El estudiante () is a 2009 Mexican film written and directed by Roberto Girault, and starring Jorge Lavat, Norma Lazareno, José Carlos Ruiz, Jeannine Derbez, Siouzana Melikián and Cristina Obregón. Th
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 0xd71bd6370dda65e58880040b39903626abfbcd2b5447e882a343956fd36638a5. 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/6cc82362-af69-47e9-a07a-d630ce33b5bd.json and https://artists.proofprofile.net/proofs/artist/6cc82362-af69-47e9-a07a-d630ce33b5bd.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 0x02952bd4c762f02041f172801c97e2a49eb8d821592b9d2fd8a09c70a7a08d8c. 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/PACC22300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc39e64c6d42c6a95030a99f964092aa908d1cdd8c80b10e5218fb95ff435e0. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USHM20661099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ddbb1e8bd5f41ca051775496658804a076e51ac0b3fde60469b1c52126e840. 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/USHM20661102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b76cc385f5c67de4af5fa483965f6d7fe7878b3342208f3ade281ea787399fb. 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/USHM20661103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50430d8d5b57a70efce13caeaece71c0c469a18c7f63be1c552f08e9f18ea834. 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/USHM20661109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5865aad10fb2f9d6c34ab49e24194c0f82eec0bd489ac0ba226a7ece384ef062. 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/USHM20661112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d8e4151a502cb1c46a16f626264a09b38f29319e7c5adf2fe02310d49c3b52. 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/QZXYG2400707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a26a90b4ea95eecda3b5394a48d3778f60e41e2a125cf4b9b2b12ae493e8bf. 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/QZXYG2400611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5c61a7366eda7e5cc62b157df15b5dc4eedc96a5ffbeda0fa8dab50963a26b. 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/TCADF1756706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58205145d2328d1127dcc479bece6329067a5f405fe43e7f55cfb41ebe3cf0f0. 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/GBSMU5648283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9746b5394ea7084aa9a4612136c46094cddd87ed22aceffb4dd7349ca64cb5c. 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/GBSMU5648333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a592536eb8c8f5df0146d612f760508d2f101491332dfa05616ebff7af70040. 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/QZFZ72016659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7940ba97ade16b5c54b0695597f4834924a88041a84183ad044393bddbba40. 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/QZFZ72016660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dbf5839ed6a3de6aeb2b18fc324d142724917d54e452f3ac7edcad68047862. 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/QZFZ72016661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb704a23be7820c3d10912450c306b028deca8730c2cd1a86b1e78d64f5740b8. 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/USL4Q2329592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac89919042c4311c5e77d61fcf83051b67d599343d55624a45eaa99670f42b71. 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/USL4Q2329594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a1618ab3e3a495769d2929ae283a72a896020262ca60157a4f14cae0081e83. 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/QZGLS2157490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161066913c1b3c2b102fa7e9425af87b8b66bbb17125e330ad58ef723bff5389. 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/QZGLS2157488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f6c7a73aa1c2917013e66f35a2669c96a6b7b5dfeb9f894a2dc85532c0db34. 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/QZGLS2157499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f094709e308edb9457a35673eeab67ccd57f0bf982e90f7f80d7df744d13922. 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/MXF600601678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e98427036bc62adbed81505c908c1eaa025b87c744b4ba7869d68dc33643c8b. 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/QZK6H2312152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eadfaf6fbefc0c66c48c4072d6aec7ec807ea0d518b551d3833830272d30bce. 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/QZK6H2312154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e521805b039953a1c0dc2e2b1560082c6c0d1207496bab42e2b9aec6c68b139. 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/TCAED1919198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21beac9857847a58ab057e930fbff8cd36eb2a6aa1351a9bdf36da8598d2bddd. 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/QZMEM2246012.