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 0x769e7808671bbfb6815cfd55b5885019ef8d841a3df0d230f80d608db1c00cfb. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/926d7868-f74b-401a-a54d-aab204ca4f3f.json and https://artists.proofprofile.net/proofs/artist/926d7868-f74b-401a-a54d-aab204ca4f3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
BOKUGA TSUKUTTA AI NO UTA~ITOSHI NO Emily~
ぼくがつくった愛のうた ～いとしのEmily～
SABOTEN NO HANA HITOTSUYAME NO SHITA YORI
ZAITSU KAZUO BEST SABOTENNOHANA HITOTSUYANENOSHITA YORI
SABOTENN NO HANA HITOTSUYAME NO SHITA YORI
BOKUGA TSUKUTTA AI NO UTA～ITOSHI NO Emily～
財津和夫ベスト/サボテンの花<"ひとつ屋根の下"より>
サボテンの花〈"ひとつ屋根の下"より〉