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 0x473a0919786cfcb889f045f9710f465fe88fd6b4705240de6fe202bf70099a7a. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cac164e-5ffb-4e4d-9e3c-8233465aa734.json and https://artists.proofprofile.net/proofs/artist/3cac164e-5ffb-4e4d-9e3c-8233465aa734.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
東京妄想フォーエバーヤング/ダーリン no cry!!!【イラスト Ver.】
Mamono, Bom-ba-Ye (Tamashii no Kakusei Hen) / Bye Bye Train
Renai Shijyou Shugi Summer Everyday / Doki Meki Library
Tokyo Mousou Forever Young / Darling No Cry!!!
この部屋が世界のすべてである僕、あるいは君の物語