Ursula Buckel (11 February 1926 – 5 December 2005) was a German soprano singer, known for singing works of Johann Sebastian Bach. Career Born in the Thuringian town of Lauscha, Ursula Buckel studie
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 0x50d5852654b02f8bd05cf9b3ae5f2d93c74dcf65fdeacfc71450819018edf924. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ece70e2-7dc7-421a-b324-154a5cb4e392.json and https://artists.proofprofile.net/proofs/artist/2ece70e2-7dc7-421a-b324-154a5cb4e392.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).