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 0x0970e5082d15f6afaddf15abd9bbc4185b23878ed396b6f2d08ca96dde2309b6. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01597a4f-47d2-479a-a181-5cfa91325a60.json and https://artists.proofprofile.net/proofs/artist/01597a4f-47d2-479a-a181-5cfa91325a60.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ツキウタ。シリーズ11月天童院 椿「流星舞台」
ツキウタ。シリーズ 天童院椿「嘆きの谷のカメーリア」
「ツキウタ。」キャラクターCD・3rdシーズン12 天童院 椿「月凍詩篇-或る羊飼いのウタ-」
「ツキウタ。」キャラクターCD・4thシーズン6 天童院 椿＆伊地崎麗奈「Stars in my heart」