William Boazman, known as Sonny Black, is an acoustic guitarist based in the UK, who plays blues, rags and original compositions usually fingerstyle or slide. "Sonny Black" is a pseudonym adopted when
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 0x71caae006c1e680baaceec27a3d7e090ca2516f99074d7887ca9be1bc8e8af5d. 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/e67ad751-c7fe-4a5b-aac0-493494f0f94b.json and https://artists.proofprofile.net/proofs/artist/e67ad751-c7fe-4a5b-aac0-493494f0f94b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cash, Koi Fish and Bongz (The Street Album)
Mo Tha Hustla Presents: Sonny Black Fame Trap 2
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 0x763f61505cfd9479c3923a0608c12d6f6089875994c4b59b6263fd6955d8dad2. 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/DEFZ70900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6228227becdefd2e8570ab2ce42e0f385502030cb3e83503a571b0f25cd0f13. 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/DEFZ70900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9ec1b15216beaf9192927c6e930757e79c898ef59b4104aff0f90b6103b6d2. 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/DEFZ70900161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eb684abaed76b19223d09d6ca94b88f5dd1888839fae6dec8f0a90f9c70699. 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/DEFZ70900162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f3528106fa52fa9ca71b7ddc75f910a5945a108360ad1ea649bca464747e6f. 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/DEFZ70900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb818763be942c988fd872bfcb5b5236909a088b2de94b0f3330e6012eb7584. 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/DEFZ70900163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4de62390ffbe8ee11ca7b750d2c27f547eecf3fc06553bfc26a083bdaa99bc. 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/DEFZ70900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb409ccfa322287060b6aa8e3705bdf0d0b0ab614cf28b09210429e3c070b76f. 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/DEFZ70900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2957a296e16afc338251cdb0ca1fd0c160824e07644a82ba67fff7c252ad01ed. 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/DEFZ70900166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3016c0881d029a8bf6e14f106a036fe25095a6811cb4e93ce9adfd5cf6e09ac5. 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/DEFZ70900167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f9e2519a9b79cf2d206ba0072d196a23c3d780acba229a8e95ed1a243977ae. 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/DEFZ70900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afd38abef889a372074ecde664205935237a2028cba1f46453d8efd8c24d259. 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/DEFZ70900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b6ce88ef54dfa474e374990336dd8cd0b3409f3f006a8cb032796d2d97a4e6. 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/DEFZ70900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4dc60d39e5dc46c7fdc80b001969e206fb794c81d5e2a7df355ddbb1ebb78e. 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/DEFZ70900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a289b3876674eeee49a6e28133068737f93095699a05d9b54377a4b7ce3ea4d. 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/DEFZ70900172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e28fa6eb5429648d562242842ccba533d05e696e18e279af3be35fdb8404f6. 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/DEFZ70900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe28f54d5da82e1911675662828edcb8f566af49a63ee9de460df44031345d9. 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/DEFZ70900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdcde32a2cd69e066931c67d4d810d5ce780fb8ed1b59d5c4a865a16deffcbe. 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/DEFZ70900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842a2a1e15ce0a403c67dbc50f4fc3628ebc24d2bcc04f3283fe05edce537913. 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/DEQ121536210.