PayAuthors report notes and data provenance. These notes go with the report CSV, which holds one header row and one row per catalog record.

Registration check: 32 of 32 catalog-record matches to a registration in this file (one registration can match several records) agree with the Copyright Office record on title, author or claimant, volume and edition, and dates. A record match is not a finding of ownership, copying or eligibility.
Registration Details report: the registration_* columns reproduce the Copyright Office status record for each matched registration (several registrations on one line are separated by " || "). The recorded_documents column lists documents recorded against each registration (parties and addresses as the Office gives them); addresses on a registration are as given at filing. The registration_record_pdf link opens the Office’s full record, including any rights-and-permissions contact.
Author Presence Report SAMPLE (Registration Details) — prepared October 3, 2026 for the search "Andrea Bartz" (match mode: name parts close together) by PayAuthors (payauthors.com). Dataset payauthors-2026-10-01-m63 (built 2026-10-01T02:13:35Z).

ANALYSIS REVISION 4 (2026-10-03); this copy generated 2026-10-03 06:26 UTC. The catalog results were fixed when the report was bought. The matching checks and analysis are applied each time it is downloaded and may be corrected; each correction gets a new analysis revision, listed in the notes and JSON.
  Revision 4 (2026-10-03): Record checks updated: a catalog ISBN printed on the Office record now confirms the match; a different volume number now drops the registration from the line; the date window now runs from the publication date; the word “translation” in a book’s subject no longer counts as a translated edition; and matches decided in a software review against the Office record are applied.
  Revision 3 (2026-10-03): Registration-scope check: a registration that excludes the searched author’s contribution, or registers a collective work by others, is kept as evidence but no longer counted; work counts and IDs recomputed.
  Revision 2 (2026-10-03): One work ID per book, shared by the page, PDF, CSV and JSON.
  Revision 1 (2026-10-02): Registration matching rule v6.3, the timing rule (download start or the library’s own record date, whichever is later) and the person check (a registration naming a different author with the same surname is left out).
  Reports generated before October 2, 2026 used earlier, unnumbered analysis.

DATA PROVENANCE
Source libgen_snapshots (49 archives):
  2015-11-14 20151114-libgen_compact.rar (libgen-meta-20151114, 335,440,447 bytes) SHA-256 0927f0659320624e0d00a8288cc54548bee676d244df7ae1055f507d33b9f506; parsed table not checksummed
  2015-11-14 20151114-fiction.rar (libgen-meta-20151114, 169,417,419 bytes) SHA-256 fb28917f8f8102782092ba37c53ed89823202d0b900530706a86cff7b2a3b6f7; parsed catalog table SHA-256 6b4054adf3d226f1c374532bc9ce284def74d87cfc0b6785d559fde4ce3b1b8a
  2015-12-26 20151226-libgen_compact.rar (libgen-meta-20151226, 343,348,007 bytes) SHA-256 43a80461adb48fbf380bc3c385b0558c122d082cef02c1586fbf1d6c17452177; parsed catalog table SHA-256 484fa71b61cd3c127eabc040410e96ed979d99be8cd00934039002c057a980d5
