29 may refer to: 29 (number), the natural number following 28 and preceding 30 one of the years 29 BC, AD 29, 1929, 2029 Science Copper, a transition metal in the periodic table 29 Amphitrite, an
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 0x736e9bc66f59af13b843cb776daeaa4cca06bb57419e67ac73fb138c95b64f67. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec61e0e5-6948-402a-aaee-3490ae91f8ff.json and https://artists.proofprofile.net/proofs/artist/ec61e0e5-6948-402a-aaee-3490ae91f8ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).