Joseph De Lacroix "De De" Pierce (February 18, 1904 – November 23, 1973) was an American jazz trumpeter and cornetist. He is best remembered for the songs "Peanut Vendor" and "Dippermouth Blues", both
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 0x421144cad267ecc2dafadee1cdba3d44aeccc8f4b70f24a894abfcde97bc6308. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af373697-a0a0-4bbc-9078-9a1312f2f0cf.json and https://artists.proofprofile.net/proofs/artist/af373697-a0a0-4bbc-9078-9a1312f2f0cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De De Pierce and His New Orleans Stompers in Binghamton, NY Vol. Three
De De Pierce and His New Orleans Stompers in Binghamton, NY Vol. Four
De De Pierce with Billie Pierce in Binghamton, NY Vol. Two
De De Pierce and His New Orleans Band 1963 / Billie & De De Pierce 1960