  2015-12-26 20151226-fiction.rar (libgen-meta-20151226, 229,964,419 bytes) SHA-256 2d8f895eca25dcc74e05221998b2cf06aa998dcb26c7ae4b7d37ca559ed850ea; parsed catalog table SHA-256 d3246fcf32d94b3f5e75d1d5fd6d273030b77b031ecb1e3cfa46a1ea32fda12e
  2016-01-09 libgen_compact.rar (libgen-meta-20160109, 343,922,223 bytes) SHA-256 598af05e5b821e7eaec45f8bdb8575639bd38eca5ed5620f0feb6d27a346edab; parsed catalog table SHA-256 ee1301186cbb63ab20214eba53cb369b3a107b07cbc438412bbf9cb799349aed
  2016-01-09 fiction.rar (libgen-meta-20160109, 230,176,429 bytes) SHA-256 c3aa13dfa7ddb4e842a3ba55dddbaf9fe30908831b5f4faba2e66631a3fb88f5; parsed catalog table SHA-256 8dfc5c453cb242d35206336e8eb505d49042e75df8a09dae55024a137f96fe26
  2016-06-17 libgen_dbbackup-2016-06-17.rar (libgen-meta-2016-06-17, 190,512,122 bytes) SHA-256 3d54db847419b450df4e40830ffc95288230bf66c8c9ddc661e7809647dfb241; parsed catalog table SHA-256 fbcfa3b62b86a89b6ef188c0ec9f149229875cff469b35fc37487537bb7d8a59
  2016-06-17 fiction_dbbackup-2016-06-17.rar (libgen-meta-2016-06-17, 240,314,699 bytes) SHA-256 3590b1ead76d2e0bd8247f917ccfe90d237744b05e62d085152f9544a062ba4c; parsed catalog table SHA-256 575f4d7adef13cbb0735b6b683dd5f5def91da99b9c63e5f8295d86abfbabe5e
  2016-11-04 libgen_dbbackup-last.rar (libgen-meta-20161104, 199,327,817 bytes) SHA-256 615b16cdcc31e849c2eab83b11bb54caa7343b710595c25dc9fefad5f7c62029; parsed catalog table SHA-256 f4c0967c8056f1b2438c99c7793be1e440b626d330922203c0b4359a0149aace
  2016-11-04 fiction_dbbackup-last.rar (libgen-meta-20161104, 241,894,340 bytes) SHA-256 9db15b0c17e6f8e6cce4109512a187d50057c19ba525f27502b92408543a3d61; parsed catalog table SHA-256 725151ade2bd4aa20c06bada81a9bf010c03131fa9188a15a2c64243cd7dd896
  2016-12-30 libgen_dbbackup-2016-12-30.rar (libgen-meta-20161230, 205,108,150 bytes) SHA-256 18572f6615ffce8d5cb8503d52a4751ca3abb0b641572ee7e368599da43a8447; parsed catalog table SHA-256 125d606e296cc75502a54a82d384d3b30178bc09b38a1fd69a8ed161b3b90123
  2016-12-30 fiction_dbbackup-2016-12-30.rar (libgen-meta-20161230, 243,419,703 bytes) SHA-256 972a14c00e53de461f7ac9c3cbfc9a0739a5dd02ad3a4cf3588c2376fa40bb83; parsed catalog table SHA-256 ac6c7c59dc6839eee4714c30f2fff86150a33ab8486fea7f26cd18b1644a8f04
  2019-04-15 libgen_compact_2019-04-15.rar (libgen-meta-20190415, 282,762,388 bytes) SHA-256 b5fae3c84a6a40512371dd6a8a26ab422feb67c6184283f6e64568f36e6f4660; parsed catalog table SHA-256 6548febbfeb3ce1f3bf93379d428caffae12658c8d75ae98a394057ad0fe9379
  2020-02-13 libgen_compact_2020-02-13.rar (libgen-meta-20200213, 269,446,563 bytes) SHA-256 9fb734297d87765fbf2332f139dda4cf56d2f2f2cf0c2ec91425f75380259363; parsed catalog table SHA-256 ff7eb0ca632687a20e459e59fbea644c96051b03d255aab2bdcfe3f9ae494675
  2021-02-12 libgen_compact_2021-02-12.rar (libgen-meta-2021-02-12, 328,162,453 bytes) SHA-256 bef9a8430de38848561849d7b93aeae06ee0c2b62b9658e3949da281871f60fd; parsed catalog table SHA-256 61376e381e8be2af2cbbb2996c3321b1fb0b74529b1652a4e7bd9c94b166cd96
  2021-02-12 fiction_2021-02-12.rar (libgen-meta-2021-02-12, 926,040,033 bytes) SHA-256 b2ff2775dff911f3e9f6599d18d34a4ee4a714ac4f9e76513e0e2c1013a15dec; parsed catalog table SHA-256 07b140be916dca3e6ca668ed435856a670908e434f0909227dc0d9b283e0f901
