Dual or Duals may refer to: Paired/two things Dual (mathematics), a notion of paired concepts that mirror one another Dual (category theory), a formalization of mathematical duality see more cases
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 0xfaa8b91b3ed47dd8b1caddfc35a21dfec376b76dc3d18424f1d772533f271c8b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92268cf9-c4e3-48b0-bb2e-e2c1a25648b1.json and https://artists.proofprofile.net/proofs/artist/92268cf9-c4e3-48b0-bb2e-e2c1a25648b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lately I Don't Know (GUM & Ginoli Remix)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350de185b293899555381eb8c86b4ee4ec83ec98b6134a020f0b1fd89b3036f6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NZRI12001467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a3401d96f83fa6a9846dc5f09853f3a4e9da04586489b206a87cb8dfd50c2a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NZRI12202999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d074550614cd64bc0126e8ec611dfedc67a04ff1bec2be7466beec55cc27ebf. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:48:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NZRI12203000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec06b1513bbb43151fdc01dfec811458b6e2bc104db6fb997fd1d59dbafcb34. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NZRI12203638.