Joseph Black (February 8, 1924 – May 17, 2002) was an American professional baseball pitcher in the Negro leagues and Major League Baseball (MLB) for the Baltimore Elite Giants, Brooklyn Dodgers, Cinc
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 0xeb94b47ea438bec0581d1220c5994e9d573f815a8feb0b6d9811973c99c65621. 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/ff173bbb-2b10-4f15-94f3-bb95ce7592ba.json and https://artists.proofprofile.net/proofs/artist/ff173bbb-2b10-4f15-94f3-bb95ce7592ba.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 0xa611436d42643ad27d3f7af1f7538888d85318d73fc753dce65d979e33983da3. 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/GBLFP1816087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9aa88dd99ba06e344f63f058429a869e6f0f24857aee0c19e0c3a997c61571. 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/UKXN22308026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf1f69b3c46cd3d545753bfd8300a4c4973a2e2e78920355b3a1eedaa99d789. 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/QZARB1897528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71d6a56cef9d97cd1600ca161a6ee6467d67da240b84b400a8f56d96659a850. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZARB1897529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770339e862ab7a537055d67d8dbddbfbbcb3a451a5f63268a6836d70a36fba10. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZARB1897530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080e03632aeeec84c9070a136396e3f4015aef20b9e600b5651280b84077ae54. 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/QZARB1897547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3d07767fe4c16d535fe325bf5af643d5f01fe7e21f02dbbacb9af746ff5819. 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/QZARB1897550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446494b0702ef40acbadadfd9c02636fad580d0f9370b80a9dfd84a7052ca371. 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/QZBRF1808132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3001d64a09f6c596d8f62a5d632641d131a22273b29554c5f3147485538fad. 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/QZBRF1808135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132abf0708f148f6b12960e00f434e58b45fd03665d4303e2c0a8b22061ae4dc. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZBRF1808137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33df1aa69444457bc12a6d659878fad95e3bad4d3d03c5950a78ac49d273fe30. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLFP1815843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035da41b272292e14827c558e0409aaac24835b1e79b3279132f6dc50cd5a8a3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBLFP1815846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4f79d12223a4a19bc6dc01f9a57230afe4a10460bb66cb9ce445b289945cf1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBLFP2001381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6284066fe830599259488119e6b2d1dd9c488cc2a725d3b0687f8da28f030b. 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/GBLFP2399827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f2ddd2801f7e7fab98750c91caa4fbcd0e4015d9e00a9a93e20672f338ec01. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJW2546590.
Make It Out (feat. Joe Black, Scorcher, Rimzee & Potter Payper)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f4654e2684e09ce8d7df5b5631b86c8dbfd0e0ce4281e7656bef59ae9042f9. 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/GBAHS2100708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d6b7672f11d634fc6b4cba765f97374f26dd6d4e4feab3c3351f7b1d280011. 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/GBLFP1942525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859fc928c4c7ce18692ef391474626324c5d9f201761ffa5281539fdba10e2a3. 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/QZTBA2335713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0696da98bae0b448e04d3a3c03d8e4f87dfd7465ced28058244bf8d764cce2. 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/GBLFP2255150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e794c3262d948719acb99dec74264fd55fd8afd28e3712bce963816a0df2b43. 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/GX3Q92364752.