300px|thumb|Dale Spalding (2018) Dale Spalding is an American singer, harmonicist, guitarist and bassist, best known for his works with Poncho Sanchez and Canned Heat. Biography Dale Spalding grew
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 0xa27505b9babb5b4b54827cf491f02e7b7694ff3d24461806e41182847e344c85. Chain 2 (Bitcoin): anchored in block 954032 (2026-06-17T01:59:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3af5e2b0-5601-45e5-a2f2-5ec1cca7a1e3.json and https://artists.proofprofile.net/proofs/artist/3af5e2b0-5601-45e5-a2f2-5ec1cca7a1e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).