Heloísa Maria Buarque de Hollanda (30 November 1937 – 27 December 2018), known professionally as Miúcha, was a Brazilian singer and composer. She belonged to a musical family. Her siblings included
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 0x22696b8237c593bbeee92c2cf6816f065bb40c9a71d02beaf25d962aa66e6bcd. 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/d9f8af4d-b650-4bab-989a-707f0d738f5d.json and https://artists.proofprofile.net/proofs/artist/d9f8af4d-b650-4bab-989a-707f0d738f5d.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 0x709af1d7371f1ce5750a09f37bc25b179934f51f6d7b3c3e702136ab29ef4fb1. 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/BRBMG7700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3242928c84d5092d506a0b9a4b65d82f6b44d60bc4d17b117d344467049c6a67. 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/BRBMG7700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddd1292ab4e8cfdc74a392edd4e67ba4932139b6337183a0550788806ef5518. 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/BRBMG7900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05852b61314354f66b6a16d20e7df7719d306aca60da93b00409042b43c82e7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/BRBMG7900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f85e594a84e3d85288228aefe81c29d6800a234deaf17785350c9b191ae2f4. 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/BRBMG7900040.
Saudosismo (Participação especial de Bebel Gilberto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5485a1d5cd9e538c6e2f5da6d8f5cbc589b2bc3e2707e095e10a4471bd75fa3. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/BRWMB9705570.
Focus - O Essencial de Miucha E Tom Jobim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ee8145b65e6163e48db47d714d53b62fd7e3fb110a8aca7cec1978e2afcd71. 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/BRBMG7900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695a2133518b6163cd6f38110920887413bf10e046fc8f7323cec346151415d7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BRPUI0700122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11beec26bd2802879d7dec123ca2853ab41012e04559088cab0175837679def7. 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/BRPUI0300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2c2ab7cdbd90913c70b94a68af9a68dc9154fdc6d94b406b3540e360c6b95a. 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/BRPUI1500133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668c09b8f3db7d1670ca6904ccf00a0a4034996a48bd0f28cd213e92a544ab64. 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/BRPUI1500134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588c61208e21148f2b9cb89148292d3d212bfb6528aad7a8c83ada545466d2c6. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRPUI1500135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707cae85cd821eb498139afceab3077136185516a94cf1b7be1688f989762592. 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/BRPUI1500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1305a94d622e2f5f39567c31adfae5ad719aa6d0e5463b5e19f61cefb2b8d58. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRPUI1500137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c87de94972d8a7271dd66c3ac82266152008ffaf9a044944a152b432b60a65d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRPUI1500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa72420a72d8516ac256c8b11d63ca385e631504d1e51d2905be93beacdc02f. 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/BRPUI1500139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf1c845dfd3ad2846e09ab8a0158645af3464a8c42ab9e07ef9618017203ef4. 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/BRPUI1500140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b7f57e59496a1c145604763f2a743048b9faced7926347e826f25217a3a9de. 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/BRPUI1500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc66e17df3f7e98c2033e7aa53be925f1afcf34be9f5a30fd47475c8dcedf2b2. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BRPUI1500142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9557b20ffb29b811e0af13671bde4f3a118ab35e4085a3980c225cd77de933a. 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/BRPUI1500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9115f319df00018c8c6926c6a37151ae49721ae230ed36cbded9dea824a65065. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BRPUI1500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eef8e415818915b5af45e206dd6a9e45790d0bf3fc294c08eef9ddddc326db. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRPUI1500146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f26823403eb158354ddf74a696ae3d321faee9a6e1012ad59002c8d2e6f148. 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/BRPUI1500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4faf76bb4070788728189dd0109fa82304272ce3b659a153c8fdd292bc35ca. 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/BRPUI1500148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc7928efbd1c389c286aa5df9693126887d68cbdfd1dd4edbe5bef8ac038c85. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/FXR752503408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc671e4420f170b3919f5a5e410a0e204c4891225b1dd64d678e92eeaaf53d0dc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FXR752503409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37ed0f9704a9836e11ba99e38d34482e771da841ac7c19ec172ed6f125dbfb4. 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/BRBMG7700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2f0693f79b8191276b5d82e99df73c5e2aefab82905ec84f13c0c2b86537cb. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/BRSME1300927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ee8145b65e6163e48db47d714d53b62fd7e3fb110a8aca7cec1978e2afcd71. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BRBMG7900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1033b50efd82819bf8c56aafbf8f16df21e79ab0a028e1c811bbdb59a56368e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ARF411200435.
50 Anos de Música (Special Edition) [Ao Vivo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4793a5269bbdc645afe3fe7c04efdb91cc5722d095dc3b50819092dc78e9416d. 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/BRPUI0500328.
Marcha da Quarta-Feira de Cinzas - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5857593894a6c55ad48262610125b73c3a4b5395312252deb9cddac1c928a0. 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/BRPUI2200236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ea878b5e36ec1ddbd46221e5c88cda9bd97a12d9b74e1a79eca19ec5665f53. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRWMB9705571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c9ead062ad5891a83e626be7a7b043c62c3d76c229277b0f51f4facd370300. 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/BRCID9600184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52cb52a30f7def46b1ec7a50020bafc391dc5326bec711fc25d27468164ab96. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BRRGE0800043.