Tandu may also refer to: Tandu, Linxiang (坦渡镇), a town in Linxiang city, China DJ Tandu (born 1966), German trance producer and DJ Tandu Khatun, ruler of the Jalairid Sultanate in Iraq Tandu, fi
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 0x32121e2023da02f642e51c3e8f0204ecd3451dde7fb409e2c51611bbd0575963. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67a87b25-3d95-4fc8-b28b-b22a803476c2.json and https://artists.proofprofile.net/proofs/artist/67a87b25-3d95-4fc8-b28b-b22a803476c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
With My Own Eyes - Tandu & Allan McLoud 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 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 0xd4ebd5457584ae7d5c3a9ce697d8a20b683edfb5b674d5dc43d4c2c12c4e633f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEH840000539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569376d3c4db2edd827935340361e294e43f429ed9d655ebf8687fa85899c98b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYE9900575.
Played-A-Live (The Bongo Song) - DJ Tandu Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe599bb023008a09ba98876ddb20f11bb179ddc33669f52677f254d69d983ee2e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKBKA0001606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea34c487599e6969c4590c35d7b25cdb2cb5a26c9729953e028a2ae8e31df4c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEA312301073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc0fb0aee7e83b246393141e693bd8996040cd22b6737bb5f809f12f4191bbf. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEK979811050.