thumb|Q and Q: Aristides Quarles van Ispen (, left) and Wilbur Quant () Q & Q was a Dutch television series, broadcast by the Katholieke Radio Omroep (KRO) in 1974. With an average audience of three
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 0x647d8e839e79dfdecd0e96776f7c7ab24dd0d7401c099d1c9fdf72e2143ede00. 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/39e3069f-3cf9-490c-99b6-330f02a2106f.json and https://artists.proofprofile.net/proofs/artist/39e3069f-3cf9-490c-99b6-330f02a2106f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Gente Come Noi: Pop-Rock Musica Italiana, Vol. 1