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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa94bf172b6546d7de0696eb7f129338eec13b981b58b49111652886102a1217. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ebfde53-cdb9-4801-bea7-4aca391f7c29.json and https://artists.proofprofile.net/proofs/artist/6ebfde53-cdb9-4801-bea7-4aca391f7c29.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
なぜ 恋をして来なかったんだろう？
櫻坂46 - 雨の日に聴きたいプレイリスト
櫻坂46 - 嬉しい時や感謝の気持ちを伝えたい時に聴くプレイリスト
櫻坂46メンバーが選ぶ夏、夕暮れ時に聴きたいプレイリスト
櫻坂46メンバーが選ぶ秋に聴きたい曲
I want tomorrow to come -OFF VOCAL ver.-
I want tomorrow to come (Special Edition)
櫻坂46メンバーの「私のクリスマスソング」
静寂の暴力 | Seijyaku no bouryoku -NURKO Remix-
何歳の頃に戻りたいのか？ | Ikutsunokoronimodoritainoka? -Raiden Remix-
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45b5e207938301d8d2151d0f77a7d280062aae31cc6b7fa4446520216046664. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4hVECXakmpdqigQq1mJwNg.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4hVECXakmpdqigQq1mJwNg.