{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:XDSY2BXRMWSWUBPJX5DFQUGAZJ","short_pith_number":"pith:XDSY2BXR","canonical_record":{"source":{"id":"1704.05143","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2017-04-17T22:50:04Z","cross_cats_sorted":[],"title_canon_sha256":"b35a291a7aeb703e04c9bf15504b5e49fb9e6559fb8543785ca84a8a40dacb8f","abstract_canon_sha256":"f25f7be064c5d05f6d29f98a59e792a1809ff1b1a44ac7c12599cf0283c99f3d"},"schema_version":"1.0"},"canonical_sha256":"b8e58d06f165a56a05e9bf465850c0ca718043acd695322eaa4c30eb5c2d6cb3","source":{"kind":"arxiv","id":"1704.05143","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.05143","created_at":"2026-05-17T23:54:03Z"},{"alias_kind":"arxiv_version","alias_value":"1704.05143v2","created_at":"2026-05-17T23:54:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.05143","created_at":"2026-05-17T23:54:03Z"},{"alias_kind":"pith_short_12","alias_value":"XDSY2BXRMWSW","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"XDSY2BXRMWSWUBPJ","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"XDSY2BXR","created_at":"2026-05-18T12:31:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:XDSY2BXRMWSWUBPJX5DFQUGAZJ","target":"record","payload":{"canonical_record":{"source":{"id":"1704.05143","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2017-04-17T22:50:04Z","cross_cats_sorted":[],"title_canon_sha256":"b35a291a7aeb703e04c9bf15504b5e49fb9e6559fb8543785ca84a8a40dacb8f","abstract_canon_sha256":"f25f7be064c5d05f6d29f98a59e792a1809ff1b1a44ac7c12599cf0283c99f3d"},"schema_version":"1.0"},"canonical_sha256":"b8e58d06f165a56a05e9bf465850c0ca718043acd695322eaa4c30eb5c2d6cb3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:03.356833Z","signature_b64":"COkaUkOQm4EvhtotiVks0RSsW9gYEiZdkpcpexdbTJ9st6dg6olvEjXvbD5aPxCvZdjJSDNbMl0CbYGYB10wAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b8e58d06f165a56a05e9bf465850c0ca718043acd695322eaa4c30eb5c2d6cb3","last_reissued_at":"2026-05-17T23:54:03.356200Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:03.356200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.05143","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:54:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1LPkNwrg4p88MRxHYneYIZ26/w5M3t1/aPl5IDrmcsgnwEFOHpikl/mf2M6DCKJi6SwOInoZS6PdmarlIJBmBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T18:39:50.392561Z"},"content_sha256":"abbbf0e45ece95b1c74caee147aaec9317ba44042a59ef1735204e804272ed33","schema_version":"1.0","event_id":"sha256:abbbf0e45ece95b1c74caee147aaec9317ba44042a59ef1735204e804272ed33"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:XDSY2BXRMWSWUBPJX5DFQUGAZJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Emergence of Canalization and Evolvability in an Open-Ended, Interactive Evolutionary System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.NE","authors_text":"Jeff Clune, Joost Huizinga, Kenneth O. Stanley","submitted_at":"2017-04-17T22:50:04Z","abstract_excerpt":"Natural evolution has produced a tremendous diversity of functional organisms. Many believe an essential component of this process was the evolution of evolvability, whereby evolution speeds up its ability to innovate by generating a more adaptive pool of offspring. One hypothesized mechanism for evolvability is developmental canalization, wherein certain dimensions of variation become more likely to be traversed and others are prevented from being explored (e.g. offspring tend to have similarly sized legs, and mutations affect the length of both legs, not each leg individually). While ubiquit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.05143","kind":"arxiv","version":2},"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":"2026-05-17T23:54:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TmeymJZnxtYZwpb+DQu+iBw3/+mbow/5gEwU0YXA1D0BpYn/h++l7GFehdGNH4VqytI6A2Lj2eafeGLphGyPCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T18:39:50.392907Z"},"content_sha256":"727545a7bffd9896ba47914c88617df1834be7a7532719c8a776cf8e3178405a","schema_version":"1.0","event_id":"sha256:727545a7bffd9896ba47914c88617df1834be7a7532719c8a776cf8e3178405a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XDSY2BXRMWSWUBPJX5DFQUGAZJ/bundle.json","state_url":"https://pith.science