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 0xe2b14e8474763535b2818022ef9eb74b14b57fb00c2675f7de686fd5441fba38. Chain 2 (Bitcoin): anchored in block 953889 (2026-06-16T04:57:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e86b2b5-f39c-4c00-bc7e-c50ba0729f81.json and https://artists.proofprofile.net/proofs/artist/0e86b2b5-f39c-4c00-bc7e-c50ba0729f81.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
入九流 (游戏《燕云十六声》九流门招生同人曲)