Club 90 was an American adult film actress support group founded in 1983. Origins In 1983, at pregnant adult film actress Veronica Hart's baby shower, held at fellow porn star Annie Sprinkle's New Yo
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 0x85c8945e860803dd1a13d5a35b4e0c7f88d937ae5172debe492ba587a5ab2aea. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/259cef09-dce1-416a-b00f-6a7f3d01ad3b.json and https://artists.proofprofile.net/proofs/artist/259cef09-dce1-416a-b00f-6a7f3d01ad3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).