Prototype 909 ( aka p909 ) was an American electronic band which was composed of Taylor Deupree, Dietrich Schoenemann and Jason "BPMF" Szostek which was formed in 1993 in New York, NY. The group was
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 0xf91f7d8a6bb4ef45b5c9cd7ea3c8bdafbef3306f195966fc77ef0d4aac1671c5. 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/92c94637-1b1a-492f-aef6-97e98eebd6fc.json and https://artists.proofprofile.net/proofs/artist/92c94637-1b1a-492f-aef6-97e98eebd6fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).