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 0xe4fb4a69a4e00f9b0d7918654f8cf1f032452e37ae6a9eabb8cd12f9a2a2c816. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22f3b25e-f55c-45d7-a054-3f3ad9d8ed88.json and https://artists.proofprofile.net/proofs/artist/22f3b25e-f55c-45d7-a054-3f3ad9d8ed88.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tears For Fears / Breakthrough 2020 Remake