Savannah Churchill (born Savannah Valentine Roberts; August 21, 1920 – April 19, 1974) was an American rhythm and blues singer in the 1940s and 1950s. She is best known for her number-one R&B single "
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 0x87a1f4242efce18c7e3634a354b4c988f34483349dbc754a4265389563183c56. 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/66f16731-4c44-4ac4-af7c-3b1b3df7d487.json and https://artists.proofprofile.net/proofs/artist/66f16731-4c44-4ac4-af7c-3b1b3df7d487.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
(It's No) Sin / I Don't Believe in Tomorrow (Mono Version)