/pith/XDSY2BXRMWSWUBPJX5DFQUGAZJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XDSY2BXRMWSWUBPJX5DFQUGAZJ/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":"2026-06-03T18:39:50Z","links":{"resolver":"https://pith.science/pith/XDSY2BXRMWSWUBPJX5DFQUGAZJ","bundle":"https://pith.science/pith/XDSY2BXRMWSWUBPJX5DFQUGAZJ/bundle.json","state":"https://pith.science/pith/XDSY2BXRMWSWUBPJX5DFQUGAZJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XDSY2BXRMWSWUBPJX5DFQUGAZJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:XDSY2BXRMWSWUBPJX5DFQUGAZJ","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":"f25f7be064c5d05f6d29f98a59e792a1809ff1b1a44ac7c12599cf0283c99f3d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2017-04-17T22:50:04Z","title_canon_sha256":"b35a291a7aeb703e04c9bf15504b5e49fb9e6559fb8543785ca84a8a40dacb8f"},"schema_version":"1.0","source":{"id":"1704.05143","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.05143","created_at":"2026-05-17T23:54:03Z"},{"alias_kind":"arxiv_version","alias_value":"1704.05143v2","created_at":"2026-05-17T23:54:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.05143","created_at":"2026-05-17T23:54:03Z"},{"alias_kind":"pith_short_12","alias_value":"XDSY2BXRMWSW","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"XDSY2BXRMWSWUBPJ","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"XDSY2BXR","created_at":"2026-05-18T12:31:53Z"}],"graph_snapshots":[{"event_id":"sha256:727545a7bffd9896ba47914c88617df1834be7a7532719c8a776cf8e3178405a","target":"graph","created_at":"2026-05-17T23:54:03Z","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":"Natural evolution has produced a tremendous diversity of functional organisms. Many believe an essential component of this process was the evolution of evolvability, whereby evolution speeds up its ability to innovate by generating a more adaptive pool of offspring. One hypothesized mechanism for evolvability is developmental canalization, wherein certain dimensions of variation become more likely to be traversed and others are prevented from being explored (e.g. offspring tend to have similarly sized legs, and mutations affect the length of both legs, not each leg individually). While ubiquit","authors_text":"Jeff Clune, Joost Huizinga, Kenneth O. Stanley","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2017-04-17T22:50:04Z","title":"The Emergence of Canalization and Evolvability in an Open-Ended, Interactive Evolutionary System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.05143","kind":"arxiv","version":2},"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:abbbf0e45ece95b1c74caee147aaec9317ba44042a59ef1735204e804272ed33","target":"record","created_at":"2026-05-17T23:54:03Z","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":"f25f7be064c5d05f6d29f98a59e792a1809ff1b1a44ac7c12599cf0283c99f3d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2017-04-17T22:50:04Z","title_canon_sha256":"b35a291a7aeb703e04c9bf15504b5e49fb9e6559fb8543785ca84a8a40dacb8f"},"schema_version":"1.0","source":{"id":"1704.05143","kind":"arxiv","version":2}},"canonical_sha256":"b8e58d06f165a56a05e9bf465850c0ca718043acd695322eaa4c30eb5c2d6cb3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b8e58d06f165a56a05e9bf465850c0ca718043acd695322eaa4c30eb5c2d6cb3","first_computed_at":"2026-05-17T23:54:03.356200Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:03.356200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"COkaUkOQm4EvhtotiVks0RSsW9gYEiZdkpcpexdbTJ9st6dg6olvEjXvbD5aPxCvZdjJSDNbMl0CbYGYB10wAA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:03.356833Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.05143","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:abbbf0e45ece95b1c74caee147aaec9317ba44042a59ef1735204e804272ed33","sha256:727545a7bffd9896ba47914c88617df1834be7a7532719c8a776cf8e3178405a"],"state_sha256":"5f22705c1428458dacd2799dda46a2c07aa4b24e4503b039ef21a66b75236189"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VenPCZjK9LOXirq8ZN3DcBhRVuRQMip79Rqm2xZ1FIEaHO/CldkOQ9dbDdNFwirh+dV5XdA9+HezplTZ2X2/BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T18:39:50.394791Z","bundle_sha256":"ca744b12e4b12384eba79e1aecc526dff6895f349438f47e42bd2612df6638c0"}}