Sine Merrild Bundgaard (born 15 January 1970) is a Danish soprano. She was born in Aarhus. Educated at the Royal Danish Academy of Music and the Danish Opera Academy, she debuted in 1999 at the Royal
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 0xb0bc939e90da8f06a55bdf7d53a3cff70233db3fc430a2b0eb10329e6dcdae07. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/800b08e1-9a42-4935-8022-55c0ad0cd816.json and https://artists.proofprofile.net/proofs/artist/800b08e1-9a42-4935-8022-55c0ad0cd816.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).