The Singer may refer to: Film The Singer, the English release title of the 2006 film Quand j'étais chanteur, directed by Xavier Giannoli The Singer, an unmade biopic about Héctor Lavoe The Singer, a 2
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 0xd7895d7f1a7a8ee3b6219cce9a15ff8b5cbdf5ea6947ff4a74eae353743af737. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5263f61f-ae05-443d-be44-b119f73f6468.json and https://artists.proofprofile.net/proofs/artist/5263f61f-ae05-443d-be44-b119f73f6468.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).