Facção Central was a Brazilian hip-hop group formed in 1989 in São Paulo. Known for its aggressive style and lyrics addressing themes such as police and social violence, drug trafficking, and criticis
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 0x317743261f7f0e595d520d0f96e3d602d9442ac63ae619b4d15c80ef3053f04e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efa2147b-0856-46a8-9d40-68ca1ba0b5a4.json and https://artists.proofprofile.net/proofs/artist/efa2147b-0856-46a8-9d40-68ca1ba0b5a4.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 0x6a6be6eb14b29472a36f7efe6d0f770fee677a62b62bb82197e267710df0c0d1. 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/BXGPM2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0382d407015cc656cb7b7d0cd92dc23bf4f5d98b34efb0344c6f31d0dcc84fb1. 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/BXNT62207996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3d719cc4a6d9af85a9b74e647ef811dda80674c308e617bb74507089c7b96c. 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/QZ5AB2397960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe8ecf4c00dd70da81731881e5191f4b522d06d928c2e804c61d5769fd2ed14. 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/QZ5AB2397957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe44f039bb9c5fbbce2811af9f8fae9572fd78ccf28eea8645aba7e5e0e90b0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5AB2290362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7b8dcb8a8373cf73702d36379f4b89785ae15d5c4385ad0cafb1c13016e276. 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/BXPVP2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa22aec5ce80ba14f6790a7bf6d56bcd29aee179d2b843f48f5428b3c153ff1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRU0N1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb43f6ea2b6fc5da3ffb7bb3aa2263222050c79d6132a9163c4d9008cb17c5fa. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/BRUON1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12610fa041886cd6200763039efda73bb2ac3d0dc4f21cd5ecc7e76ee408f375. 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/BRUON1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43c2b9c62c74a21afb2888c022f73896686db03b946e4135e2566393a35c684. 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/BRUON1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe496df7a0d2c3214c53df4674b524082f4b64fd2609c583cf71ae72ec12b6ac6. 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/BRUON1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb174822c3d31e1ccacf737e675dcb060126b196607009c649930e103896a5b0a. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/BRUON1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b335e5a45e9ff4df9b5ba24fdeaae47b57afd5f83e2408c952435efad2ccf11. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRCQE2200040.
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 0xf7e82ab5a1df11c9a678f0b6656713d5b069ac7200a65945a03c2e071e5d69d8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRUON1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9fd6fb5192593293a6fbde7bf0b572d2cbf9c8af0c9b1129b5d94abf9b98ba. 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/BRUON1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643fd92fd60d28b0548b634c310ef3d45416db14e10ec739a8413eab0bb7e8f3. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/BRUON1900008.