Dadju Alimasi Nsungula (; born 2 May 1991), better known by the mononym Dadju or at times Prince Dadj, is a French-Congolese singer. He was signed to the label Wati B and in 2017 signed with Polydor
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 0x7a26f044d0ddb3a6c025745f3da77fcd6e9fbd0e1afc4ddb8086a3e7931ed187. 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/6936643c-cb6a-488c-bfc0-6b45b8438ba4.json and https://artists.proofprofile.net/proofs/artist/6936643c-cb6a-488c-bfc0-6b45b8438ba4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xc7cae358a608b43356a3cb144856d1b24b0924cd35eaa6a49f0cb0aafd19117a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR8FB2328300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8481a8de86e272142f64431a6bca14a64421d1893f7bc6da6414cbd127cd9551. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR8FB2329420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd3a66eb016a0f58cef282704daf893bb2f6f76bff45b417a1ad766e12b022f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FRD3G2301111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b97275861b02d6358ab7b5ef98e9d0341b137bc8f8e73c7b271d72951780f2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRD3G1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce9965edef35b6f531858c626758b4f8b3fc151e86e2aab1863c9fa248c8eb4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRUM72001256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1d6b1b476f8511beb5a6ba035f5e990e412bc19b29365efeeda53649f1672e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRD3G2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eef42d95fefd1bf9b1765809a5e5e7c4164e2fec2397a0f95630f9275078a6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRQ852200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1da24bc3c2c8dda65ade210e44a15bfe360858d69f1bb88633454ebdc5b8ba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR1A91703746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eef42d95fefd1bf9b1765809a5e5e7c4164e2fec2397a0f95630f9275078a6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRQ852200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20e282562d19b61f564cae5ceb0b791674eb6b928991ace036d76d83797a9bc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR8FB2118490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20e282562d19b61f564cae5ceb0b791674eb6b928991ace036d76d83797a9bc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR8FB2118490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb8cec7375648bfe6e424072589689e043ab68c373f7d8383cc4887d0ff2cba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9IX2301580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb8cec7375648bfe6e424072589689e043ab68c373f7d8383cc4887d0ff2cba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9IX2301580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209f6416e7540ab2f167192b778ec948b2bbd62f53cb6eb278a21c2ed65a4c1c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADG1797420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e357432637ba1b91783cf3e4071c716dc76411b4a7e2efcd61328ed8b383ed1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRD3G2201010.
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