Phil Urso (2 October 1925, Jersey City, New Jersey — 7 April 2008, Denver, Colorado) was an American jazz tenor saxophonist and composer known for his association with trumpeter Chet Baker. Urso lear
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e09b10c2172620fa7338dcf9f4da1aa1d91cc704eb4c23222ccd2fd728717b. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff60265f-4b7b-4079-9527-360e08902035.json and https://artists.proofprofile.net/proofs/artist/ff60265f-4b7b-4079-9527-360e08902035.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).