Karin Pereira de Souza (born 7 February 1979) is a Brazilian actress, singer and songwriter. In 2002, she won the talent show Popstars and joined the Brazilian girl group Rouge until 2005, with which
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 0xc46539fbd701718c3ba21d56f9e7f30e1f615b7db7f30c2043515d2f662f295a. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f84be3a1-636e-4781-8ec9-31806472e3a1.json and https://artists.proofprofile.net/proofs/artist/f84be3a1-636e-4781-8ec9-31806472e3a1.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 0x251170cf9da499db1002de83467bc77aec9575823ceb042362bb989e8f012ebe. 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/BCKKR1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12a54e450c61931fdfc5bfa642733dc553402d6e09ef78b461120c888db77d0. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/BCKKR1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8672bb73885081932f99fb5a99c6abff2706005db7eed036c3cb85a2c8d5f3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRTVB1700153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa18107c92648b03ea0970eb6c87d92aa9e9a3a9cf05562353c0ffd28b32da03. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRTVB1700164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb193c8e3a5283459e88a06b29e79b474bb93344c46f8a1760ca7dbd3b11875. 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/BRTVB1700182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942c2e0cc5fc834d3f321adb1f8e7530496a682f624a7acaf4f61af8c63486a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRTVB1700189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5f60efb0f6e8dfac832e0425a5880faa67786fb8f2cfad11c54b58dee2f6e7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRTVB1700159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336b622278af4f90de24ee281a71e27f00109ff6292cc70253c0983fad322a5c. 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/BRTVB1700157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3acda16ae36e7cf7ac35a1be11b570c84fcbfb87b2029f5678a62103f00fcd5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRTVB1700158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0164b6133e1fcae12593570b3d046f70e55d623ec0052e49a31f69305f6740. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRTVB1700165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe883d8bb824145705ef2f000443ecc2eb84331fc830e8268498ebb66fac50ab0. 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/BRTVB1700351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfc8ed6c1b58a415d2b573b74f879abcd2074cb0f933f00e51f55cd1160026c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRTVB1700356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b06aa55a6e8b8be51fbbc35436ae3cf4ac463857dedeafdb6efe30247d37eff. 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/BRTVB1700357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338c37b446c54200c1a6d04dffbbb50420f14cd0f78f9bc08942bb7270dd0fcb. 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/BRTVB1700168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f8b5495401f7a0975528642564b1124274faee5a843f0a11de955349bff492. 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/BRTVB1700170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ad44b0a48d8d65af87628ddf324945b3ee3288eb0924e46f76f0b5134ce71a. 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/BRTVB1700371.