1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x231c991ae7c44c7a0e6019509c2fe430ef12c6b37c28c530effeda43ea6c494c. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a77af794-9e42-41d3-ac4a-df120fc280fd.json and https://artists.proofprofile.net/proofs/artist/a77af794-9e42-41d3-ac4a-df120fc280fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Heroes of History (staccato string version)
The Sheikh's Treasure (strings and ethnic pipes)