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 0xfd1053100f7ec2571eb4d97621a921c0dafe1c6af55bc1573d6021040c84a5b1. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8aceee3-1c26-4a2d-9d17-3109b80b4bce.json and https://artists.proofprofile.net/proofs/artist/b8aceee3-1c26-4a2d-9d17-3109b80b4bce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
As 7 Maravillhas Nº 3 / O Guarany / Última Inspiração / Lábios Que Beijei / Cabelos Brancos / Caminhemos / Feitiço da Viala / Tahi (Pra Você Gostar de Mim)
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 0x36327c3f5961ead962b742a507a3b80890e651433a70aa359be73568b3c257bf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM6MZ1421969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6071800e2bdd2a6a3f7efc0124cf03f297df3ac5184df1be16baf09f246c3a31. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QM6MZ1421970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe46c711135468abaf6a90e06a162d14f75fc33f56d6cbbe8748b23f229f445. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6MZ1421971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957b2ad00e0be8958dfcba01920d2d3c7d326a8e3d68f9705de2cc46d19a1657. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QM6MZ1421972.
Recordando Boleros / Besame Mucho / Que Murmuren / Vereda Tropical / Sabor a Mi / Cuando Tu Me Quieras
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7917fa8163d321d27152d906e085e5735698dcd45f0488f3b58f74c99bbb08. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QM6MZ1421976.
Ciranda Iê Iê Iê / Caranguejo Peixe É / Nesta Rua Tem um Bosque / A Carrocinha / Passaraio / Onde Está a Margarida? / Samba Lelê
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc71bac31b04f6d88b8bc18a923272a44fdf804b03597df7d2b89b92bb2e5de. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM6MZ1421978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9fc3f1b593dbecff7578deed4d7a58c98cda3e345e8edbb76194c537ce55b8. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM6MZ1421979.
Canção de Liberdade para As Borboletas - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac0e30514a13d44cdc76067a84b3a28b235f1957d796e0458a18849066a02a2. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QM6MZ1426328.
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