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 0x98597559d7b8ba6fade14d86b9433ac8d5ac489a4ba7f51ffcde8a1531037dd0. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e175eaa3-08e9-43ac-9c2c-a9916b36358c.json and https://artists.proofprofile.net/proofs/artist/e175eaa3-08e9-43ac-9c2c-a9916b36358c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
音楽紀行／北アルプスの星、星降る空に歌う
フォトンシリーズ「月の光のセレナーデ」