Roxy Coss is a saxophonist, activist and composer based in New York. She is the winner of the ASCAP Herb Alpert Young Jazz Composer Award and has attracted attention from major music magazines and org
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 0x88061b7acc4236b5ade1b1647d2529ffc3ca7c59ee6ef9c44c85bf1b72b24f99. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35b1e022-6cbd-4966-9fb3-eeae915cc23a.json and https://artists.proofprofile.net/proofs/artist/35b1e022-6cbd-4966-9fb3-eeae915cc23a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).