Laura Groeseneken (born 30 April 1990), also known as Sennek, is a Belgian singer and songwriter. She represented Belgium in the Eurovision Song Contest 2018 with the song "A Matter of Time", but did
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 0xde60dfc66610c0c782deb7cc6ba382cf1a92bf7dd2760517f8e87475c8fcdd80. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c11de241-eb73-4982-8830-1d7b9202b0c1.json and https://artists.proofprofile.net/proofs/artist/c11de241-eb73-4982-8830-1d7b9202b0c1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).