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 0x59d3596cf5ca6e7fe09d13feec6de75d106acfbf47476f4870b553821939bf01. 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/77a8c1b3-be60-4ec0-995c-f2eb73e327ff.json and https://artists.proofprofile.net/proofs/artist/77a8c1b3-be60-4ec0-995c-f2eb73e327ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Karaoke Machine Presents - 1960's Karaoke Platinum Vol. 14
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The Karaoke Machine Presents - Karaoke Hot 100, Vol. 19
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The Karaoke Machine Presents - Karaoke Hot 100, Vol. 4
The Karaoke Machine Presents - Karaoke Hot 100, Vol. 16
The Karaoke Machine Presents - Karaoke Hot 100, Vol. 8
The Karaoke Machine Presents - Karaoke Hot 100, Vol. 14
The Karaoke Machine Presents - Karaoke Hot 100, Vol. 11
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