Brasstracks are an American R&B-hip hop production duo based in Alphabet City, Manhattan, New York, composed of Ivan Jackson and Conor Rayne. They won two Grammy Awards for their work on Chance the Ra
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 0xa0874ecda3a5dc3d9b151e9a6f3d0cdf81aa36121d80208b7153b88f46b18f1b. 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/5c35743a-3e67-4880-8d6c-98d695243c87.json and https://artists.proofprofile.net/proofs/artist/5c35743a-3e67-4880-8d6c-98d695243c87.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 0xe15b7de9e818ebe7da7f58651f0d2579ea29528ab1fc60eb0fdf7ec17fea67b7. 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/QZPLR2340023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc212bcab53de20867fa36cfce339e0cf3a37fea80accf34729e740552a87cf3. 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/ZZOPM2003076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7734ec1c6ac6b3eb357ea28eea9af86ce32ef2cc5ff08d45a59e7931f3d76f. 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/USLZJ2423462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d3d9616448c8a4d645fab684844e20bc1ed4aadb39d7dc5591d1d11fa71f95. 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/GBKPL1831655.
All The Way Up (feat. Lia Ices & Brasstracks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a678b4ade030d26d284abd0aac00894d660c9536966129703493b20df82efb0. 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/USZ4V1500131.
And After That, We Didn't Talk - The Remixes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace9d23429b664dcb79746ef50f6313d6ab39800406ac99bd143e470f6c09e7c. 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/USRC11601190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7481a3c7b7a674789110d4e2f84659eebe21ebf1f1794f24a6c5bb0d98cbc992. 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/USUM72010018.
Golden Ticket (feat. Masego & Common) - Jarreau Vandal Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d73b98652ee1ceb20efb9f6816dcdc054c93827ad25d5ef4d03a82762b0229a. 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/USUM72018045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ad79d8015cc1cf20595562ccddf4b63724370566b2807693521c365bd9a272. 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/GB7QY1500569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79809d3896f6feb0d7b062c1d01943867ba3eec95b8a192b499321eb8116ffae. 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/FRU701601002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17466cb870d02c08667b636189dfa422c8104459e4ab3e8d6ee8678dd526329. 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/USA2P1837975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834f6a31df11bd4fb3618deb2b41eb8e38f920620cc01e52cc0851478089ac16. 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/USA2P2126454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31d16b745f7ca5a0f49fd4c67c8126cd6605edac1c8578ff05998f79c24408c. 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/USQY51766105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45daa4314600a1b02e6e893946ce5ae9f6e25dc7d7a7f040ccc64345a9c17808. 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/USA2P1690266.