Iara Espíndola Rennó (born 4 March 1977) is a Brazilian singer-songwriter and record producer. Early life Born in São Paulo, Rennó is the daughter of journalist and lyricist Carlos Rennó and singer-
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 0x15534852b6231155960f5ba33028ee60b618b5960d3dd09104d186036a3c3645. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4bc40cf-cf14-4592-9e43-18ef786dfa32.json and https://artists.proofprofile.net/proofs/artist/e4bc40cf-cf14-4592-9e43-18ef786dfa32.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 0x8d8e59cc4b7f610fd09b5cad6dbdbdc633f88cd52ced26353c26cf4d509a4a87. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BRI7L2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0b74c23cc70d50150b79c9a9b4312db3c32c2ba677bea36ec33897aad697d9. 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/BRI7L2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cfc88e54a4803698ccca3819e2c5d4219e21c1fd7ef0ee42bbe8d3bb09d6a3. 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/BRI7L2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c855e6410594dc0c3b103236019f0fe6a7f04fe1656ae80dfff87c12ca3341. 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/BRI7L2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c431a5973c69cff13327663da0c6dffbf6ced322f41ecac3a045991e3d26309. 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/BRI7L2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55e4995c851e7ab9ee552546a5bfac29600ae3ebac2caaa9af2b53bf5267077. 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/BRI7L2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda31607c81c385d8e5b36ca432c4cd67c1ca7b12e2e003ef6c0650b0d2f3f9e9. 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/BRI7L2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbf8003758d4cf33b2c46fc50a7fd370883801eb96dd3a07c2c1a255de7235d. 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/BRI7L2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fddc5e2d342893f6b282cf86ad7a3bc65b7c985dfecc4e20e48aae0079e3728. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:28:59Z), 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/BRI7L2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08022b80e496de8cd7f042e583d1b60c237dc7ec97621de4f5cf9afb020c17f9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BRI7L2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f0b23df159906bb4872b4eeea36d9de80594c387b48a3d0fd4d4df748c262a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:44:00Z), 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/BRI7L2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b6adbd37762f7f5a2f623b3bea0bb36c9fc4ed88d497ebb4753f0de892ea32. 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/BRI7L2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d6671f4315008b096c7c8db18ffb6e97f953c9b71570dc7ba84902f540131f. 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/BRI7L2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7759b0c34e8161a3728de52d007bfa4430ca13a5216a3c3b83f791d3cb8262ca. 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/BRI7L1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b74378fe7f2fd7d00633d7bcf4e751d0fcc62f92511b1fd8b270f26fa762d9. 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/BRI7L1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33060236057e697da33dd0bf26e74adf4e9eece724d9c6b350af8fd5adc3c732. 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/BRI7L1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7804a6184306104a08be0560882719a66714aa84fb58461981d32064c8493f71. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRI7L1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5249e97bc501a99d1429df8f4654b04e7394f8fe5015d74ed4228b34cd84c5e1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRI7L1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4f7fdd322ad74d40f0144ddb465db25faf529628fa169289952f6dc2077763. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRI7L1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31b4e8bb540f4e33d21b1260b1ed7f5d3aafcc8717aa60822d04b171ea2b3ee. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRI7L1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8562cdca2925c732947ff33317bd1d942165ae1b7bcf719bab055f1c052057. 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/BRI7L1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ea50558a1bccecfed110f4492731cba8b943c46cff9c31929b3a7cc51ede33. 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/BRI7L0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d77277774f426f57b4f587ba098e00fc4f2908d89db62b76c78ff09916807fd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRI7L0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1501e582e6282f76c02f0075d24a4eee3b5e5ad84057078df4cf6ba21d3f2b4. 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/BRI7L0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c431a5973c69cff13327663da0c6dffbf6ced322f41ecac3a045991e3d26309. 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/BRI7L2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbf8003758d4cf33b2c46fc50a7fd370883801eb96dd3a07c2c1a255de7235d. 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/BRI7L2200005.