1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127f888de351c1ab0929cb1e7e18075578016f0b7b68cac8226f59e9d7450f8c. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1dd5b8a9-ad20-4aa4-ac99-edc6cfeca5bd.json and https://artists.proofprofile.net/proofs/artist/1dd5b8a9-ad20-4aa4-ac99-edc6cfeca5bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
神のみキャラCD.3 中川かのん starring 東山奈央
桜色卒業｜バレバレ・バレンタイン