Cláudia Rafaela Teixeira Pascoal (; born 12 October 1994) is a Portuguese singer and songwriter from São Pedro da Cova, Gondomar. She represented Portugal at the Eurovision Song Contest 2018 with the
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 0x50449458ea548738a8ecfaafa7b0e1f5809bcfba88658c7133fa370eb5b26a79. 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/0eb27be7-d815-46ce-9176-314b610ecd26.json and https://artists.proofprofile.net/proofs/artist/0eb27be7-d815-46ce-9176-314b610ecd26.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 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 0xb4c3f2dca9701c9a2ac7a42b3d256c54611a0c54c42c62357acf8bced4537802. 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/PTUM72000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8fec856e043cc1754f115ea17d8f1d3790bbf9ba48f8183b0d861314027923. 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/PTUM72000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb86a4e43b457ee33f1e17ac100f6591fcfd7d318c373930de99e6188ca3a82. 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/PTUM72000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8d343d54cbbffc72ed25be8aefdca059a78fd4f30c07d583d42b97ebce3952. 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/PTUM71800281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b66a5b5846232ba77815e1bf67fb6740afd4836795480f6f600c6216776ee2. 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/PTUM71900318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc982a351f15a4a99c0f0f95cc03e8b38cd9912ff7d4b3a04115c021cccbce566. 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/PTUM72000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40be0727450337ff9252848a93e4c41a5a86555eea8ba07a02ca10adaa30dd20. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:04:29Z), 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/PTUM72000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e19555dcec71b7075513a29c4241c4e578a7622875f4113785b0a261300059. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PTUM72200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396a6f6d32975cd339743bb2fe3ebaa2cc3e53c8d40344d3aebd25bb5afe63e5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PTUM72300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e67426f7883b66238cb8afed2b705dd06b53c51e1514baae7da075a4ffe5830. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PTUM72100730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace24da7422e0a2cbee7bb0c764450f348a5d2b2abab6761409c4676ef91ca89. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/PTUM72300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51aeaee9041f1e79f9f825552d28d835ed3a70910f68c847beebf2189efa8c1. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:10:10Z), 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/PTUM72300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b484e290bfbd3c3e9eab80629c4a906717d06510e74138b8292ac90e5c6c8b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PTUM72400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e8d594cf8b149ca4e3d7754c96fbe20be61fc20a375e561d391bc8939d6fb4. 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/PTUM71800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a4012b2282d2e52919c7b3e3d27271f884f4ade9811c1392c687a7a5be1e32. 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/PTNO12400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6398b762c973155144e359d282ceb4bec7e4450fe1ad8f53e19a5ea89c3146d8. 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/PTUM72300012.