  2017-05-12 libgen_dbbackup-2017-05-12.rar (libgen-meta-20170512, 213,571,994 bytes) SHA-256 e37193c21088da07c8e6a4f1290dc66678caf13975ce658c26bcf587148fa3aa; parsed catalog table SHA-256 f3e0b3bf09304b1d484ed55907fe12b501f00fd83dd1972b659c1ee4f6697e60
  2017-05-12 fiction_dbbackup-2017-05-12.rar (libgen-meta-20170512, 456,237,043 bytes) SHA-256 fdfe5d94a98ffd1c39e091fb99815a6998a287e572e8bc74c581a08345f19ff2; parsed catalog table SHA-256 1c641a1f3354d2451d7da572e368b5f50c7f12bb402cded6b55569665e2d0fc4
  2021-06-05 libgen.rs-dbdumps-libgen_2021-06-05.rar-2021-06-05-a77164ac-00000.warc.gz (warc) -> rar 8c6cd8976bf8ec9cca9e54ed19e16826c515cd4f71cc02fcb14787c9e97bac85 (libgen.rs-dbdumps-libgen_2021-06-05.rar-2021-06-05, 4,075,381,025 bytes) SHA-256 6f40db38486bad5250cbef257b74a23e5cd25837729be9713910b24a7d4020b2; parsed catalog table SHA-256 650c89f9d53d124ba7a7d8f57d4820660a3379cb5a98782b2fed862f13d8ae77
  2021-06-05 libgen.rs-dbdumps-fiction_2021-06-05.rar-2021-06-05-b4787ae8-00000.warc.gz (warc) -> rar b1bbcadab51feec2c33f0e641770f9bb9e3410a0d91e4db6ef4e9395d8497420 (libgen.rs-dbdumps-fiction_2021-06-05.rar-2021-06-05, 934,951,854 bytes) SHA-256 8c9b782a51b4fb358ad3118c6eaf10a622576b55c21536c80ef3b0c13f59fd5b; parsed catalog table SHA-256 27860031684df912262bf63a4557b40fce9d4de8911a4bc4e984235e7ac5acef
  2022-03-07 libgen_compact_2022-03-07.rar (libgen-meta-20220307, 367,472,632 bytes) SHA-256 e2645975a21a0507365b886f1d7eb61f3d3f9690a4912150b0958319099de3ed; parsed catalog table SHA-256 fa48e6664ba998cdabf0986f4cc13cc57bb2060ed0a0ecd36aba55e1efa405e0
  2022-03-07 fiction_2022-03-07.rar (libgen-meta-20220307, 985,753,783 bytes) SHA-256 30ac56c795a57ace4bd9d549bccb61ce45bf31fc0860cb99cd6d79bf3d596d00; parsed catalog table SHA-256 c0a68c2e2e807f920959001203d5a7b699c7ed18f9fe51e2f41a171f12c839c9
  2022-03-08 libgen_compact_2022-03-08.rar (libgen-meta-20220308, 367,637,914 bytes) SHA-256 0cc175e41f042f31f485b2b669a52c258ddc2ed40e43b82ad479a87f437fde35; parsed catalog table SHA-256 7db0eef6bdf6edd4a915cff3e032c08bac9554747dbe21b7917b382d8ef26825
  2022-03-08 fiction_2022-03-08.rar (libgen-meta-20220308, 985,829,360 bytes) SHA-256 a68eee73aa4337f5a5126da32f9868b6a2700bf078c9c0fd00300d4c50f48318; parsed catalog table SHA-256 2da9df08481acad39010aaddad1b1628709f1b1c4cfcbf8701aa28fc50ae63da
  2022-06-19 libgen_compact_2022-06-19.rar (libgen-meta-20220619, 376,799,809 bytes) SHA-256 c989f6e8300a444c01b2bb99ac21d51a3aca2b3a635366cc6a42751310b9ef56; parsed catalog table SHA-256 5cc9767f57e048c3e15bb3a673f5929638cf106d46a104f7f4d2f16cc242a2f0
  2022-06-19 fiction_2022-06-19.rar (libgen-meta-20220619, 997,491,750 bytes) SHA-256 cdb8a821e702785da84ddb448fdf92bb291e06f30aeb3a20792e773d9b7bbc12; parsed catalog table SHA-256 87b01772059d5ff5a0b836dfc8101ca61057f1b53dbd7fe440f49f70891a1dc8
  2023-01-13 libgen_compact_2023-01-13.rar (libgen-meta-20230113, 415,009,403 bytes) SHA-256 5f87a00eefba1e93f858bf74c96a5a9a1d0f9aa5188415202e7c247b6921c367; parsed catalog table SHA-256 638138c4acda6100c02e754afa934a6373121a9ab9134929de8b229b4937cacb
  2023-01-13 fiction_2023-01-13.rar (libgen-meta-20230113, 1,103,284,283 bytes) SHA-256 197b72839f0d9665726c8cbd4168482e1c42654926a55d6ed109f7d7541c8a3e; parsed catalog table SHA-256 64f7a745f14cf696130fcfc8fbd864eec3556df9b5e51501cc6923ab5684d301
