Polaroid may refer to: Polaroid Corporation, an American company known for its instant film and cameras Instant cameras, including Polaroid-branded cameras Instant film, including Polaroid-branded
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d5ede545ed4543efdbb840de0d331ce9690c33156c6851c3f30a9d403b8580. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fc3dbe4-c3ac-43dd-91f8-be6cfd8567cc.json and https://artists.proofprofile.net/proofs/artist/9fc3dbe4-c3ac-43dd-91f8-be6cfd8567cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).