Papa Doo Run Run is a band from Cupertino, California, United States, that specializes in covers of songs from the heyday of surf music in the 1960s. History Papa Doo Run Run (PDRR) was founded in 19
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 0x4b5ecfd3d32907a839e7b7bcd7a08dae7cf85f8eb3ce47886e711996a913fca4. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52d75a6d-935f-4c69-b429-03ec08385720.json and https://artists.proofprofile.net/proofs/artist/52d75a6d-935f-4c69-b429-03ec08385720.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).