Ziyou () may refer to: Ran Qiu, courtesy name Ziyou (子有) Yan Yan (disciple of Confucius), courtesy name Ziyou (子游) E See also Ziyu (disambiguation), or Tzu-yü
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe344d4337d3d35a0785c9aef538b59e1ab57ef9455ce8fa6838e259a9f9f2c98. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3937c61c-2aad-4318-84ff-c144e9c78a3b.json and https://artists.proofprofile.net/proofs/artist/3937c61c-2aad-4318-84ff-c144e9c78a3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).