Lauren Tarshis (born November 23, 1963) is an American author of children's books, with several series of fiction, non-fiction and historical fiction works found in thousands of libraries and translat
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f53d81227d6baa3020356b02e07983010bcb1346f1c124e4c696c90f48c7581. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7be2e651-1a34-425a-8d52-db4a0e264b23.json and https://artists.proofprofile.net/proofs/artist/7be2e651-1a34-425a-8d52-db4a0e264b23.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Survived the Nazi Invasion, 1944 [I Survived 9 (Unabridged)]
Chapter 1 - I Survived Hurricane Katrina, 2005 - I Survived 3
I Survived Hurricane Katrina, 2005 [I Survived 3 (Unabridged)]
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff703c7d27c440062c9981b1e30e4ee9d6dcbf8f7a950153f7f1246e379c89b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/DEZU52124383.
Chapter 1 - I Survived the Attacks of September 11, 2001 - I Survived 6
I Survived the Attacks of September 11, 2001 [I Survived 6 (Unabridged)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556571d4298719d3f1d76f75804f27d55f5d9463278620733a3f1e25ae40263f. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/DEZU42120717.
Chapter 1 - I Survived the Bombing of Pearl Harbor, 1941 - I Survived 4
I Survived the Bombing of Pearl Harbor, 1941 [I Survived 4 (Unabridged)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000584e7cd78cb25ffdfcb87e7c25c285acb14ae1af296368f3b8afa8efd0dc9. 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/DEXO72167914.
Chapter 7 - I Survived the Shark Attacks of 1916 - I Survived 2
I Survived the Shark Attacks of 1916 [I Survived 2 (Unabridged)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351e8b928361882edb70c4a2b2e7560391ce49de192b20a558199f63790c26a0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEZU32112325.
Chapter 7 - I Survived the Sinking of the Titanic, 1912 - I Survived 1
I Survived the Sinking of the Titanic, 1912 [I Survived 1 (Unabridged)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe3bbe79fadc36f809ecb33b3ef602f1a4ff59654efc83d49482b3e7840fd6e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEZU32164909.
Chapter 3 - I Survived the Sinking of the Titanic, 1912 - I Survived 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdf683a7e51405846da07f6d34933f79a8d4ab5aa48ffdc14d4c7eaa97fa31f. 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/DEZU32164905.
Chapter 4 - I Survived the Shark Attacks of 1916 - I Survived 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32fd8b88372203f8ebbb8d98b03a24c243bc7e151940ae13630563cf5b1fbd4. 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/DEZU32112322.
Chapter 10 - I Survived the Sinking of the Titanic, 1912 - I Survived 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23a511319294bdc7c0388d468bb130e2316d4f882c97172ed684a83a58bea8a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEZU32164912.
Chapter 11 - I Survived the Sinking of the Titanic, 1912 - I Survived 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781dc4c9d19cc78d7b785e3248589f86cbf548b32113a9460580c1b2201e30c5. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DEZU32164913.
Chapter 1 - I Survived the Attack of the Grizzlies, 1967 - I Survived 17
I Survived the Attack of the Grizzlies, 1967 [I Survived 17 (Unabridged)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb730dddfd62a6a100618962c0759568f6dc92e3faa0542d8567b94c771f78427. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DEXO72150965.
Chapter 3 - I Survived the Shark Attacks of 1916 - I Survived 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34532114241162c5b6f897a146764a423c97fb2e2dcf8a7cab2dc74ccea9c72. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZU32112321.
Chapter 1 - I Survived the Japanese Tsunami, 2011 - I Survived 8
I Survived the Japanese Tsunami, 2011 [I Survived 8 (Unabridged)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3b9c49d55488d74773d4a6f86b0f2b5d34616aa02004fc29593492df8555e8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZU52195607.
Chapter 8 - I Survived the Sinking of the Titanic, 1912 - I Survived 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f3de0a8c03f8f70d4b4063af9f1bc20583f51128f23e7b961cdb3d8471a07b. 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/DEZU32164910.
Chapter 22 - I Survived the Sinking of the Titanic, 1912 - I Survived 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4de7446fd180196a56296a70623ef6eb0a56f475e511397434241d506a18ee. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEZU32164924.
Chapter 6 - I Survived the Sinking of the Titanic, 1912 - I Survived 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66308040fc37eb9dcf4bd21b022a42956cfedc4dcad2562d1a208002aef4328. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/DEZU32164908.
Chapter 2 - I Survived the Shark Attacks of 1916 - I Survived 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ac6c17e71cf74d1f8a47cfe7d6b631ce7a17d95634d61ec53f5a0e6fd36d8d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZU32112320.
Chapter 12 - I Survived the Sinking of the Titanic, 1912 - I Survived 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bcf4525b8d028f421ad1ebd89923cddbe7d6cde850080aeccf2dbd5dca6dac. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZU32164914.
Chapter 1 - I Survived the Sinking of the Titanic, 1912 - I Survived 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcffddc73cfcd895b86ba2aa7eff11c5536691640b3d7485f91e6d5e58eda9b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZU32164903.
Chapter 9 - I Survived the Sinking of the Titanic, 1912 - I Survived 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd423997cfb363b15117bc255328b424c11eed9c141e07725f6656cdccc94424. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZU32164911.
Chapter 9 - I Survived the Shark Attacks of 1916 - I Survived 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6af6fb6b896bc61fda7d87022a71fa96cf42f8fa35576009a33ae77df70915. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZU32112327.