Chopstick Brothers are a Beijing-based Chinese duo who became known online by their 2010 viral video Old Boys. In 2014, they wrote, directed, and starred in a full feature film Old Boys: The Way of th
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 0xaf523ea92d06c372132a573b9c5aaf3de7db4a2260468310d9cfca146a8714f0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f9021a4-af5c-4799-93c6-c024efdc3f52.json and https://artists.proofprofile.net/proofs/artist/5f9021a4-af5c-4799-93c6-c024efdc3f52.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).