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 0x4967a5dd8dcc7ff4e49818856c29d047873ac73822f13f9eefdef67519d691b7. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdf70d80-9d59-463c-a0f6-f8e186cee267.json and https://artists.proofprofile.net/proofs/artist/fdf70d80-9d59-463c-a0f6-f8e186cee267.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
SQ「あの頃の僕らは」シリーズ・堀宮英知「愛を祈ろう」