El perro (English: Bombón: El Perro and Bombón: The Dog) is a 2004 Argentine-Spanish drama film, directed by Carlos Sorín, and written by Sorín, Santiago Calori, and Salvador Roselli. The picture fea
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 0xdf73510e78d28349a5c2409a34ee23aa59b5c2fac35c3ab8be2f23df6e1b1f00. 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/4187cdfb-c14e-4efb-8531-5aab5a3bd34b.json and https://artists.proofprofile.net/proofs/artist/4187cdfb-c14e-4efb-8531-5aab5a3bd34b.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 0xa6bc4bcf631ec384fa59d788b690859de6d1e3edbcad1a670ddf1da60094b2b8. 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/CLAA22300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0077afaf4a5e4d7a85a8dfed0dba3398d9fbef409755a9ed85eee024c61e6c17. 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/AR5UH2300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671a9c0293ea0af7eae5fde95f36893e0cdc4bef1e061cf369a73052cafbd9d7. 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/GBSMU4527936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3654f5b2a50df918e6275ff98de244b340b08aab67033fbdcaecaf758e23282. 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/GBSMU4527938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b78ff4e3138aa36c49a1f0ec6ecf2d478a9ecc9428afb3e2ff7829c4c1124f2. 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/GBSMU5514001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb32cf1d8b0708dd7a5a1743b29c25a94b67a507ba54ba243e765f7ea547234. 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/AR5UH2300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fce8a52cdfdf0a5ed06df9d8da3e93c002fbe88fd72fa1895cbcef22f1b160. 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/ARG991040024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8b1c0c4f83b805d9dfaf79b4aa7b2a048d087a371627fb45419bf5031ef075. 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/ARG991040025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5795b9ef46a27fd2871c1bacf296446dcd1bc0e63db9c4fe894886f354494b1. 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/ARG991040026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceb2f9b0c74ea3d0deafdb04800d4923b6b88d865e5d75c9f32d27e6abfdd1c. 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/ARG991040027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec727476dd58b7976e8974bb5d50c0b1c9d27b1e06e04a8c71e8529e1096eff2. 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/ARG991040028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98717b4d82f416f8268ff75ec64b1aea899c0dbd9192e641203d913cf41a3cd1. 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/ARG991040029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf987298f10662a1d24e49bdbfe29471e73c21e1c920b1f85226f1d45828806. 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/ARG991040030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5e058cc1974e3f13e094a014ed6cec43daadfaf8314d10692ef22967202737. 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/ARG991040031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46124421a197446fb9b7eeeafdde26c24078dc8e09db072532a6f11bb2e27379. 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/ARG991040032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c0cbacaa4b947ff0ab7009b0ad97a14b0b6fcdaf15ea3e3c0613d7a64351d4. 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/ARG991040033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f6a5d9e4896366222233dfeba2e75f31a2ad31a0252709d708df5f069122d3. 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/ARG991040040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8e9b8ccd681effbf1cd9d78ed798235c1b26aeff5a2cffaa84c01d3e83fd47. 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/ARG991040042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77de888a1aa5bb5e9df31cfa2a90a1aca3cde648d498334390c37f9610922b8a. 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/ARG991043722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fff35338ae58b710bccb45a5ad70f0e9c5038e891d83a8430c41824b69fa1a1. 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/ARG991042357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6758949f2c447baebad07b0f64a2a17cc5ddaa7e44567cb06029bdfa1111365f. 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/ARG991040785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01892632879c97732698b68355f5c9b10cdb1c790257c54776b574ed6bac6a4f. 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/US7VG2367535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32bcaf18736232c5621cf8d6a71ad41faa8e962f0d9673dd4f999be58621ced. 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/US7VG2367536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb366264b4bac28666fb31f1d53323dda5ed5bcc7c0183385a5ccf9aaa1dd9d6. 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/US7VG2367538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb878185e626c375e76e868b64606026f6e55964768c68ccc23cea2541063713. 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/AR5UH2300151.