Indigo Blue is a 2005 children's novel written by British author Cathy Cassidy. The book is about a girl named Indigo and how her life changes as she, her mother and her baby sister Misti move to a ne
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 0x63bbfbc11d9afb7562e5308a34a7283b7a506720c62c72d30bd29f41191c6d14. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d47442b9-83b3-4f67-ad0d-dce6850187c4.json and https://artists.proofprofile.net/proofs/artist/d47442b9-83b3-4f67-ad0d-dce6850187c4.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.