A-RISE (綺羅ツバサ(CV.桜川めぐ)、統堂英玲奈(CV.松永真穂)、優木あんじゅ(CV.大橋歩夕))
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 0x9475c8a53cd2b5f4dc0100c5997ce191aca6d2a16f25a623901335e63a2ff1ee. 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/89842207-e71e-466e-8f31-dcc96f676181.json and https://artists.proofprofile.net/proofs/artist/89842207-e71e-466e-8f31-dcc96f676181.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).