Matthew Garrett Champion (Born February 14, 1995) is an American rapper, singer, and songwriter. He is known for his role as a member of hip hop collective and boyband Brockhampton, with whom he relea
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 0x48d82c209e56285daecc7b792be9d9a70d722f8398f6c2d82ddbbefab3d2e771. 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/e7463bc2-6009-4e9e-905e-f60cc535e9cf.json and https://artists.proofprofile.net/proofs/artist/e7463bc2-6009-4e9e-905e-f60cc535e9cf.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 0x965f1d671333ed166ce2d4608d5ebc5d987d552fa0ca8dcb870bfe8ccecd3ab7. 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/USUYG1128426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27801e4f937eb15e242a5da08724f10dfd7198837b1b5dc2b4583e7f967297b5. 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/USUYG1124271.
Salud (feat. Michael Christmas) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774f7eadbf9aaf2120f1a039c7a8ed49d7ae6539d6e9b8e08d4365269cba3168. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1096150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7adb0257bff39adc13275ff34e8ff1376667931837a517316d89756e193660. 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/USUYG1098736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f83edde2d1c310e3a97259254c91e9deed9fad1930684725948f2cab3a7e4a3. 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/USLD90812249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5602879baacc55aff5cb3f5d09c08a1f96a5eb8b772a5cadb7a3d070e1a1a9. 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/USLD90811152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce65ddaedc8f6ac2f9df322e5ff4ea36f45b5cb4ff168e9ba131f7b9240123b. 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/USLD90810393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a8cd059e0d8d29ea8af09ce909e040cb4be1652726d3ca824e25fa4bee2523. 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/USLD90809170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e711a60f8364e9c4adcd99af4cfe18c84b460ca5da6ef7fe1278fd48b905e8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRC12400508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460a535448c5de55e61c04287314cdc7631162588982dae7790c99edf7c8c8a0. 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/USRC12400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03892ac675d24dde2fca1582b79959bb6757a2ff45bb7dba3e742434ad948a2. 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/USRC12400509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922a81bc9d130e2153fb46423a159301c876139d60c4d3801cab2142c5823117. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRC12400447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5cf0ce8d966a93e0552e9c73bd652464e3ddf0819247a594d6168f62bcfe32. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRC12400232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731610bb8642f7d5abe61504aca7d149cb4881bba09b17ee9cb9760041f7bdea. 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/USRC12400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e85deab0bfb0d82131bafeb486ff3e3bad8f7042cd7465668f4791d9533e11. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRC12400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965cc3fe45b0222b69329b3756d43fddcda4ccef8ad9abebf29a1255e6c9b285. 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/USRC12400446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452a3bfc6989b93c30196b94c25722e6747d8ffe2dbea07324ecac0d062c807c. 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/USRC12400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88fc9227df0f1a122788afd75442833b2b704f92881d4b2d0c78c642403b98a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRC12400511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e91ed40c450c91950baf55e839e48eb1a1f823bf77d8954547c60c19c30e95. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USRC12400510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791490949639e5639a942947716f6c7541a26e54da9ff749f6f027360d0b0290. 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/USRC12400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b614c02fa930dc7ec7da63416722ac22f1968b1eb48de74dfe289327dbc7909. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USRC12400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460a535448c5de55e61c04287314cdc7631162588982dae7790c99edf7c8c8a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USRC12400209.