Tian Han (; 12 March 1898 – 10 December 1968), formerly romanized as T'ien Han, was a Chinese drama activist, playwright, a leader of revolutionary music and films, as well as a translator and poet. H
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 0x704572af538fcf8db471a03cfb7b71e7cf193409aa7c4ab5970271316e62d277. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8c212f5-3fa8-4b46-9a07-bacde30c2eaa.json and https://artists.proofprofile.net/proofs/artist/e8c212f5-3fa8-4b46-9a07-bacde30c2eaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).