Mason Durell Betha (born August 27, 1975), known professionally as Mase (often stylized as Ma$e), is an American rapper. Best known for his work with Sean "Puff Daddy" Combs' Bad Boy Records, he signe
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 0xa8a8734fc99028e8943833d626b50d44ffba3211d09d3c06f4b3a73a40724997. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d6ed239-f29c-4d3d-ad55-ca18d1dd3a71.json and https://artists.proofprofile.net/proofs/artist/3d6ed239-f29c-4d3d-ad55-ca18d1dd3a71.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 0xe6b4ec7b127a3840e7932492f581898f6cef48484f0dd2f119b6372db0e36a7f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DELJ81598055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f61427f791d7de648f54fb4b2efb3236f1874208bac55883e68b72f07ee230. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DELJ81598056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2583b0d5ef317db4346fe12cc2355918fbe76ca7732ca34f3f1b6c1aa70c84aa. 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/DELJ81598057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e538b1d95e103c634cdab3f92c0044a7ffa68045b4a5dc4f7491e2ce9fdf87. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DELJ81598058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b37681411d4b7309bfbf88019966e051a745c14b8e0b3abd693e2a0c08d10fb. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DELJ81598059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf639e92307813a48bce9e8b423731319b271789b6efea0a2692ba0677aa2beaf. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DELJ81598060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4284494eb6ade9d405ad95b4ceb02d1438cb6a13c19becaf27f6c3bff546f76f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DELJ81598062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdc16ab070588102a098fc19b8f99672eeb4f1216bee96b367c57edb57cfdd6. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DELJ81598063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2064eae2d2887923e2326f9665667a44721e63ed45c7cb18286d4b8b97587c1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DELJ81598064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664dcc8a9759d27520a95d39ff20a1dc3a37ece3bebfd0fb88dda187f5bea6ec. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DELJ81598065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd974cd9791141e9f9be345485f70006733aed5244713b64846727e0e4cf13106. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DELJ81598066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a46c11f961f5aa173230f96a57cd5b7baefc9ea6619d992fd65f0552b822c3. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DELJ81598070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a37b0251d5b2db39698969b5203f4bb3d08b8428dbff62bc147fada3745d1b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEYX82244886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885100d54df331b6bd3ec4474d69baafb0127f06ce9c12bda14587912897ca3a. 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/DEYX82244882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851b61e68e2c00c2c59ce4eb4d3857a3761cde282fafdd5ce757f1d15708fe93. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/DEYX82244718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52733d84136b595e82a052b03d48a3e4b6a53af508fdcb1a63d6d812c385948. 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/DEYX82244742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa860912991025c95dcb76433d2094227b3d7765c242af01d4eb376366e562d86. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEYX82244735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dea8a99497c33466a63c354252b42135e5b03052ed72d76dd1e8829223eadb0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEYX82244747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9c860059166599f23804ff3f0b2b85b83b7aee0c0227247c6840cc2bacb95c. 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/DEYX82244741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6867018774035042b3f6f5cd7e358f37e3b2b37adc7d5945cdad5a3f8242281c. 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/DEYX82244733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01452137e95088fc88a30abc1bab11f723f72fb1afa61f38a7be3c4ede343742. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEYX82244736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22922d0337fe6be3aed71d9897badea1617819ab2bbbb9cba89a2bc7f2e15e2. 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/DEYX82244738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18aebadf8fc47684c29234f7ed476f0ba47c8dd056d5816ce94f196ae4bd901c. 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/DEYX82244734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483ab9b7f8863d02b46db49a7a8e741ce258573d08da38901725b5608fd45dbe. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/DEYX82244739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41681345f40c9ebb44c3b5793d4190b22998babb590c921c72bd57b8f48a567c. 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/DEYX82244737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fd31b6fb8681e9b38643cfcbe36e288b56e460f6c9f56d7264d306994b7826. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEYX82205864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7cfeaf7330c883de99e605934767e029c56d50836e5733ae3091c982067b14. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEYX82205875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cf77583b05609661e261cc200bc8fa6ae5e14c321c5d1d85bc5a722bd62c4b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEYX82205866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb132d173e146e12b03acb52fcab0068b7e856d5cdf82572842c28ad44b177e19. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEYX82205873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1394fdbfc6d3e7afd5416381a506ead9df462ffe65108db23f6f940e0b4b7f4c. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/DEYX82205865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b0e47ff52041efb04f46056e603da5212b9d2a76d6f035ac242dc3b1c19695. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEYX82205874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7c5d3acafd93d3177464e0cc4ad2cc8d56173d015ad63ee241c4d052da746b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEYX82205869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4514d8992349a47bb914d29ef4f2245fa52ae86718d8d3ed6583846b197de265. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEYX82205867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54d021cc98aa19f633e1a37ff7b6660d78862ecad0a68f9f6eca1f48da6af8d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEYX82205872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e80fa56e1c4d1572c6d1b009a0dd9734944df6422be9731dc9932d160fe9cb3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEYX82205871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5a09b6c711d8f427ef259f1864012c1d3098d1eaefc313d61e5286360086da. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEYX82205870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1784fb63725257e1b5a23610f95aecc6f04b665a3d84b6c42cb112a54adca83b. 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/DEYX82205868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b554456443a5195510cdc8acd574a4de165e7e7d79dd31d6e0e45355300758d. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DEYX82205863.