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 0x605672993642984395a587d6409196886cdeba7887be5be077fbfb63441cff55. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/740c7813-2350-4cd6-af6e-ddb6a0cd39f4.json and https://artists.proofprofile.net/proofs/artist/740c7813-2350-4cd6-af6e-ddb6a0cd39f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lee Su Mi Solo;Girls' High Teens / I Guess This Is Love
Oasis Folk Festival Vol. 2 My Hometown I Left Behind/As Meeting Yeonghwa
I Want to Live Quietly, I Will Follow You
OASIS Pop Festival Vol. 6(Lee Su Mi Solo)
Favorite Collection I'll Shut It Out of My Head
Complete Collection of Lee Su Mi Original Hits