1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xc65f542fcb02dbb7473d5eb2aa3545ade6945eebb92f83935584bde0d0475c03. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edb7d9e2-50ad-40b0-a0ea-c4db65476d78.json and https://artists.proofprofile.net/proofs/artist/edb7d9e2-50ad-40b0-a0ea-c4db65476d78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
コロムビア昭和歌謡アーカイブズ ひとりぼっちのマチャアキ
定番ベスト4シリーズ 堺正章 さらば恋人 / 涙から明日へ / 街の灯り / 幸福への招待
さらば恋人 - オリジナル・カラオケ
涙から明日へ - オリジナル・カラオケ
幸福 (しあわせ) への招待 - オリジナル・カラオケ