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 0xb0209a8d5127485c41526b83249527df8831b835f5f53876c5c91042f0053901. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98512a92-2b20-422b-9781-cb9a2192fec4.json and https://artists.proofprofile.net/proofs/artist/98512a92-2b20-422b-9781-cb9a2192fec4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
☆SHOW TIME 1☆星谷悠太&那雪 透/｢スタミュ｣ミュージカルソングシリーズ
☆2nd SHOW TIME 8☆ 星谷×揚羽&揚羽×遥斗/「スタミュ」ミュージカルソングシリーズ
☆3rd SHOW TIME 1☆ 星谷悠太＆華桜会/｢スタミュ｣ミュージカルソングシリーズ