  2023-04-29 libgen_compact_2023-04-29.rar (libgen-meta-20230429, 429,176,031 bytes) SHA-256 b4dbb18e038b0f4229b4ab2b957993ab42bb116b48c56e8f5ba715af5083eee1; parsed catalog table SHA-256 21ecbc7cddcef0540bc90eed01509eaffc8b0cbcaebc3ae4dd3e86216a2697c3
  2023-04-29 fiction_2023-04-25.rar (libgen-meta-20230429, 1,133,284,237 bytes) SHA-256 c5aa780f89412ba8fbbfff8b75bc17a0276e249b27b75ff97d864860e912b508; parsed catalog table SHA-256 7a3dbc3cda7c4e18ec645d7dc5d24535d88e0112908d9e4f36e96b0b291977d2
  2023-05-13 libgen_compact_2023-05-13.rar (libgen-meta-20230513, 430,711,935 bytes) SHA-256 54705986f983d0dfcec53846113d1f2faa7fe46f0438331357c985dc83d15506; parsed catalog table SHA-256 3354b270ac1311871a465c9361889f88b78f2b11080eb272fbab56b61adcb435
  2023-05-13 fiction_2023-05-13.rar (libgen-meta-20230513, 1,138,348,960 bytes) SHA-256 f2c488fd745fbd3ca3d2232ecb5b9c64c8f709dbe077f1e758d0d548cdc4e028; parsed catalog table SHA-256 594d554191bafc198e1278d6d0881a4cd936e0ebedd53536005af3b04d38c9bd
  2024-01-06 libgen_compact_2024-01-06.rar (libgen-meta-20240106, 488,627,470 bytes) SHA-256 fcbd99d7fa18e67ef7732ad03316e6a723ff8556149ac9789c87c160817e4bc5; parsed catalog table SHA-256 361a38c0c7457ffb1a63586bc72c0f06bf5a22915ab8ab20ab16447ecc3a80a5
  2024-01-06 fiction_2024-01-06.rar (libgen-meta-20240106, 1,188,758,769 bytes) SHA-256 be3ee7bf05f824af431fbe821cd3783894438bace8f09ca5936e0d7d06caa0e7; parsed catalog table SHA-256 e6f133ca70fdf987f4c4a3139d96b8c55c565fde8c7c96241ca97a760a3fd666
  2024-06-28 libgen_compact_2024-06-28.rar (libgen-meta-20240628, 507,660,382 bytes) SHA-256 4e3746afd983e61521956e4b1c6783fba58072a2b3f01cc88bfeffb94ed6dece; parsed catalog table SHA-256 b0a6ae9feca6c746e9e1014c3d81754a63370cb5e2026a94e347f1bdc28d3fa2
  2024-06-28 fiction_2024-06-28.rar (libgen-meta-20240628, 1,261,925,704 bytes) SHA-256 3456d0a3199df8735eb42f50210baa275ef0344fcff5d7a8bcb12cbc0f417b32; parsed catalog table SHA-256 2d80efd686be577bf90858e5671727a430e026572318b1d922accd220c87905b
  2024-10-02 libgen_compact_2024-10-02.rar (libgen-meta-20241002, 514,088,078 bytes) SHA-256 a8bd80490de629733e61419fbf5ad063ad3565da92cae621d2c6b187f8b982b8; parsed catalog table SHA-256 9b66b67bfa199305fbf41d17542ed00ebd54d0c7d6f0e87797a6191b11d9accc
  2024-10-02 fiction_2024-10-02.rar (libgen-meta-20241002, 1,278,582,785 bytes) SHA-256 7cdd3d2b92cf80b86013f1d8cd3e24f3f689a3ab5bcfd0a627a20327784bc1c9; parsed catalog table SHA-256 5212ba4255aa2ff89e49be39408378d4dd2bcc013a7f9c3a078a37161e607e35
  2024-11-16 libgen_compact_2024-11-16.rar (libgen-meta-20241116, 518,055,736 bytes) SHA-256 8fd4ef4aa5c97326ddadb3dc70f11723d33a76f26c9b4b7aea93be3f357516a0; parsed catalog table SHA-256 69b3b96dbb53248fa0ed21dbfa0425117421d60eec44726f9226b7e7d783e90d
  2024-11-16 fiction_2024-11-16.rar (libgen-meta-20241116, 1,288,550,033 bytes) SHA-256 92ead19d68e4b992c3e9c935bb4d6a5cc653bed6eed44ed237d3e88143fce202; parsed catalog table SHA-256 ed56034a054b0c1086a04d2f0b35ca3e1e0d0aca56320c34f5d44759f506bcf0
  2024-12-17 libgen_compact_2024-12-17.rar (libgen-meta-20241217, 520,829,318 bytes) SHA-256 87a74ca74c07f9766c9e5392eacf6a6d354b4edce9983225e4ba19fbd8dcb4a0; parsed catalog table SHA-256 1f196fac41d7e42c62ef6099a6ba9d536582b9140cb21cbe5e0a0f14222aeb7d
