Catarina Maria de França Carneiro, known as Cátia de França (born 13 February 1947) is a Brazilian singer-songwriter and writer. Her music draws inspiration from literature, referencing the works of G
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 0x399a98f2323fc5f8b7a9096b570217ccfc6fb81a7be845232969fe08fe411b87. 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/a51e8e2e-1669-49e7-a9c5-dc08955e3991.json and https://artists.proofprofile.net/proofs/artist/a51e8e2e-1669-49e7-a9c5-dc08955e3991.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 0xd27153a9beb424c32b08d1794e46d2f76751d59b417f6084a6a118a876295483. 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/BRSME1701102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7932023a1333fca8b89adecaad5465b1c2209d49ad43bf65d9cdb604c83dcb0f. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/BRSME1701103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66be55e46c6d356b043a9895aa8a65f8936ff9d00301c3c428adc73fbe602e61. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BRSME1701108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5755aa5ef59448f278f33e01c083eeff4fe193ea60a0fb7012936bbc7a98728. 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/BRSME1701109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc277f55d8c351cfbf26fefa7fd49ac4a09905aa584608e5a8a4f80738eaa2339. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRSME1701110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaccd153af658211fcca501faf4484798aee4b4b3d37a4a0a38cc611a009b14. 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/BRSME1701111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbce0b53d8b0496695080697ebe856fc20e038c21ef5345f301d88730c6d1c39. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRSME1701112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71f394a0cb4c9281baaeab2db2896bd4adf541854446809b2d0841c52a4660c. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/BRSME1701113.
Meu Boi Surubim (feat. Clementina De Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f746d3b8697575dfd16868b96bcca706fdeaca6b0e4f803ef2560377caa2dcb. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BRSME1701114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdb0f0a9e3bf73da90d9ecd206a7a9b26feab16c1a806c5e78f828ba46f5812. 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/BRSME1701115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2b22f999ac7e867ceda1f525373bd471d6c5bf58e8404f75c5c03887c7a412. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/BRSME1701116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695eea31dc29c96ca7dc6ad7cefcf30057039bf2aa53665399d039cc39338153. 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/BRSME1701117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a74f40da939c8b513b5195ac766f4890069737c8405bc15db5c9ca8a8515fd. 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/BRSME1701118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512e69bd97182c1af400d6a12b52b784a04860acd18f6b47e401b0faa9e5d7b1. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/BRSME1701119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6472739bf95a4b69ec26d0cb87ebe518a4a92f7e4c6fe3dfb11ffaeb7bea5c2e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BRSME1701120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e89fb24d543eb7ccb50a89222f0b34d702dbbeab001aa3f81605d5b51cc1835. 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/BXPNG1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf513224b8d8adf7f766586a36decc636cd42f551df83074957a67419a8d2aa. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BXPNG1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6908521cd032d2b47dcd24818c20dc115ba565ee148ef6a29a93ca26a44d0bd. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/BXPNG1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6c96f7536ce99d7276f73fbcef94429b11b66f69549067fda34711a9df27be. 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/BXPNG1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165e8a434076dfb439cc45b45fd49f76299c7ba00165cb6ed67f2797093f3c95. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BXCTD2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a804e24faaab1eaf01c9c00362553f82b4c5b64f425f6ea80355f5e82e89cc. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/BXCTD2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71eca4967d0042f8a1cc50d816cc6cb391b25794079cb1b2c45b2aa24a54a229. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BXCTD2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa77531c8ccc930ad23d4cc7818055994eec384bf97f79bf02544b0f56908dd3. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/BXCTD2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519a36f98ad5d10391bfb6c0da5149ba237ed2275427b5e22400a04124e5a677. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BXCTD2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a8307fb7cb6f19c38405a6041481c17775ed717f0d7dcd7c36f347d51b73d2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BXCTD2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdce5b8eb91a945cffe53a9aace78248a18dede8bb140ffb269baadf10ba07d. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/BXCTD2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b006f5468eca3936a6b39a6f908c1b334297164e62beab92caac715f552bb3. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/BXCTD2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c1b2610b0b9a35d35f62863c84e68fdbe5578ee914da723cb6833bd597c1cc. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/BXCTD2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7659485aa2ddf189719db0a66750dce0cb613f98e4128b3aeb102b0ee015d482. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BXCTD2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e72bf735fb0a498c4d41bec46f57754def0be29eea4be3d764e4818055d6b2e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRECI1200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cdf1ad317ae7e5192d4a88f35cacd4d855dba037b49b8b0d0c99feee71632d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BRT1K2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cdf1ad317ae7e5192d4a88f35cacd4d855dba037b49b8b0d0c99feee71632d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRT1K2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687f376d46adf4e9acf828a6fadd762bccf3d3e81782c405cc1856c61456c466. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCLPB2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687f376d46adf4e9acf828a6fadd762bccf3d3e81782c405cc1856c61456c466. 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/BCLPB2100037.