thumb|As E.via, at a performance on July 11, 2009 Lee Ok-joo (born December 6, 1985), better known by her stage name Tymee (formerly known as E.via and Napper), is a South Korean rapper, songwriter,
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 0x2afc237d3f56f1ff64baf47d11a6c57e9fd51e9b5475e5d332a32a017622a6f9. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8260e3b-4092-4a38-9528-c0d3b330fe68.json and https://artists.proofprofile.net/proofs/artist/c8260e3b-4092-4a38-9528-c0d3b330fe68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Extra investigation (Original Television Soundtrack) Pt. 3