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 0x0731193589d1458cac1f4900a7e63aceb294ad735f585be20f00ca1fead5e071. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d87b97d-3164-407b-a2ca-dac6b3dec518.json and https://artists.proofprofile.net/proofs/artist/2d87b97d-3164-407b-a2ca-dac6b3dec518.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x6d0308d371270295512e148a843a4f7ae1d3852e4f2c13a73efd6fd9ee51d03a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY1800077 — a six-check JSON result.
Tou na Moda (feat. BISPO, Capitão Fausto, El Salvador, GANSO, Modernos, Rapaz Ego, Reis da República & ZARCO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5314b92282bb22ae315fd9e7c417f3989a3e868bd04742415e46d8d44b17a4f3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY2000139 — a six-check JSON result.
Travessia (feat. BISPO, Capitão Fausto, El Salvador, GANSO, Luís Severo, Modernos, Rapaz Ego, Reis da República & ZARCO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d65606be80fe6368c9583d4331389f43be0fdcfe1269be052166741c7211eb0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY2000137 — a six-check JSON result.
Liberdade (feat. BISPO, Capitão Fausto, El Salvador, GANSO, Modernos, Rapaz Ego, Reis da República & ZARCO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bf125551a44860095cc35a047635130bff2d1af9645768915215189f122e3a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY2000135 — a six-check JSON result.
Sem Razão (feat. BISPO, Capitão Fausto, El Salvador, GANSO, Luís Severo, Modernos, Rapaz Ego, Reis da República & ZARCO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696973947e7b5656c10d242998ae362d05346bf8bf321908840409e1364cb96d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY2000131 — a six-check JSON result.
Os Amigos (feat. BISPO, Capitão Fausto, El Salvador, GANSO, Modernos, Rapaz Ego, Reis da República & ZARCO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5f160a3269138fc7fda040158bace0e06eea6f6b157a432b08f18a25b118d3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY2000140 — a six-check JSON result.
Proporções Bíblicas (Absolutamente à Porta) (feat. BISPO, Capitão Fausto, El Salvador, GANSO, Modernos, Rapaz Ego, Reis da República & ZARCO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531819a5c854a4d59b9e0c5d94162163c4f89b616884fd6ff65a3cdc767fda32. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY2000130 — a six-check JSON result.
Má Vontade (feat. BISPO, Capitão Fausto, El Salvador, GANSO, Modernos, Rapaz Ego, Reis da República & ZARCO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7131bf9b2834477b6d797860a7a81e115954235f4176804cb9444cfc3006a6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY2000134 — a six-check JSON result.
Escudo (feat. BISPO, Capitão Fausto, El Salvador, GANSO, Modernos, Rapaz Ego, Reis da República & ZARCO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152b427243fd04b15bdb8cae842b35850cc9ac547b9f039e1fa25a44523338b7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY2000132 — a six-check JSON result.
Casa Andante (feat. BISPO, Capitão Fausto, El Salvador, GANSO, Modernos, Rapaz Ego, Reis da República & ZARCO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048f94e6432045792d5e0a7d9c72806aa57d28984ee8115ca5707cb58125cb81. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY2000138 — a six-check JSON result.
Se Algum Día (feat. BISPO, Capitão Fausto, El Salvador, GANSO, Modernos, Rapaz Ego, Reis da República & ZARCO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca36c9c90ff21d34104e6c422193bdd01296788b09e3ce49a33854d4f1515ae. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY2000133 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5314b92282bb22ae315fd9e7c417f3989a3e868bd04742415e46d8d44b17a4f3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT9EY2000139 — a six-check JSON result.