Felguk is the stage name of the Brazilian DJs and record producer duo Felipe Lozinsky (born February 12, 1986) and Gustavo Rozenthal (born February 26, 1982). Career The duo performed - and had th
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 0xd12efaddf6961223d263ae10a432ab5042450c672ebdc5a9f20ea963592ec25d. 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/8eb70043-28f2-4453-87d6-560ded9bbed6.json and https://artists.proofprofile.net/proofs/artist/8eb70043-28f2-4453-87d6-560ded9bbed6.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 0xf53d27b28338096e0c844c607a00956fe4752c10ed60faf106bfeb94e63470d2. 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/TCAEG1957353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663ce0e7b6af2198a9022ae6aa65e0d3c87b8ede3d94713593850dd2ec9cc2b4. 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/NLZ542300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2f18b587a7a47298b5386792e8765c0a2de6f4fee1745e2f95ced447994332. 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/GBLV62204167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc950b4ed690916e60f4d195ca16b844a96d49b5413e723d4d08e5c018da9b6f. 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/NLZ542200919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e491fe74bcb4b9f4b03223f9ba3dc5fbbd90171f824fe0bb49d713ecfeba52. 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/BCGFK2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716fcd73ea3d86bb5fee1f188bf89a794e2943159b1b8a3a99fc99b8f515e4ec. 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/GBLPF6684998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce60c6d6e784f82109ecea1b69859071fea34f7baa7e300d7f27f7cbdcb58eb5. 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/TCAFJ2158967.
Devotion 2020 (feat. Fafaq) [Will Sparks Remix]
Devotion 2020 (feat. Fafaq) - Will Sparks Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd822f8c7e950c202926db61ad8b41ad51890d3f2a57962c60f1f184cc56e6198. 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/CYA112000741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d4829af5dc6d58e31c0ade449c7c6d109d6a76654e2db24b8daf5b1cbe7499. 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/CYA112000673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c63140ad25ef8e993df4a36d3b9a3587918cafa391b1f0960136c8965e7193c. 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/BRFHK2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee28c2c10e9a1606f34e7248a2d2cde44477fb1fa52e52179ef671fae0405e36. 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/TCAEY2055504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c705bd7087b5a88399dd69edb2ca12a65b2d8fb9a83b73706732adb68e5503. 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/BXHBP1900438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85b855a058325a7a6c2b070af9cefedaf80623844a10fe0ea1b88d214186ef5. 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/NLZ541901469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda405f0b057ac969e3f973290031c6f84ce696c169f33e27db536c3e5906686d. 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/BXHBP1900243.
The Funky Drama (Scarlatelli, Lemon Pepper Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f60fe63f9d6df4267cef8005e615f3018dd1ea8c314426756f825d0785557d. 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/TCAEC1953719.
Eu Vou Pra Bahia (Felguk, Watzgood Remix)
Eu Vou Pra Bahia - Felguk, Watzgood Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663f18d710fc55493c5e8c8c3163a51b7a4fb9978a19befd43efa805d90217c7. 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/BKCOO2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fcf2fed7effc8c512e5733a6a278385d4ac5548c32e2bc6cc8ef3ae2b5d8b4. 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/BXBK62400042.
When We Lose It (feat. Fagin) [Extended Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb911b33c311d4c79b44ca85640e471f16064b1f8dd0acb19c86188c0d2558a1. 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/BXHBP1900471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df1f4e1844f93318ff440ef2574d8f1334fa0f510b41795843ebbf2eeece8d4. 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/BXHBP1800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75355c781d0db3cc69e24ec74a38b8ff5aa751be056168037f883a243c826dd0. 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/NLZ541700852.