AND1 is an American footwear and clothing company specializing in basketball shoes, clothing, and sporting goods. AND1 was founded on August 13, 1993. The company focuses strictly on basketball and is
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 0xbb25222d53ba7d9f3f333570d3f68101346b2518b7e35567fde083d9434d0852. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6abad8df-a65b-4d54-bd51-7ac574da53b1.json and https://artists.proofprofile.net/proofs/artist/6abad8df-a65b-4d54-bd51-7ac574da53b1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.