(translated in English variously as The Sleepers and Sleep) is an eroticDorothy M. Kosinski, Gustave Courbet's The Sleepers. The Lesbian Image in Nineteenth Century French Art and Literature, Artibus
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 0x9088ab313f3e880515dd2f4624ab7577cf4e894e130ec293878fc701b20b7065. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b86c511-0101-4f9c-a657-07e43e578782.json and https://artists.proofprofile.net/proofs/artist/8b86c511-0101-4f9c-a657-07e43e578782.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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