Elfa Secioria Hasbullah (20 February 19598 January 2011) was an Indonesian composer and songwriter. He was the founder of the teen pop group Elfa's Singers. Secioria was born in Garut, Indonesia, and
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 0x84fd1d4243ed9c383082b135cf7af07a5ac423bab541cc4b11b39c46aa3ccba1. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac83e1fb-a463-49f3-92c7-82f25021b585.json and https://artists.proofprofile.net/proofs/artist/ac83e1fb-a463-49f3-92c7-82f25021b585.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).