Art Lande (born February 5, 1947) is an American musician who was born in New York City, United States. Born in New York, Lande began piano at the age of four. He attended Williams College and moved
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 0x3a185ba8ad8c342da0979714adf1e67406b66111db4c2b4f7a887264595910f5. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c25fb135-e3b4-4d7c-94e7-cdc4f568c699.json and https://artists.proofprofile.net/proofs/artist/c25fb135-e3b4-4d7c-94e7-cdc4f568c699.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.