Azu (born December 8, 1981) is a Japanese R&B singer. She is well known for her collaborations with rapper Seamo, such as her first major release, the leading track from Seamo's second album Live Goes
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade1a0bcc1fbf600e2317df8b9ce58b7a11c9cbd5073791d4f9905037755ed75. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c008c00f-4d53-4f5a-b76d-61c662fb62b4.json and https://artists.proofprofile.net/proofs/artist/c008c00f-4d53-4f5a-b76d-61c662fb62b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).