Signal fire can refer to: Fire used as a light signal, a beacon that can be seen from a distance. Beacon (signal fire) Phryctoria Byzantine beacon system A smoke signal "Signal Fire" (song), a 200
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 0x09bfd188fb4c9cffd4ae72583dc60249b135876a57bfed9f42f2097f88f5a37d. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c09224a-9d05-42ad-a0ba-62502b7618ca.json and https://artists.proofprofile.net/proofs/artist/9c09224a-9d05-42ad-a0ba-62502b7618ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).