Israel Baker (February 11, 1919 – December 25, 2011) was an American violinist and concertmaster. Through a long and varied career, he played with many of the greatest figures in the worlds of classic
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 0xa8b269352b1f17e2c8a46c93b9ffe1d63dc6642d44216ba4fbcdfacd4645c66a. 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/61d24304-0fd9-4873-98b6-4373ca6ac431.json and https://artists.proofprofile.net/proofs/artist/61d24304-0fd9-4873-98b6-4373ca6ac431.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).