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 0x48dd1e2ab2f649c2e5c31595f62e51b473fd6eb33a888723535089e3ec0f56fd. 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/0834deca-6c27-4b6d-af90-6b6ee272ab35.json and https://artists.proofprofile.net/proofs/artist/0834deca-6c27-4b6d-af90-6b6ee272ab35.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
それいけ！アンパンマン えいごでうたおう
しあわせなら手をたたこう(If You're Happy And You Know It)
大きな栗の木の下で(Under The Spreading Chestnut Tree)
アンパンマンのマーチ カラオケ(Anpanman's march karaoke)