Metro Zu was an American hip-hop group based in Miami, Florida, formed by Lofty305, Ruben Slikk and Freebase. They were later joined by Poshstronaut, while members collaborated with artists such as Li
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 0x79c564f2434829f716079d69173bae3f575816342dc98d3eef2d56d5478970bf. 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/f23129c4-521b-424d-a664-0b893048ddc5.json and https://artists.proofprofile.net/proofs/artist/f23129c4-521b-424d-a664-0b893048ddc5.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 0xc9faa5077ffbdc891563d628b6cd63733d22ff57e9e78367ca9cb9d862e8fb55. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USQY51742009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74566b9ca6703b1f2a55771c335cf4f1286afb525b4691e4089829e0aab9dfcc. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/USQY51742010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae32152fdd2129bb4430e3f8004f61efe718ddee43609c45fe1a176f47b7511e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USQY51742011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee70c024577e4ac89c39e28e07e7e024ef9e6a0969b0f2195e93864e19a2bad. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USQY51742013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef625a68956cd306d922afbbf884e4ce90c49342970541dfa4b70d41d401b37c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USQY51742014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7a9f48940b941969ac68900d69699670100c902f30c191f19073aff0c34f73. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USQY51742015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf4ab1dfb1382bb08a2693cbedf5b71e8d568a55fc0900e0303888d94ab5df1. 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/USQY51742019.
MetroZu Tropical $uper$lo Galaxy 1st Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f8990bd76f492eca75b06128a58e45576b735b63aca50ebdfc8994826b023b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY42541466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ec0bfb33843cb3aac52aa69b6465f6594a1dab7d1b4e692b760715ffdc35cd. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USDY42541468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f5cf2a859c54a270b02288238ba9ab0fb504fc0e85b6b74f877822e0e4d50a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USDY42541464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72c7a1683e021cd1564c55c83a7867a89f5385e004011b42be293366cc4aead. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USDY42542142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19630111960d974e48824b3133d25806a3274fdad99357e95ce81bcf64c26957. 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/USDY42542151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d38c3984a70915a63572f4967381a91847aadd87d70b1b369e13a8a9e70a3f. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USQY51375884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb908daa1e67dd8f8c7e0d1a8df1898f8718a6c08be771a9937eb3db931d99b8. 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/USQY51375890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dacbf0f8c34bf5c31aad97c0717deb11b4528de6ef2123a793966485de91b4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USQY51376042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23837b699db8f36479247651078ee3f29cdce979b828af8fa437fbc8c7b84e7c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USQY51376043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5408fdbad7662cfc2e787977e2e0199d31fa7a42725018c4cd77731cbd133636. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USQY51376044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51ba9754b7bf6d3d0ba8b2f2b65392c65a41d8035d60491bf61832dad0d9313. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/USQY51376048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2113f8da65742fb9e7593dd4fd1b3119d2e84298beb077926c9ea1250d28c6. 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/USQY51376051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9072f210c8a07ce75b78c8ce7ec68e1b776608d81a3fb59aeeaa937ce4da294. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/USQY51376054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc304ae3a86931e8de39e00da5c55302559d971b26b7350661538995df3d3fbc9. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/USQY51379858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8f9c2439b5e453f40e3e6eb947475b046bcff18da69b72c3d5c00e750f05e5. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/USQY51379860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d78169c5177067d2baf00dcf3361b700922ad595ef18a5c1564da43078cda0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USQY51379861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee565a2e8314847ecb3cc31d815c0ec5b9aa645a8b15238d51592e594eb312. 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/USQY51379862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f015858471ff304c3585bf80f21268c507bfcfde84bc51e2f7f5f2c9e14e6c. 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/USQY51379864.