Maria Spacagna (born 1946) is an American soprano; she is known for being the first American-born opera singer to play the title role in Madame Butterfly at La Scala in Milan, Italy where the opera pr
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 0x9b0d084870ff5b379a3b56cb4e93e7fe16bbf9ab18412c7326689c8a0af51dff. Chain 2 (Bitcoin): anchored in block 953930 (2026-06-16T10:36:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ec243bc-3a2f-42dc-a577-60cfde0d6a46.json and https://artists.proofprofile.net/proofs/artist/1ec243bc-3a2f-42dc-a577-60cfde0d6a46.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).