thumb|Bassist Spencer Murphy at Smalls Jazz Club, 2014 Spencer Murphy (born 1988, Syracuse, New York) is an American bassist and producer, living in Brooklyn, NY. Education Murphy graduated from Ja
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 0xa97382f6cb891fc5df3d713b63cb9109f15459cae4d893302011f8f2cbd6740c. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21ed8f7c-e0b7-4dba-9c42-b0cb1606cfc2.json and https://artists.proofprofile.net/proofs/artist/21ed8f7c-e0b7-4dba-9c42-b0cb1606cfc2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).