Holly Jackson (born 6 December 1992) is a British author of mystery novels. She is best known for her A Good Girl's Guide to Murder series. Early life Holly Jackson grew up in Buckinghamshire, Engl
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961623ce0f0ade2642db57e8e49e111e919fb23405203db4276c248dd03ae5a3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd84dd50-a33c-4fef-834c-ed31f5e3abcd.json and https://artists.proofprofile.net/proofs/artist/fd84dd50-a33c-4fef-834c-ed31f5e3abcd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72df35dfd6a8de29f4c72d5fc1e8bc97384dc0c784b8c5ea7a7af39996427b97. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:52:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM72301266.
A Good Girl's Guide to Murder - Teil 002
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2579ae6036075019952b06a7efcb6e2217b0a9adc569660f7e6aaa777f70ff3e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135228.
A Good Girl's Guide to Murder - Teil 005
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9faaaa03fb1b05ddb0997c0e1c30f106b80923d0acbc1ac41f51619a34da17a. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135231.
A Good Girl's Guide to Murder - Teil 004
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d1248d5db7e839705a68345d05fb84664863e3c054ec258c16f58341aa1300. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135230.
A Good Girl's Guide to Murder - Teil 006
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88adccd63ba6746a393695292e710b94206287f303be8d66e5d6bd6e8bb1cebb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135232.
A Good Girl's Guide to Murder - Teil 008
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe197ef3692704aadf175901935fdf4fa5fc090ed5200d0a91b239e755104c1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135234.
A Good Girl's Guide to Murder - Teil 012
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2101bb2938ceee7fc0b82b8703db6457241da09a14c43dba65750dc77aeba7. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135238.
A Good Girl's Guide to Murder - Teil 003
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8483115740ff767ccb221fc7c2c7558b377fa755371c01ba686373b086c24911. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135229.
A Good Girl's Guide to Murder - Teil 009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc111756b61e3e5fbb4d59e2aed01fd6c3929bde0134e386e63841fafe1801. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135235.
A Good Girl's Guide to Murder - Teil 007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf492832527d1359b1f815d8aeadf46f9516f5aa366a12817752d3ee8eeb7aa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135233.
A Good Girl's Guide to Murder - Teil 010
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2aa16f60369ccf1ec655f0cefe0b56cfc56efe16b53fe552c2aa7e6d0535c7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135236.
A Good Girl's Guide to Murder - Teil 017
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb74cd40171e434cbf74ccb3cc0e37cbd821346749c4715f162b65cad1ada13. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135243.
A Good Girl's Guide to Murder - Teil 013
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0049cef1a2a8a401f17e7002e092243a48b3dd5c3c1e7d66cea2c3aef7796a2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:00:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135239.
A Good Girl's Guide to Murder - Teil 011
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6a3c8f2c07a939602223a0d6c366afa5a31c2509703b12857a17499c67e710. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135237.
A Good Girl's Guide to Murder - Teil 014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafff2da1acd0b90b3f0a348cbc827db7a4cbe81eb6fd516d6f1440553bf35208. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135240.
A Good Girl's Guide to Murder - Teil 015
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9277b4edae3d81ca358086f2bd433e674f5afab18f1dc221a3004588b57fcf8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135241.
A Good Girl's Guide to Murder - Teil 021
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505710d9e3aba6aa68cc52965c1e63bea5c385971bbfc868e0207699ee7960c1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135247.
A Good Girl's Guide to Murder - Teil 027
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4e1da48434dba3cf14bd43bf1b1691e737a45ad344838f730c547ffca62fab. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135253.
A Good Girl's Guide to Murder - Teil 030
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdb47ad035ede5ea6ed9ff1d77230b32ed3fd7330685bb9041c275c8da757be. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZK82135256.