Unk or UNK may refer to: Unk (1982–2025), American DJ and rapper , the ISO 639-3 code for Enawene Nawe language UNK NBA, a clothing brand UNK proton accelerator, a particle accelerator near Moscow Riv
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 0x71ee7c00881d1e8a3fd91876a3005b1b837077eac6eb7e7e81acc7f5d0b1820a. 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/4db2d8f4-aa50-417d-8c68-e8bf00c72a6f.json and https://artists.proofprofile.net/proofs/artist/4db2d8f4-aa50-417d-8c68-e8bf00c72a6f.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 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 0xabc008a5c7ed5250571f4652b33b8dafccebc8aed1745318d9422b06d6f5f409. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USKO10601385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e62fc53950cb29ec849307e7e4f2ac4454a97a9e64ddd711edf5b97161600b3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USKO10601392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13078b3eb534c13696a1a5e9835bc3784a76daf33d6690dcd9ab815692ae2995. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USKO10601394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a19a65908a579e646596f09299f0ff77f2d2a798098ee7584dbc28beee64113. 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/USKO10601395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda54e24f68ec0c6dc61fb8034433c60687c754a1c037a09ce3658924974f1f7d. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USKO10601540.
Walk It Out Remix feat OutKast & Jim Jones
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbe4dd708e699d3282369413981e355ae3312e63f9413a4b5a8982bddb2f977. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USKO10802160.
Have A Toast (feat. Louis Rocc) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93d6c3a6f8aa419ccedf3e69ae286c85da08bcb036966137963a1a760d8e44e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USUYG1037294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc226bc37f0029ff0e17b972eca4f00f595e8e9b1a603e668c6c7c77eb5570738. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6XS2510096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a72ce2d23de59962daba5ab36a02e9d5411ae6db6509576ca40e3119c9a617a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZVEM2531409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0c53fefc9fbf7f91e4ebcd248e7a2cb9947423c843c251b17d2af7848ffe6c. 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/QZRP52318875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfabf3d6b77f438ef9955924db4332f56c15f6ffc026dbb0946b8c821892011. 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/USKO10802174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ac293fdad3270312bd70ff6964190b9de9a1390bc7b5393094469a968233d0. 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/USXQS1203399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45fc92c4443798100fe80099d9f7eb151ce5be9683463ed7dc28194714b0c9c. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USB4T1103586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda64c1b8dd34a45113dc42b77134b9d3034d33f045deaafa6e1b1ae75f1b1f34. 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/QMDA71571805.