thumb|The Jazz Passengers The Jazz Passengers are an American jazz group founded in 1987 by saxophonist Roy Nathanson and trombonist Curtis Fowlkes. Alongside musicians like John Zorn, Don Byron, and
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 0x1d68972316f4fa3892a2b50ea33cdd9a859f5d43ec7aab96dbb4948c9a3acc5d. 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/5868761c-586a-4090-aee0-0f1eae58a090.json and https://artists.proofprofile.net/proofs/artist/5868761c-586a-4090-aee0-0f1eae58a090.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).