Helen Francesca Traubel (June 16, 1899July 28, 1972) was an American opera and concert singer. A dramatic soprano, she was best known for her Wagnerian roles, especially those of Brünnhilde and Isolde
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 0x9c7746958c53ac63f110b43323f6bc587b88323ddd1084ff83846b111b61a896. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cacdc1e1-f29a-4cd2-9306-e6aef6bbc1b5.json and https://artists.proofprofile.net/proofs/artist/cacdc1e1-f29a-4cd2-9306-e6aef6bbc1b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).