Masta Ace Incorporated was an American hip hop crew formed by rapper Masta Ace. History The group, also known as The I.N.C., included Eyceurokk (Eyce, Uneek and Rokkdiesel), Lord Digga, Paula Perry
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 0x7047d03e04d9a97eebeb20aa22b9c881a49969f05751871fd4f24abbca953404. 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/61961e52-dbae-47a7-9190-cee6a2dda285.json and https://artists.proofprofile.net/proofs/artist/61961e52-dbae-47a7-9190-cee6a2dda285.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 0x9a589291392cc215c0a5ffca66b511f597aba5b18796f01d7f0617ce4a4c5afa. 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/USA370507712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc835332c00db1abd60c86bb52b3ad8941ccadc32e3f42a2766b3c745ee810dfd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USDE10801052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a589291392cc215c0a5ffca66b511f597aba5b18796f01d7f0617ce4a4c5afa. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USA370507712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740a02eb8bba653e2cb943f779b58b358781c59764a6c44393380503e5785a34. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USA370507713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0c669a0ca801c9da61fd3892954bfc91ff25662f0286fcd74cabb73f17c363. 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/USA370507715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e51f8181c99f03c349640087348cdcda568c32f632cb64bb764a06c78a44c1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USA370507717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc30bf940f0692764706abaa83cfa89f7cd7ef1b90af8377aa2d58446aa75a8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:35:04Z), 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/USA370507718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f03592ad4b918bc83d3a0f15de0d41b50fb158a4b2124c9fa88c5107e51b284. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:49Z), 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/USA370507719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c7df6ed3f7041f233fac00fe33e1734bd893c525fc4af96b7b1bdafba9260f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA370507721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846b82683b5dfe72c96cefe506e784f9baccdf60813cc9aed862f353e71ddf34. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/USA370507723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2488d5607230029c69d518592e3b88d9fab7ed6b80958a071e67b9f0746b6c96. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:17:15Z), 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/USA370507725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64af368e44d5ad026d3b63f3bef650012fa6503b5b2a33458be94e393abc1166. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDE10801057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cd0fe77fb4455d43ff5090012f36fb7374007b09297f4278e191aa71fd0ab9. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USA370513634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74c61813febcd90233cd2fcfe55b985806e5f41495d3c1b72ca0b33c76a8516. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMFMK1500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dad752a027b48cf3faa2059d470941c6a3b4bd1d62a782ad122f94df1eb800. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMFMK1500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624aab8f504b042592574720d8802feec28b22342639e878750607972816f487. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA370513644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe645d25cc1f44538fc3b2b18d599f585ad767fc7d0a67f804b1732791e4c9935. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USA370513647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1948d24504f01138af26825a6278565c1b5f85995115c05be52f5d66c3a66c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USA370513633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4ee405d99eaa81c150855f7e0880cd9e5f0e9566439e829fe1108ea7892f20. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA370513636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a69b8adf5f4ce7a7d49c28ff09bc79f950717b3f10dec271440866f84978286. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USA370513639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a58674aa092e92c4e1f1ed6ed3973e14c313daa057054156f242e375c831d8. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USA370513640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5ebc8f101629927e1ee576122a003b6070c655ff2cd3bf537c58c0e2d2a7d4. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USA370513642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62240c2d3fb1b16d7ba92803e67e1b63f6091a6230b0dcddc1e104c84e9eba0d. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/USA370513645.
Grand Masta (The Remix & Rarity Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106180608ecb289529070a6952b104cb62bc0ba9f0d101f84ffe1513234f04e9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA370513563.
Waxing Off: Delicious Vinyl's Greatest Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099b4fdf3af900bff9b8c690f4903e0004676df1d7db535ad5ef691ae94e34c1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA370513574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2bd5a97bf8517c752e764c31561785a53699d02677213df96dabd0175c5e3a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR0Z50036341.
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