Bob Florence (May 20, 1932 – May 15, 2008) was an American pianist, composer, arranger, and big band leader. Career A child prodigy, Florence began piano lessons before he was five years old and at s
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 0xcdecee74d312b92f65ba6696d611b25200ac49553357a4a69b6cf17514144aef. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bb73b50-1d84-47d7-a9b2-537637a3a5bf.json and https://artists.proofprofile.net/proofs/artist/0bb73b50-1d84-47d7-a9b2-537637a3a5bf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).