Shu may refer to: China Sichuan, China, officially abbreviated as Shu (蜀) Shu (kingdom) (conquered by Qin in 316 BC), an ancient kingdom in modern Sichuan Shu Han (221–263) during the Three Kingdo
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 0x1e339ab45dd02aa4239c38e8c64d83801bebcb7b42092410aa8e9dc0a0ab9db3. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e42445bb-d484-45be-8b2a-9e2dd7186cd0.json and https://artists.proofprofile.net/proofs/artist/e42445bb-d484-45be-8b2a-9e2dd7186cd0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).