Tian () is one of the oldest Chinese terms for heaven and is a central concept in Chinese mythology, philosophy, and cosmology. During the Shang dynasty (17th–11th century BCE), the highest deity was
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 0x4335bcf1c5236a0239731719c1e63e6e8d1a9c599f6fa47d454f80d1c9e4a0d1. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2d38d91-1786-4bc7-a06f-15bea472f8a6.json and https://artists.proofprofile.net/proofs/artist/a2d38d91-1786-4bc7-a06f-15bea472f8a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).