{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:2NRJTSKODSTIYW7F2H7IUX77D3","short_pith_number":"pith:2NRJTSKO","canonical_record":{"source":{"id":"1601.06764","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"q-bio.BM","submitted_at":"2016-01-25T20:42:23Z","cross_cats_sorted":[],"title_canon_sha256":"2f2eef354dc9091b32534eb6fed989b38957d44a1f2cc1fdf6326a831540bcee","abstract_canon_sha256":"0526fad4e79602cff522ae8444196231e141152ba417e24a0ab7e7836ec8af78"},"schema_version":"1.0"},"canonical_sha256":"d36299c94e1ca68c5be5d1fe8a5fff1ed9711410696b9b7235649f3f55b589e0","source":{"kind":"arxiv","id":"1601.06764","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06764","created_at":"2026-05-18T01:19:53Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06764v1","created_at":"2026-05-18T01:19:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06764","created_at":"2026-05-18T01:19:53Z"},{"alias_kind":"pith_short_12","alias_value":"2NRJTSKODSTI","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"2NRJTSKODSTIYW7F","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"2NRJTSKO","created_at":"2026-05-18T12:29:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:2NRJTSKODSTIYW7F2H7IUX77D3","target":"record","payload":{"canonical_record":{"source":{"id":"1601.06764","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"q-bio.BM","submitted_at":"2016-01-25T20:42:23Z","cross_cats_sorted":[],"title_canon_sha256":"2f2eef354dc9091b32534eb6fed989b38957d44a1f2cc1fdf6326a831540bcee","abstract_canon_sha256":"0526fad4e79602cff522ae8444196231e141152ba417e24a0ab7e7836ec8af78"},"schema_version":"1.0"},"canonical_sha256":"d36299c94e1ca68c5be5d1fe8a5fff1ed9711410696b9b7235649f3f55b589e0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:53.070443Z","signature_b64":"igWpWe6lTUYmQuSx9w+T5PEEuvxauk8tkNVVXkgtHKdTuzycpcqVG+S9AMqgPwIvHlTPP9XR38ap6UHNhzHEDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d36299c94e1ca68c5be5d1fe8a5fff1ed9711410696b9b7235649f3f55b589e0","last_reissued_at":"2026-05-18T01:19:53.069922Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:53.069922Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.06764","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":"2026-05-18T01:19:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qp7BgMQNatoNKxL9/GmNQgmqV6UmADb36nXOIXvKzrPAMLKdhiBXWadarSfSJza1FYsfXkQQAdaNvmB7280HCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T14:14:11.531900Z"},"content_sha256":"952a5cb7d3a0df3a07b4faea40e381f8f1cb14e43d68347485beb604c459b71e","schema_version":"1.0","event_id":"sha256:952a5cb7d3a0df3a07b4faea40e381f8f1cb14e43d68347485beb604c459b71e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:2NRJTSKODSTIYW7F2H7IUX77D3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"FreeSASA: An open source C library for solvent accessible surface area calculations","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"q-bio.BM","authors_text":"Simon Mitternacht","submitted_at":"2016-01-25T20:42:23Z","abstract_excerpt":"Calculating solvent accessible surface areas (SASA) is a run-of-the-mill calculation in structural biology. Although there are many programs available for this calculation, there are no free-standing, open-source tools designed for easy tool-chain integration. FreeSASA is an open source C library for SASA calculations that provides both command-line and Python interfaces in addition to its C API. The library implements both Lee and Richards' and Shrake and Rupley's approximations, and is highly configurable to allow the user to control molecular parameters, accuracy and output granularity. It "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06764","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":"2026-05-18T01:19:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"drk5mG6g8UlvUXGMlgVBQgNaK4bQeuLvtQjvYj3vF0h2yZwa1Fu7rv0DX/5jGx8WNmer/v4zbVK+Y/ekfTqQAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T14:14:11.532575Z"},"content_sha256":"8f9d44b458f9b1ede9b52125bd5ed378102b9eed08e13e0954250970737a4b1a","schema_version":"1.0","event_id":"sha256:8f9d44b458f9b1ede9b52125bd5ed378102b9eed08e13e0954250970737a4b1a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2NRJTSKODSTIYW7F2H7IUX77D3/bundle.json","state_url":"https://