Echohawk is a young adult historical novel written by author Lynda Durrant, first published in 1998. Set in the early eighteenth century, it is about a white boy adopted by the Mohicans. Plot summary
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 0x94a2af0563ed1518e5355f28b01613dc6c413cf0369d8c123472a3e0948787df. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba390046-f76b-48b3-bbe9-d3accec2fbe0.json and https://artists.proofprofile.net/proofs/artist/ba390046-f76b-48b3-bbe9-d3accec2fbe0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).