Sarah Caldwell (March 6, 1924March 23, 2006) was an American opera conductor, impresario, and stage director. Early life Caldwell was born in Maryville, Missouri, and grew up in Fayetteville, Arka
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 0x0a7090c9a9dcac253156ac0f7a25ad00aad9abe136c28a1f47992d5081917d9a. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09a71114-b454-4b8b-9c1f-2e5145c322eb.json and https://artists.proofprofile.net/proofs/artist/09a71114-b454-4b8b-9c1f-2e5145c322eb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).