pith.science/pith/2NRJTSKODSTIYW7F2H7IUX77D3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2NRJTSKODSTIYW7F2H7IUX77D3/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":"2026-05-27T14:14:11Z","links":{"resolver":"https://pith.science/pith/2NRJTSKODSTIYW7F2H7IUX77D3","bundle":"https://pith.science/pith/2NRJTSKODSTIYW7F2H7IUX77D3/bundle.json","state":"https://pith.science/pith/2NRJTSKODSTIYW7F2H7IUX77D3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2NRJTSKODSTIYW7F2H7IUX77D3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:2NRJTSKODSTIYW7F2H7IUX77D3","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":"0526fad4e79602cff522ae8444196231e141152ba417e24a0ab7e7836ec8af78","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"q-bio.BM","submitted_at":"2016-01-25T20:42:23Z","title_canon_sha256":"2f2eef354dc9091b32534eb6fed989b38957d44a1f2cc1fdf6326a831540bcee"},"schema_version":"1.0","source":{"id":"1601.06764","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06764","created_at":"2026-05-18T01:19:53Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06764v1","created_at":"2026-05-18T01:19:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06764","created_at":"2026-05-18T01:19:53Z"},{"alias_kind":"pith_short_12","alias_value":"2NRJTSKODSTI","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"2NRJTSKODSTIYW7F","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"2NRJTSKO","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:8f9d44b458f9b1ede9b52125bd5ed378102b9eed08e13e0954250970737a4b1a","target":"graph","created_at":"2026-05-18T01:19:53Z","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":"Calculating solvent accessible surface areas (SASA) is a run-of-the-mill calculation in structural biology. Although there are many programs available for this calculation, there are no free-standing, open-source tools designed for easy tool-chain integration. FreeSASA is an open source C library for SASA calculations that provides both command-line and Python interfaces in addition to its C API. The library implements both Lee and Richards' and Shrake and Rupley's approximations, and is highly configurable to allow the user to control molecular parameters, accuracy and output granularity. It ","authors_text":"Simon Mitternacht","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"q-bio.BM","submitted_at":"2016-01-25T20:42:23Z","title":"FreeSASA: An open source C library for solvent accessible surface area calculations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06764","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":"sha256:952a5cb7d3a0df3a07b4faea40e381f8f1cb14e43d68347485beb604c459b71e","target":"record","created_at":"2026-05-18T01:19:53Z","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":"0526fad4e79602cff522ae8444196231e141152ba417e24a0ab7e7836ec8af78","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"q-bio.BM","submitted_at":"2016-01-25T20:42:23Z","title_canon_sha256":"2f2eef354dc9091b32534eb6fed989b38957d44a1f2cc1fdf6326a831540bcee"},"schema_version":"1.0","source":{"id":"1601.06764","kind":"arxiv","version":1}},"canonical_sha256":"d36299c94e1ca68c5be5d1fe8a5fff1ed9711410696b9b7235649f3f55b589e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d36299c94e1ca68c5be5d1fe8a5fff1ed9711410696b9b7235649f3f55b589e0","first_computed_at":"2026-05-18T01:19:53.069922Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:53.069922Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"igWpWe6lTUYmQuSx9w+T5PEEuvxauk8tkNVVXkgtHKdTuzycpcqVG+S9AMqgPwIvHlTPP9XR38ap6UHNhzHEDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:53.070443Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.06764","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:952a5cb7d3a0df3a07b4faea40e381f8f1cb14e43d68347485beb604c459b71e","sha256:8f9d44b458f9b1ede9b52125bd5ed378102b9eed08e13e0954250970737a4b1a"],"state_sha256":"9e5d3da6b2abb2f434593f8fda635a6551c2f77013a7b7d56836c1f88edd809f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3PQmXxlR/VjgkXkPI1kRt4Fp3DITju+0Dse0qwA++VAowNCGwVTXXn6cRl01mQnHz23WTcLFWB9s3gbIVSUWBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T14:14:11.535632Z","bundle_sha256":"22655587ff51fd8f92d821aa8b38ec3c8d5f37ca7c732de0b7ffb8826e62c70d"}}