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 0x5cf913bf1a2b80215b79ec323aac7d4870ae0bdf5c00f5da96ea1e58bc2b060b. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8150552-fa17-45fc-bf3e-b8ef21254fa8.json and https://artists.proofprofile.net/proofs/artist/e8150552-fa17-45fc-bf3e-b8ef21254fa8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
蛍の光 (ⅰ.腐草為螢、ⅱ.なだれ落ちるミメーシス、ⅲ.発光、ⅳ.寂寞の荒野)
くじらの歌は聴こえない (ⅰ.淡光 ⅱ.深海 ⅲ.跳動 ⅳ.黎明)