Arthur Weisberg (April 4, 1931 – January 17, 2009) was an American clarinetist, bassoonist, conductor, composer and author. Biography Weisberg was born in New York City. He attended The High School o
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 0xa990b704844c39475bd544926d4d791fe7b07499a6085cc8cf42924df1c4f6ea. 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/743002d7-4995-43d9-83ee-d03058c62eb9.json and https://artists.proofprofile.net/proofs/artist/743002d7-4995-43d9-83ee-d03058c62eb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).