Đoàn Thanh Lam (born 19 June 1969) is a Vietnamese singer. She is one of the four divas of Vietnam. Biography Đoàn Thanh Lam was born in Hanoi to music composer Thuận Yến and traditional music artist
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 0xf7bdbb61a4ce9a63d9c47ff7bc9a58c0b4c3345de4c9bb2b84de5ca06d867bf8. Chain 2 (Bitcoin): anchored in block 953933 (2026-06-16T11:13:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2066d0f9-39b2-4bee-94ff-248625ff83df.json and https://artists.proofprofile.net/proofs/artist/2066d0f9-39b2-4bee-94ff-248625ff83df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).