Peter Palus Cosey (October 9, 1943 – May 30, 2012) was an American guitarist who played with Miles Davis' band between 1973 and 1975. His fiercely flanged and distorted guitar invited comparisons to
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 0x5b7e49bce30047b355b07176d8b50757de2e546dee032ecafb4a2a0bd6dcd030. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a239c60-7a58-48e5-9aed-c6317689558e.json and https://artists.proofprofile.net/proofs/artist/9a239c60-7a58-48e5-9aed-c6317689558e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).