Cátia Mazari Oliveira (29 October, 1983), better known by her artistic name A Garota Não (Portuguese for The No Girl), is a Portuguese singer-songwriter. She won the award for Best Singer at the 2023
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 0x8e2d4e7d62d176eed98a7b693debcbee12cfb502c0d64d0f3ab18fd2723ab9e4. 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/4f66942c-e3fe-47d7-ad47-479868caa97e.json and https://artists.proofprofile.net/proofs/artist/4f66942c-e3fe-47d7-ad47-479868caa97e.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 0xa8482707391491dea13dfb434783d71e9dfd647dc500b78bff933ef25943682c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PT8HP1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d6c710f9b0ca6db2e83c605187a31e02ef22982ba8fa21e63bebffa196c724. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:02Z), 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/PT8HP1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad70541d3ac54321ec348f7cca82efc441f510a257caa754dddc917501eaabd3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PT8HP1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8482707391491dea13dfb434783d71e9dfd647dc500b78bff933ef25943682c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PT8HP1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d6c710f9b0ca6db2e83c605187a31e02ef22982ba8fa21e63bebffa196c724. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:06:39Z), 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/PT8HP1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad70541d3ac54321ec348f7cca82efc441f510a257caa754dddc917501eaabd3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PT8HP1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5454099c1518fa1d8d339a9569e26b0150ff735cdc8b713a2e97c13e13d92aea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PT8HP1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5454099c1518fa1d8d339a9569e26b0150ff735cdc8b713a2e97c13e13d92aea. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT8HP1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf639e15902a1aeae9b6fb457c96cc327012deb623195e6a59c2face5d3608461. 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/PT8HP2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf639e15902a1aeae9b6fb457c96cc327012deb623195e6a59c2face5d3608461. 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/PT8HP2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb71d6363071cf143b327c39a088cf66574de1844c5007ca6d6077f621d62fc7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PT8HP2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834bf3bfe816046fb9ade79758df4d4426e07044f1226d39495b439ec96f6efd. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:22:55Z), 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/PT8HP2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b04ded34b16e192071f0a5c091678aaea3a10ab076f5ef5d4398e84170c961. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PT8HP2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9249cad2662d7d1d36e3ce6c5963c021dba37aee068a4756d687e227403592c9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PT8HP2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a981d3060a0cf92da64cd47a2419d883bf7dcbdc9ea08eaa8ffa6329534520. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PT8HP2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64cdc0a5523f36fc22cdc20acd921e92dc15c65188101310ca9ea65c1093752. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT8HP2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00507b53ae773128a7f2ca6bb729a7ba91bd9dfb672d3459f165ac709caa3c54. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/PT8HP2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a2faa1e8822037ea5c1491dd7bdec26e68f10d7b4e6c8ee718117760900d1f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PT8HP2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287aa421a4f660b34bcd8872abf82793a2da7af833f99a175f36b92af9c89bfd. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/PT8HP2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e18489090df627ee280337ba711d67419a1c6eee21433710d04cf6215b99d2. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PT8HP2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8af4789cf7fa1cc225ab1cdc2ff1c22a95098ba07fb4f13aa870c59ac77678. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/PT8HP2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4033339f94fe1c0622b7c7c97383df2846a5d75b7c999484e38d1cbe6357ef1f. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/PT8HP2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511191f8f6fed55e9a37bb8eeb8b4cb29617676afc55f71ccf22085f4af3af66. 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/PT8HP2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1efb3c35f39ac5d61a916312a2efc890c56c280cf085a4b8de2edbc606f2dea. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PT8HP2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74e9e961340ab3b95a87a05cc86bbea1f93ad5d57d4cb836832661cc7341f93. 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/PT8HP2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd890c1122be456a915d3ae23cb3969f75556107bd48bf7ca2cc8609f53a0e737. 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/PT6JR2200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71067366ad4f0c9ee665463c7f8e47176c42c49bae1a0315e3bcd1fef507dabf. 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/USCGH2376468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa791f52755397a3258bf622a4b87bd25bb72c4f7af4b64df7b2c4c0341151d61. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PT3IB2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d7dc9737c22e28ba2871a788ac1e0cc453c3602b5d29ebac7a1758396d727a. 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/QZDA42202478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18a3defdb7bd2ead8ae08e169496ff3d52f49defa2f7b1e4d49cf469fcef99a. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/PT2DY2400334.
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