  2024-12-17 fiction_2024-12-17.rar (libgen-meta-20241217, 1,296,846,448 bytes) SHA-256 8bba3c8f90a2800a32252253501a98d0c5a311479a7527ffd9ac41846e58695b; parsed catalog table SHA-256 28f4b6e9e5e2a07b347d40c9c95ee9e4ca5543e3fb2bdb815009ca2d3fb7b072
  2025-01-18 libgen_compact_2025-01-18.rar (libgen-meta-20250118, 522,699,977 bytes) SHA-256 1dd45de89caafacbe9f1b412d027fbf2807e955924e2799348906e9c4460a117; parsed catalog table SHA-256 c0b8eb225286193b5cd9fdfe6a8027fbdb56f5ce66b4e36ae3aac340bf9ca360
  2025-01-18 fiction_2025-01-18.rar (libgen-meta-20250118, 1,304,646,878 bytes) SHA-256 f43a5f4e0e7782964d50c3e8b9f47d86abc3cd6039cfffb135e32ef14596c7c9; parsed catalog table SHA-256 d484eaf0584a6ade8846783752013dde90f64346b7db1cf858b16a98c15fc651
  2025-03-08 libgen_compact_2025-03-08.rar (libgen-meta-20250308, 524,887,099 bytes) SHA-256 3cc299f25c24ee7ba75c9adc890aae5c9aed8c3ceebf8a71eb9c72a554306299; parsed catalog table SHA-256 6b95933966f974f635dd9e01f1cb61111020b00e21d546b3058d5491ed734af6
  2025-03-08 fiction_2025-03-08.rar (libgen-meta-20250308, 1,313,545,516 bytes) SHA-256 946a7efa87fa51fd436b0117db51b290d16ca954558b10729679fb2f3ed725a4; parsed catalog table SHA-256 59410f231e69345f85f7a27b0d14ef663e87f4a8223e896d31c28e2c33e5a75f
  2025-06-03 libgen_compact_2025-06-03.rar (libgen-20250603, 530,821,763 bytes) SHA-256 e3e702e6496364073cb38f536efc43b325606690f76cba4c18cf10904075f5b2; parsed catalog table SHA-256 fb51b304f5bf91bb5ce9ffff941834d75cca318f1711a7751fab8080f9ce8a85
  2025-06-03 fiction_2025-06-03.rar (libgen-20250603, 1,324,697,887 bytes) SHA-256 e22c00ea1d31b7d154e76813552b72aba480461d919c4bf843465fbef6180e26; parsed catalog table SHA-256 ab4ca6f553d3168dc1848eb98cdff3a1a571a9c36b2fc4cca3a655e5a16bed39
  2020-02-08 http://libgen.rs/dbdumps/fiction_2020-02-08.rar (wayback:20210217010544, 801,097,717 bytes) SHA-256 f28145748b8cb9f730eb879c406638ebe78f43423b7b99217b6e90800e6a6bd4; parsed catalog table SHA-256 7da6dbfd910c37e0fa130fac5758d9aea8e44d930472b33f482af19058ce2db4
Source pilimi: P1ayer-1/annas-archive-index (18 parquet files)
  SHA-256 b3005a74ca30e2ca6dc5a8ddc8a275db340f3877271672ae752555b9d8f08f15 train-00000-of-00018-0de08d15f83d5a95.parquet 086083645d2dee61e9ca8e069de6f5dfa854a96b63417a60e72a0f5d8e339907 train-00001-of-00018-c5b87dfcfaaca263.parquet 4d8dc8fdd98d0b065eed786c2756873b652a8383a62fbb76805f113276ecc7a0 train-00002-of-00018-b0dd6be7e63187a1.parquet f731700cb6681f16b5d7011d33b6cfe29352daf6ac15f38c54662db0f9586f37 train-00003-of-00018-0bbb9ba4be152d8b.parquet dc27ecd99d3245632291262d7957e579cff2a2929b8324891b3c5d2674b207d8 train-00004-of-00018-ea10c700bc0c6835.parquet e44756886570f26764a317b66345cb85166a872022d87ba1aafe89750dc1d350 train-00005-of-00018-fa58b4f7bc3ec283.parquet 47505e79575f144f45eefeae30e882fcd08e0d58841aadf397911072c6cf8971 train-00006-of-00018-ed59a37788bfedc5.parquet 7f811cfd2ae5a2d03ada29221430af4875b1602c38bae298bbde1d0885e85370 train-00007-of-00018-e36786f5069ebd1d.parquet 2ae0a906abe3ec0538f70f7948556800ecb264160b9bfe338c592a3cd36a96e2 train-00008-of-00018-91a3071dc8471e38.parquet 1ee01c5c8864d43a1393eca3adc49fc16639b1ccadf88366c0cec1d035d2ac40 train-00009-of-00018-0b5b1757686f33bd.parquet 500159efccc2fe74ec365f244843c92d2eb9d81b68dc7dacab7c390e4363f2cf train-00010-of-00018-23cd38004aa9fe5e.parquet b1046096da29e2aff76a45951bbc96bfeff2f1029aa425823e99e7f4a583927a