David Joseph Madden (December 17, 1931 – January 16, 2014) was a Canadian-born American actor. His most famous role came on the 1970s sitcom The Partridge Family, in which he played the group's manage
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc98ce6889144069169c501102560ad2fc5630e66cd4f5b9b78545d5d707480. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ade4c247-3cdb-4987-9dd2-63a6640a71f5.json and https://artists.proofprofile.net/proofs/artist/ade4c247-3cdb-4987-9dd2-63a6640a71f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Insecurity (Live On The Ed Sullivan Show, November 3, 1963)
Steal The Naughty List (Original Motion Picture Soundtrack)