thumb|Larson performing at SXSW on March 11, 2013 Jason "Jay" Larson is an American comedian, actor, and writer. He currently resides in Los Angeles. Early life Larson grew up in Stoneham, Massachu
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 0x5ada8551896e61cc66c66e14dd1a86b60051b4f8a1c02b902c67d9bf5c3c8621. Chain 2 (Bitcoin): anchored in block 954063 (2026-06-17T07:49:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47a67977-a033-43c5-ae01-197dc7658e3b.json and https://artists.proofprofile.net/proofs/artist/47a67977-a033-43c5-ae01-197dc7658e3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).