La Tropa F is a Tejano music group from San Antonio, Texas. Originally named Los Hermanos Farias, the group changed its name to La Tropa F in the 1990s. In 1993, the group won the Tejano Music Award
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 0xca046487921101919c521c7e3cc41d0b06fbbbf781fd3809fbc67b037e6122e1. 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/f2624e7f-8c4e-414f-9b74-32697ff88126.json and https://artists.proofprofile.net/proofs/artist/f2624e7f-8c4e-414f-9b74-32697ff88126.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 0xcf01fbe13ab6bcfe099538db6b59a70a091d02263115cad16bb00a09ef23bdef. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USEL10000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5954756cbdbabe27f7232c266b50cc610ce2fb98fc96c64beee8d9192e729092. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:06:59Z), 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/USEL19700339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bcb00efddfd1910de6afbe88547da5bf3d1038eecd6fbcb6fb5560cda24658. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:03:51Z), 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/USEL19600166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d13f063ea37776906faab133df03b7bb8c9c179f26fe3b2201b59caadac6fb8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USEL19700344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa406160270610e72ec66a577a6032150d655b8f795ef04e5065daed4c34865eb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USEL19700351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475c2c558f71f89f27ac300465880cea58414fbf6ab7ab153cfabd4a1122c991. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USEL19700349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f4f7f22716600b65d7d05bc7d2dab8daa2adf9daa90994180cfdf343dfc170. 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/USEL19700352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac517280cb6680a678e3758067ff10a0c27489fa24e0d48a9bb6befb394ce5f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:45Z), 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/USEL19700357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62aa2fe66de3aae69541642e3fddd855239ad22f7275c5e7c81938390bb1d2b0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USEL19500497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ad82f246492fab7fea51c166da5ee8f5495a4bc802d31aa104c6459da4e838. 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/USEL19700584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692c93aa3d7b014f8290a1333af0493f70f7334faf2862afbd3e92c53da5897c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USEL19700342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90d8767b6f6f83662cab2114b0ebb3506e54ef534f52af7f9624369354658f5. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USEL19600161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528dc365e2a79ed8388edb79a9b872fea62c7c965b4644ce0cc46abecd2e382f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USEL19700353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2e1f8accd5472bc95ea4c9f715cb6e77d082c2214c6c6dcd01f34dccbb667c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USEL19700338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f437cd08bae2a52e947f903acbddd9a72354137f60dbafb3718a8dad045eeb. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:48:51Z), 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/USG2M1100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1f59f1790d932d6cc607a641c5b1ddf6578c15fd5470e9051aa796655b56fe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USG2M1100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb2ec69e7f6d4edfbace0148a323d386e2f9bdbce84e254a678c2755bb251e5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USG2M1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a74c77df54d3e0e496a6ded22be539d3856c2b1b5f7f64f30c7c8639fa4cee. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USEL19700336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd89cf6d2b04e3f63122b22fe9c74b101f932c95ccd43e10f157beb98b453e72. 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/USEL19700333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f637e68ec66b1dcc5c126109c12b266d46932986a844d2ebd15be2f0f194a73. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:09:31Z), 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/QM6N21776232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98b061b118d99725e03dda69da4251ef1c0a5e87e6395039ada42fd7b1a83ab. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USEL19500492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8ee0b256d04c893ecbf58e13e9b716104fdc8374b3fa68daf1ca44604b3bcd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM7281435106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2081660d8cc9f6649df81995e6318ad3c94733dffa88b62cd8a174252dd7458d. 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/QM7281435112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e78783257467c7cd0253425cadb562c44395f7f8fcf2651fc24a95f5cf1aa2. 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/QM7281435113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3da4e3e9a33a3171c0e76d8e9d01dd19ab2c1f3e6239e51c788a32ab9cab9f. 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/USEL19500490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f4f7f22716600b65d7d05bc7d2dab8daa2adf9daa90994180cfdf343dfc170. 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/USEL19700352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f4f7f22716600b65d7d05bc7d2dab8daa2adf9daa90994180cfdf343dfc170. 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/USEL19700352.