Julia Bauer is a German operatic coloratura soprano who has appeared at major opera houses and also in concert and recital. She has had leading roles such as Zerbinetta and Lulu, and was Freia, Helmwi
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 0xbac6bf59d36e1f4f8f9f4490a8221e7aba500f03b49c7d18e0ad32b90e78391d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ea53153-ec67-450c-bc06-a9f8d9042293.json and https://artists.proofprofile.net/proofs/artist/5ea53153-ec67-450c-bc06-a9f8d9042293.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).