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 0xd07d76ecbc2401e1ee43542f33c3fe5c1732e568ae2f8449d7c09892ecdb0a02. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6c4758b-43e9-4afa-98de-f6f8312e80f9.json and https://artists.proofprofile.net/proofs/artist/f6c4758b-43e9-4afa-98de-f6f8312e80f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
斯莱特林拽姐 卡珊德拉（《哈利波特 人物印象曲》）
《哈利波特 人物印象曲》格兰芬多骑士 罗恩