train-00011-of-00018-f0423707a2f379dd.parquet 60b3d2c0ee333db27437ab87d8c8b6cb1b9a5dcd378e0d30d2cf546fe6084667 train-00012-of-00018-3541a214f73c36cf.parquet e851a1ef375b8a71fd39563cd733b3fc619a3ddaf5e9589abe7a9e4cc3e3e24f train-00013-of-00018-94ea5b888df94a3e.parquet 5242e4917d79406d4a57dacb93874b8931051fe114901f55aee61cc67ca02c7f train-00014-of-00018-ff19e1d3c674dce3.parquet 048cdf4b90fcad0142968b56defe7ed43a26b27d2f828882173109da14912938 train-00015-of-00018-dd633849fdd8070c.parquet 90d4903cb35e4f9fd5ddb9542ed57d046c8c4e18df5e76af09c200862921fe83 train-00016-of-00018-cb1438e48baf670a.parquet 858089c6992df6962bfb05cef701558ba6fe4360dea77c0b63953ea7a7a79c5e train-00017-of-00018-b2b51d65a0cfde19.parquet
  Pirate Library Mirror index of Z-Library, metadata-only copy re-hosted on Hugging Face; records tagged by PiLiMi release
Source books3: filenames.txt (psmedia/Books3Info), parsed records carried over from build payauthors-2026-09-26
  SHA-256 eb34489806bc36674a36515f9d5eb1d07a06edbd53ef2ce6aeb532e027bd7faa; parsed records SHA-256 bec404558db3523bd5674aff15708c686587e6010d9f111c801dc1e4597705e8
Source books3_isbns: Books2_ISBNs.txt
  SHA-256 6d67cb232fc60b10e34fe0afc7ffb409528f519b49d57cc79647179fd9ca99e3
Source zlib3_index: P1ayer-1/annas-zlib3-index (Hugging Face, 5 parquet files)
  SHA-256 c06f449014008b8a340e2867d410cca603600bed7b0789faf086e4d5f91ec062 train-00000-of-00005-421d14d609b06e30.parquet 0a10340de0523a670668108181b37c1bbd6fdfe3d6b72e0ca778b30f0cdb885a train-00001-of-00005-33b56dc710868fcc.parquet 03f8fb4e2130d081025c1b0678a43e16fd496f590f336481694ccfe3ccd16e1b train-00002-of-00005-8801c913706c9de7.parquet 6eddb91d0a0133654434d69824e74344dabdba8de43cdc459744e1612a8e8735 train-00003-of-00005-11a7abbf65bdb652.parquet d4ee2a61f1d75b2ebd758638f6162089b4cabf8d258be21b92df22fd3345ef7e train-00004-of-00005-9f57636ca249d4d4.parquet
  Anna's Archive index of Z-Library records (zlib3), metadata-only copy: 2630955 records, Z-Library IDs 22,430,000-25,639,999, added 2022-08-25 to 2023-08-06; 2626972 not already in PiLiMi
Source majinbook_zlibrary: zlibrary.jsonl.gz, MajinBook (Mazieres and Poibeau), Zenodo 10.5281/zenodo.17609567, CC-BY-4.0 (MD5 5876dc0cb3ef4be79a35fbaf59d5bcbe)
  SHA-256 da1d50b04c97f79c6c8ac1030f74cd0f083104e62da19a3bffe1e1ed626ad071
  Z-Library metadata as of January 2025 per the authors (sourced through Anna's Archive), EPUB-type records only: 8097488 records; 4313151 already in PiLiMi, 1431775 in the zlib3 index, 2352562 known only from this extract (IDs above 25,639,999)
Source ia_lending: Internet Archive scrape API, q=collection:inlibrary, fields identifier,title,creator,date,isbn,publisher,language,addeddate,publicdate (fetched 2026-10-01)
  SHA-256 30d7c22621e6992cd323a5801617cd99762a309e1066a90c9228f8b99c2b0934
  Internet Archive lending library (scanned print books available to borrow): 4423866 items, added 2008-02-19 to 2026-09-23
Source usco_recordations: recordation_2026_01.zip (data.copyright.gov, Recordations / Raw parsed CSV, published January 2026)
  SHA-256 99ec235192fd03203e7d6f95466774f3f5f07cef37ac7d606fd196425cd707a9
  U.S. Copyright Office recorded documents (transfers, licenses, security interests, notices of termination and others), recorded 1978-01-03 to 2025-06-26
