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 0x911510646a9a274f4c8316281de8418e397ed0a6ed72a815aa90999bbd9e1f5b. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47cd35c8-74c6-4745-9a00-29f3c9d38445.json and https://artists.proofprofile.net/proofs/artist/47cd35c8-74c6-4745-9a00-29f3c9d38445.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lyrical (feat. YACA IN DA HOUSE & 式部めぐり)