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 0x64a208dc1e106550307a616d5043eba5bf02c1f77be1beb5d7d70bb9da5e1cf6. 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/71c266a3-0279-49cd-bb16-f3e5f86ef948.json and https://artists.proofprofile.net/proofs/artist/71c266a3-0279-49cd-bb16-f3e5f86ef948.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
「VAZZROCK」bi-colorシリーズ⑧「久慈川悠人-sapphire-」 (ドラマトラック追加版)
「VAZZROCK」bi-colorシリーズ3rdシーズン③「久慈川悠人-sapphire×morganite- Enjoy the holidays!」
ツキプロ合同舞台『斬心』主題歌『斬心-無形ノ八重-』