Mary Ann McCall (May 4, 1919 – December 14, 1994) was an American pop and jazz singer. Aside from solo work, she sang for Charlie Barnet, Tommy Dorsey, Stan Kenton, Artie Shaw, Teddy Powell, and Woody
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 0x4630edd96f71d01279547b762a79b24682aadb8685eea3ae1bf808ac1fba2d2b. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe0a87dc-ced5-4fc8-8cd0-39217582655e.json and https://artists.proofprofile.net/proofs/artist/fe0a87dc-ced5-4fc8-8cd0-39217582655e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Top 50 Classics - The Very Best of Mary Ann McCall