alt=|thumb|the traditional Cunha coat of arms from the Livro do Armeiro-Mor. Cunha is a Galician and Portuguese surname of toponymic origin, documented since the 13th century.Genea - Origin of the Cun
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 0x08eaebf79a717b31df157bd85c849e56381a13657418a3ebe381fb3ed04fe499. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f90d6499-f947-4124-bfb1-da8d822ffa90.json and https://artists.proofprofile.net/proofs/artist/f90d6499-f947-4124-bfb1-da8d822ffa90.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 0x1c3e160b328b1d2590e5b030ee2518b7e0969d74c69a933a2d281a8a68f965c0. 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/QZES52402875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ff4df1fc265bec275a10921b655077483386bfa8d540ccc97fdf4970f6ee63. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:17:29Z), 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/QZES52402876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38c895ff110840c6281e1a3d12ddcd130d92d91c0eb79101ac57876dcab2ff4. 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/QZES52402877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10f60375e175586b44f82d97e0df5af922cc4e6fdea4e47244a96a7a36f7e49. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES52402878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ca3290a206ed1694126f55b26a99dd7cd67a9dc01525d755bb25c3e819dffe. 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/QZES52402879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9b23d96e92dd9fbf1768063d362f91984412127e34ecf30c84b99b4820bb7a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES52402883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62394d63165ce2241570da716dd21e7ea9780c540ba95898705cf5fb6e029999. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES52402886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc6bd3d9b67a4bcac31881bbfd750398f79ca5eb0c21399259473e79e58e831. 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/QZES52402887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d011954915fc15f1086021ac0d0c2960f0d3bdd485949cf1fbc47e0d604e86. 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/QZES52402891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68fe260e7624d033ca7b8ab56ef3040403fb2fc48216f690a21fe021e06f9de. 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/QZES52402896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5b716b11652d6f4e369edc33fef1c3a41daf4a7d4817958a0f12123f84fb3f. 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/QZES52402897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8f8e6f2037a75fb7ff7fb026b1cce452b89e696c80d07d4af99e3f0a5dec03. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZES52402889.
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 0x77bad009d5844ff3059479dc297084802acbfd374afa628bd08913d7ff7275ee. 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/BX7O92400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adfaa85da13a71913e7f16cb485073f80152de8082e98ad91eaa15b18965d51. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCI6C2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8014c99377d025c2326996dd09c3525519ece22605fbd6c1799798988c20dda9. 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/BKB4T2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d06e760d1f8f19e2664d2399327b6f84d22ff44b3ae0d8449a0e47f8320bd9. 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/BKB4T2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a58dbe08ec7c9f1a788ef20e5ef3a4275da7a67b973f494b5d41c5a145e27f4. 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/BKB4T2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792e048fdfb0cedd1e6e62bde911cef9c37caf1e222bf75394c6d1af6aa9612c. 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/BKB4T2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5f03a49d80381501fe639cbf68c7c43af9aeac260fccb16113d9f9defefa85. 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/BKB4T2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b9662057edbe1f2d098d5b65584748a7aa0022e862fb0076b62869aebd42f3. 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/BCI6C2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38953cbc68e40c2981bf66d6345fd9033eebf7a6f9689b2bbe4c66052203edb7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKEHX2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5064838be167107df9924f1c1a8fcb91caf9f554acf8fcd4cc873286e236355. 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/BKEHX2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958221b6b5aadccb2aa8a2050d7713ad332e8c5f4fbb89a5963e4bb413bc6793. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BKEHX2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c142f07471e88a2807ea4e7d5ec9650c4c933e67dcf5c6ea2e67540399708e9. 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/BKEHX2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01045c00280f05e871d89f4be043ae4f7cc0293a13ed8d0cda888b0534c93762. 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/BCGYR2400046.
Vem se Acabar Firme Aqui Na USP da Leste
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110be882aea85deff8c43b4541b63a9099eaef578a9282271c27423fc3d3fb3a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:11:08Z), 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/BCGYR2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a133316d53b3eeb6ccd95934778205a4065ba11f4dbe44d286e5cf476dacbda. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BCGYR2400041.