Augusto Sérgio "Guto" Ferreira (born 7 September 1965) is a Brazilian professional football coach, currently the head coach of Vila Nova. Career Born in Piracicaba, São Paulo, Ferreira began his care
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 0x5593d96fa0693a943cbbd276858f01da182396997b387d60ca0d80a1e3aec29f. 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/57178142-e5b6-4faf-89fc-24d6a781f875.json and https://artists.proofprofile.net/proofs/artist/57178142-e5b6-4faf-89fc-24d6a781f875.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 0xc9011e33f9268ae6c9051e8624868d3af7ee52e890e1f691bddc4f8c231ca473. 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/BCVFM2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778938172b313bcd67a72fbb328f74849e21cd206b252f9ffc1cc9af58def438. 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/BCVFM2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d58bbe9300a731d533c0776c7b046789fd0a9ba33d64cf8b5456409845ac38f. 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/BCVFM2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad90de673952bbfb7f8bfb9847b1cfc02c6315dec9940bdd28c98f2e6b9ad05. 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/BCVFM2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a0e48d71383e33eab50734aac2e72956c44aff3a7c435e0384a33f6ce315bf. 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/BRTW82300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ed19af4779d5d7ad87a078de4f075f4977bd2462c1c200fe48941ae9aeb673. 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/BRTW82300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d438fd7613c94166ab47c8a1b9446551506ce52ba5c9ce490f506e61102123. 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/BRTW82300034.
Cheiro de Shampoo / Frio da Madrugada (Ensaio Aberto Sertanejo #03)
Cheiro de Shampoo / Frio da Madrugada - Ensaio Aberto Sertanejo #03
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b64c9a8be5b96547fee5871becba9552435ff9d39c32d27ff020f91c22ce403. 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/BXNT62500794.
Agenda Rabiscada / Cara de Pau (No Meio do Rolo, Ao Vivo)
Agenda Rabiscada / Cara de Pau - No Meio do Rolo, Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb23d017235ddbf061844ab396fa9271660371910d3a09c038a47fc51de524f. 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/BXNT62500948.
Temporal De Amor / Não Olha Assim Não (Ensaio Aberto Sertanejo #03)
Temporal De Amor / Não Olha Assim Não - Ensaio Aberto Sertanejo #03
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70079fc5849521ff54d18dda1a2719aba7a35bfbb0cfda3f6c936c2ff8d39e43. 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/BXNT62500788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd245c85ee27ccc5ef5ab8ba9fb9b406c4352b104a5fe4c5f796d506e96f3420. 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/BXNT62500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c4f8b512d04217469383d89ed621d923e0ebab75350d32fa2b0b80648de324. 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/BXNT62500214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9bcde924e56f2ae9aa6c0aa328ffb69a12e7d0694a4f753fdbf3b06acc994e. 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/GXBAV2537092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1c58995280ebf75c5aae633b3bf6f21c65aef901cef447c38cd4c0293a9b72. 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/BXNT62500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cfce9a460ed29554c3d27413fd2eacab2a9505ade4da40bfea67f6cece795b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SGW502222573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c363ca9c2f28ce3bd59d30eac518504411beb0c519b1fcdfbdd227f46378d4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GXD7G2280622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fd449ec757c7507483cc3e169ba0bdec717c4d1631a79ea46a0e92f6686518. 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/AEA3A2314539.
Sem esse coração / Juras de amor (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2f77dc5febfc51900e50ace61fe2b8bc60828af6a99ebedb53ed83e7482c8f. 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/BRTW82300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a0e48d71383e33eab50734aac2e72956c44aff3a7c435e0384a33f6ce315bf. 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/BRTW82300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ed19af4779d5d7ad87a078de4f075f4977bd2462c1c200fe48941ae9aeb673. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRTW82300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317a06290333aa1b9682959518c2a38b9018ab5497d465cd5c600230123d59cc. 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/BCVFM2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1eec28d8300a67d544faeee77ba641f3c3c078ec147fa3e38e84aebd9e01147. 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/BCVFM2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8357fa9bebf3b1fbcfb63fcc3bd90356a7932b422617ab32f8bc964d30a9fb3. 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/BCVFM2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7682edd940ed76da3a496fdd400087962a770048fa4487aace9cba9f525e72f6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCVFM2100033.