Looking for Alaska is a 2005 young adult novel by American author John Green. Based on his time at the private Indian Springs School, Green wrote the novel in order to create meaningful young adult fi
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 0x0ab0e5976bb30ea50af43321e34836ebfa36d0e8bfc5a8c55408ebb831c54abe. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f71ce260-a969-4166-a2b7-2cb3dd12c464.json and https://artists.proofprofile.net/proofs/artist/f71ce260-a969-4166-a2b7-2cb3dd12c464.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.