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 0xf7e509bed0709e0e638c41dad45fb1c749c23aa5d4c09dedf1f53a940bbe0919. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ced39b96-d6a5-4f23-be2b-068ea998c38b.json and https://artists.proofprofile.net/proofs/artist/ced39b96-d6a5-4f23-be2b-068ea998c38b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Song of the Green Blossoms (feat. Sakune Xiba & Sakune Xino)
Hanamizuki (feat. Yo Hitoto) [Cover] [Xiba "System of Greenhouse" Remix]
ハナミズキ (feat. 一青窈) [Cover] [Xiba "System of Greenhouse" Remix]