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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db832c63c71a811dc0505d4ad63f1dbfa7811ecd6d2894dab8e9f31bf4ff020. 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/d4fabc64-3b30-4fae-aa5f-69088eac291c.json and https://artists.proofprofile.net/proofs/artist/d4fabc64-3b30-4fae-aa5f-69088eac291c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Enjoy English!With Eric&Kids ～9歳からじゃおそい!音楽であそぼう!えいごのうた～
Sing In English! With Eric&Kids ～9歳からじゃおそい!音楽であそぼう!えいごのうた～
May I Go To The Bathroom､ Please?(トイレにいってもいいですか?)
If You're Happy And You Know It(しあわせならてをたたこう)
素読み&歌 流し聞きで覚えられる!九九&英語ほか
うたって学べるおぼえ歌～「ABC」から「九九」まで!～