Guy Marks (October 31, 1923 – November 28, 1987) was an American actor, comedian, singer and impressionist. A familiar face on TV sitcoms and variety shows of the 1960s and 1970s, he appeared regularl
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 0x3558b15fd4e7d4b65fe80f0ac1fd36128de0efb7ae221b261f55ac7dfee1d5fb. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c33cca52-6893-4ec3-8a85-839b595f5c2a.json and https://artists.proofprofile.net/proofs/artist/c33cca52-6893-4ec3-8a85-839b595f5c2a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Young Love (Live On The Ed Sullivan Show, December 13, 1970)