Tutu may refer to: Tutu (clothing), a dress worn as a costume in a ballet performance Tutu (name), including a list of people with that name Arts and entertainment Tutu (album), by Miles Davis, 1
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 0x9362d3ca85bf2b5d5e43f1f7663cf46d0d1919d19bc99f73babab8e922d9e011. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcfc6156-ff5f-4d27-bbd5-2e9511f46bda.json and https://artists.proofprofile.net/proofs/artist/bcfc6156-ff5f-4d27-bbd5-2e9511f46bda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).