256":"f223e0754895c165e922bede0700bbb5f7e9478e88e446c13f2ee0549f65c42d"},"schema_version":"1.0","source":{"id":"1608.01340","kind":"arxiv","version":1}},"canonical_sha256":"3251f39a4535196392fa5652e209ab88e37a6ed7522f407dbc9576d6fa52e721","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3251f39a4535196392fa5652e209ab88e37a6ed7522f407dbc9576d6fa52e721","first_computed_at":"2026-05-18T00:59:19.990763Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:59:19.990763Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SYLJFMFV4tjU4lcOWPhUP+6t4RnZ+DYLagUpiUcPDmRJs+EDMwwa3DfR7+O6Nxo4UVgo6XQ7WKcRysmXNxKTDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:59:19.991383Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.01340","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d44fffb88cbc25adf2e9d96fbeb84e8142760b9633205cb9751660db189b261c","sha256:2f96c609f8eb5fcb9ff0a6a3ef3951e9497b8ef92d0d6acd03486f6e7e823019"],"state_sha256":"6138067d649673582b85f162d00191116df748982fb7cd36b8aeebab7c5e712e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QlmfbSt/7BweR6cYW1YKO2CmiGofK6clsV75R4ZrNFS4ckV36C7os64y+S4xtqVtXYdtBMmYx+BmKSKIjCkZAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T21:54:42.379215Z","bundle_sha256":"4b094e96543a972223b4b303390728c1b698a12ee91e273b9a9ac850956380c6"}}