John Donovan Maia, more commonly known as Johnny Hooker (Recife, 6 August 1987), is a Brazilian singer-songwriter, actor and screenwriter. He won the Prêmio da Música Brasileira for Best Singer in the
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 0x77a54610bf866564dcb6687ad94027d3694a70ceb06d896ad2742b110ce2dd98. 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/86ac3e30-698d-41a0-aa1f-5a76854f1b7b.json and https://artists.proofprofile.net/proofs/artist/86ac3e30-698d-41a0-aa1f-5a76854f1b7b.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 0xe35a702371772353b3a8de90f3e3be13b9fbbe4f2e8c227d48ef39dd5ce2c5ef. 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/USHM21738875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a5f62afb398f6b8c08808533b38c353404ca35cd81b6b8a56780951ecd4993. 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/USHM21738878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb691c5419bb4281953fbd7dd03bc89723f24fb7ea46911f5a11a8b48ce50caa5. 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/USHM21738880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb246b1488a291d40d3fb2d6da1f1a0beb782922eacfae6f65c439af5c8be759. 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/USHM21738881.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541a7c14dacd1cc7835dd9427f6e4b514e2f2374043124834f88772aa4d90a1b. 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/USCGH1563536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f87020b4a6dd8fbf4ddca688ea4c77ed981cf74284c041dd7664669318a1103. 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/BXJHH2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588e278f631395b46ef284648a8e5e77ff28f4350be5c3c9367bd01376d6b668. 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/BXJHH2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac61245e850b64f77f1555becde5d23fac2c08c667351f0ca8c5971e4969845. 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/BXJHH2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c645343bba8773c8e813e0c3b4b12f6964b85c9e1b8d307ead4e7eb5e643e4. 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/BX16L2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01364b0d1b99fc3203008a3ecefd47e24abcba7cb29fa7526f439006105664de. 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/US3DF2252152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8204e13c18e6221b6c1a3c0fecd2f88273016b7a5147e888a8ee146de561785. 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/US3DF2252207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7d45f2cc779cf1e002ba76c25b461c89cea61b65b9d36fda5b46691b5deebf. 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/BXJHH2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b003a1604b926f281d6309dfa6a94fb798f631a4a30144494a09e60961a2dc8. 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/US3DF2252380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d252b509cf9e6fc04aa9b3fb94ffad2b605d7722cb8e1712270af70d439f57. 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/BXD8J2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5661900bf3d71bbe36a58daf5641cec42c2da89f608074e50ea53f319bf097d. 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/US3DF2252395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb393773ed0d43228cd1b822fb55d824135104031f544e5ddb34b6316ddb4e293. 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/US3DF2252396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25521a64de8e7eec0ce5abcde0998c1462ec382abfea9bcdad46029cbebe929f. 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/US3DF2252398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf641c6428494ef09535a0c3d8baddc31f845beb358b4d55394729f642b1afc28. 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/US3DF2252401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a571930c911e552c86eb255842b8e2cf0d0e4cdf7cc6d1d2fc7be878623cdd. 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/US3DF2252402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc246d52fa00e664a42d6704532e90b477c67f7d984ea0606ee1efded7df9b34. 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/BX65T2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f2ced9fed1efcaee1c5dfec5dc4156545fdbf99d02d46e0eda6a9ee623454. 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/BRRGE1803297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbf876b9fd9c5b19bef8bd7469029f83c80438f76fa2270f2c144afffea74fb. 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/BC1GL2103335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c645343bba8773c8e813e0c3b4b12f6964b85c9e1b8d307ead4e7eb5e643e4. 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/BX16L2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c645343bba8773c8e813e0c3b4b12f6964b85c9e1b8d307ead4e7eb5e643e4. 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/BX16L2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ca3572930b2ab5d1c52e4ae4bc55b6be19741cdd01299ba905ef0b61709d12. 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/BRI9X2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f9e89e63fed4cce47bdb1d08e88cd495be317a947b5061098246ef7ceba449. 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/BXXIP1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f9e89e63fed4cce47bdb1d08e88cd495be317a947b5061098246ef7ceba449. 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/BXXIP1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167b427e75122b6747e5cd5b255b410d872a6585dc2821d9da942c47f1342dfd. 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/BX05T2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167b427e75122b6747e5cd5b255b410d872a6585dc2821d9da942c47f1342dfd. 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/BX05T2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cc93754c846279ee8c506e2c6fec3990d8307daa06cdbe835ab94933b758e8. 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/BCNMM2400017.