Lock In is a science fiction police procedural novel by American writer John Scalzi. The book was published by Tor Books on August 26, 2014. The audiobook of the novel was released in two versions, on
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 0xdcbe7be0b07cb4570b051ee5790fa23ceb95f7b1221de0b76d38b87816dda01a. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffdaf21f-3869-4d86-9558-06bc1a30ad13.json and https://artists.proofprofile.net/proofs/artist/ffdaf21f-3869-4d86-9558-06bc1a30ad13.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).