Number 10, #10 or variations thereof may refer to: 10 (number), the natural number itself 10 Downing Street, the UK Prime Minister's office No. 10, a standard envelope size in North America Ficti
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 0x8213ee01c7772d33fc9583c77e6468ecf147ea33ad9399dd69e6d79af8867cbf. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0633ddd3-315a-4142-b912-44089f5c38bc.json and https://artists.proofprofile.net/proofs/artist/0633ddd3-315a-4142-b912-44089f5c38bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).