Christian Garros (February 17, 1920, in Paris – August 23, 1988, in Rouen) was a French jazz drummer and bandleader. Garros began playing professionally shortly after the end of World War II, working
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 0x0fb8df1e9aee87cb2369012de7f4ae8be0ab0e769e691e0c2e2e2b544e799736. 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/5ee89f20-e2b5-4ecb-9fde-b10b5c0fcb28.json and https://artists.proofprofile.net/proofs/artist/5ee89f20-e2b5-4ecb-9fde-b10b5c0fcb28.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).