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 0xc561510a4b2ca48ea068e27bb585e0fc28f94b042197beabaa60764586daa69c. 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/5c764746-81f0-433b-b43b-6f927093845e.json and https://artists.proofprofile.net/proofs/artist/5c764746-81f0-433b-b43b-6f927093845e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
強がりライライライ / セメテセメテ / ぱーれぇ～ / ガラスの純情
どのみちハッピー！ / 雨に唄えば / 愛について考えるよ / エンドロール
Life Is Beautiful／シーユーだけ。／Dong-Dong-Dong!!!!!!!!／ドレス／好きな人の好きな人
だれだって、アイドル。/カスタムにきちゃん/Tell Me/starry wink*
リスペクトーキョー (アップアップガールズ（２）ver.)
にきちゃんわんだーおんぱれーど
世界で一番かわいいアイドル / し・て・る・も・ん
っていう初恋のお約束／ハッピースLOVE♡
どしゃぶりのテラス席 / フユトテトテ