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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1666a4c194cedd8c5ec3d40609035836a4b56ae0fb1e3ed8c753c914811a1b. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f559309-3ec4-4c42-9a15-fee1153f2990.json and https://artists.proofprofile.net/proofs/artist/9f559309-3ec4-4c42-9a15-fee1153f2990.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
種まき蔵「松コース」 (初回生産限定盤)
種まき蔵「竹コース」 (初回生産限定盤)
ゴリラ (ヒガシローランドゴリラ盤)
†夏☆大好き!ヴィジュアル系† (ブルーハワイ盤)
†夏☆大好き!ヴィジュアル系† (いちご練乳盤)
†夏☆大好き!ヴィジュアル系† (宇治金時盤)