"My Dad" is a song written by Barry Mann and Cynthia Weil and performed by Paul Petersen. It reached #2 on the adult contemporary chart, #6 on the U.S. pop chart, and #19 on the U.S. R&B chart in 196
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 0x0ba4cda051ebb545fbd956ea1ffc0114c9aca40d70a0578d40da81574178c5c0. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d097d9e-cba4-4980-abdb-ddec5cc1a9b3.json and https://artists.proofprofile.net/proofs/artist/9d097d9e-cba4-4980-abdb-ddec5cc1a9b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).