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 0x4362f2a5a438276fe7573d65914698dd7426e8c4dbf70b457bac2113d0d7c5ad. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef05a276-9b0f-493e-8ace-b77cb00aadea.json and https://artists.proofprofile.net/proofs/artist/ef05a276-9b0f-493e-8ace-b77cb00aadea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
恋色マジック・オーケストラ（幻想郷版）/ KMO
スパーク・スターズ・ストライカー / KMO
イヌの大三角 (前回の戌年から6年経ったので次の戌年まであと6年 in 2024)
蛍と塵、それを見る鼠 (リグルちゃんと新人１面ボスのウバメちゃんはとっても仲良しなんだね!!)