Broken Homes is the fourth novel in the Peter Grant series by the English author Ben Aaronovitch, published in 2013 by Gollancz. Plot PC Peter Grant and DCI Nightingale are called to investigate a r
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 0xfe5bb6cb0adb19b1f7baead6078583faaf3dd8e8638642c6b1ab76bebd90a977. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65646aa7-6edc-4e90-aa29-bc127b7be953.json and https://artists.proofprofile.net/proofs/artist/65646aa7-6edc-4e90-aa29-bc127b7be953.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).