Nonso Temisan Ajufo known professionally as DJ Big N is a Nigerian DJ. As part of Mavin Records, DJ Big N has supported several of the label's top-billed acts, including supporting Tiwa Savage on her
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 0x13b56ea498c90df01943279cc558d5dcea1ac6a77521fcb8d89c1db5cf2f034d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea29e02b-fbfd-409e-8526-c1c4ba19c989.json and https://artists.proofprofile.net/proofs/artist/ea29e02b-fbfd-409e-8526-c1c4ba19c989.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 0x3163e883f8026760a4b9c163ebdd847954d6e4d3c27d2db3ee2beee960f862dc. 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/ZZA131609001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd34af0e1bc3b4c474aa70a84627bd89654f67ab107fb69fe27d3ef28063b01. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ZZA131609002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f10245c5351af0ee7bd76a3837e755f3e168e8f46fdae06acd6d7f42aa3193d. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:06:41Z), 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/NGA3B1709001.
The Trilogy (feat. Reekado Banks, Iyanya & Ycee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0a8a6384e409b3d19f9d38388f6b38890c97bdbd3533ae56f2da48565dfa87. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/NGA3B1809002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2262d4ddaf3d87edfc6670bba074a387d574db009f908037770e073781c473. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NGA3B1809005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b369a17a1f0422780d78e39c2bd6c05133c13641b3899ec5a7a89fb7fabbd18. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:28Z), 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/NGA3B2009001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30ea13c82e2976472349377c72d69ef42b4beca817aa684bd9969da21d915ff. 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/NGA3B2309001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2c515ae97810799cfbd9d3a217bfff25ade98be4a1cf1e0e7bdd1ffec90c3. 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/NGA3B1803003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aeae7291c203735fd216506e98cd70eaca089499f62fd991b31d94153ff3ce. 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/USUYG1499046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e8de55f507d52cf0a41fa3b8a8fad591dcc35e55e3c67afd8484908f5f7c59. 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/NGA3B2201006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889ee79df30458a9a6e656996383539fd60c1f03146f76fd51f5ed857cfb5efd. 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/NGA3B2201009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d29d98594b3b03c0ed5b0de6265d58c7459798e4cd8f79edfb3c3b9f47338a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US3DF1834582.
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