Robert Avel Holz (born February 3, 1958) is an American drummer and composer. Holz was born in Syracuse, New York and resides in Los Angeles, California. He played with jazz guitarist Larry Coryell'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 0x3b005a7c3dd7f0e5d9d5db47acf487175c46cf722722df3584698ee7b4a0be62. Chain 2 (Bitcoin): anchored in block 953854 (2026-06-15T23:16:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02af3ac5-c061-4fa2-bd4b-da4f1f94fca9.json and https://artists.proofprofile.net/proofs/artist/02af3ac5-c061-4fa2-bd4b-da4f1f94fca9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.