Source usco: reg_non_dramatic_literary_work_2026_01.csv
  SHA-256 4bfba9f70bf47954d964f9350c495c4bc953149521a1e25b10f3bc9d2b925336
  U.S. Copyright Office public tabular registration data, non-dramatic literary works (TX), as published January 2026; TX registrations 1917-12-17 to 2025-12-30; 9284891 rows read, 1249979 non-TX rows skipped
Each LibGen archive was parsed into catalog tables by the build scripts kept with the dataset (parse_libgen_sql.py). Where an archive was parsed more than once (a parser fix), the last parse is the one used and its checksum is listed. The parsed table for 20151114-libgen_compact.rar was not checksummed.
Records: 51 (LibGen non-fiction 0, LibGen fiction 7, PiLiMi (Z-Library) 14, Z-Library (after PiLiMi) 29, Internet Archive lending 0, Books3 1); 15 distinct titles; 32 records with candidate matches to 5 U.S. Copyright Office registrations; 1 LibGen editions whose ISBN is in the Books3 ISBN list.
What this report shows, and what it does not. This report compares the name searched with dated Library Genesis catalog snapshots (listed in Data provenance), the PiLiMi index of Z-Library, later Z-Library catalog records (Anna’s Archive’s index of records added August 2022 to August 2023, and the MajinBook extract of the January 2025 catalog), the Internet Archive’s lending-library catalog, the list of Books3 file names published by Peter Schoppert, and U.S. Copyright Office registration data as published in January 2026, each identified by version and checksum in this report. A match means that a corresponding catalog record or file name appears in that source. It does not establish that any person or company downloaded, copied or used the listed file or dataset, or that any model was trained on a work. The Internet Archive is a nonprofit library, not a pirate site; a lending-library line means the Archive lists a scanned copy of the book for borrowing. “ISBN in Books3” means the edition’s ISBN is printed somewhere in the Books3 texts, as extracted by a third party; it supports, but does not by itself show, that the edition is in the dataset. Copyright Office results are candidate matches to public registration records; each line states how the match was made and links to the Office’s record for verification. A match is not a legal determination of authorship, ownership or infringement, and the absence of a match does not show that a work is unregistered or absent from another dataset. LibGen catalog entries for the same edition are combined into one line with a count; no entry is dropped. Matching is automated and not perfect: expect some missed records and some matches that are not the author’s, and check any line you rely on. Source-file checksums identify the exact files analyzed; they do not, by themselves, establish a file’s origin, completeness or authenticity.
Registration matches other than by ISBN rest on a normalized title plus an author or claimant surname and should be confirmed against the linked Copyright Office record. LibGen records an edition statement for only about a quarter of non-fiction entries and almost no fiction, so blank edition cells are normal. The catalog_entries column counts the LibGen entries combined into each line.
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