Los Brujos (formed in 1988) is an Argentine rock band, part of the "New Argentine Rock" scene which became successful in the early 1990s. Members Gabriel Guerrisi: guitar Fabio "Rey" Pastrello: 2n
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 0x05c36e641d335448b33fa745173bb928418c4f531290ccf8a0d514f37854b500. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53aa283e-81cd-4b0b-a3db-9cd25fccce76.json and https://artists.proofprofile.net/proofs/artist/53aa283e-81cd-4b0b-a3db-9cd25fccce76.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 0x775fc04774e0158d1dd8fa74ad1c71fcdb9e62a7260a416e3b217b60c8359c1e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTPX2474477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d7c406af0062a9d15cde90148e71734bc0e344d47523547c7ceadb71ac8c63. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZTPX2474478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd268b1f5c8e09f71dd8ede5cd3b47430b9d32048a52448d112ab0652dacf9f73. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTPX2474479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d96bdea61f4a334166b2322d2c8e55c8015746528dd2d788df4e6adc3c7f4a0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTPX2474480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dea0527d47ce6d1db65a77b28d2ba55206e4c947c5da23342b956031a00d6e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTPX2474481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a33fb8b310e3834245bc84d09a17b06fe78c009cac5597a6e7823a80c6045d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTPX2474335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a2d4945bca72a2b8c0ce236da7711b82038f7532d2fd315079c8370bd3e71a. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZTPX2474336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c10d5dc7c7b92b7fc70b9acab4e173dffe3a1074870adcb169be06d775b6927. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTPX2474337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559a3c7c09ad5cadcfc57a2e9554f8e55bfc7aaffc576472ae16758ba552ef05. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZTPX2474338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f3d44d3c25e6249c838e675070c5d1c1521dd5441c8010a64c1f13deffeecc. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTPX2474339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d85b9150878ce7651c0fd133ea8f76c950512e8f33b02d83aa1cbc4355861bc. 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/QZTPX2474264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23f8111d87b29598e0265287607a7d0bd1807d29f333035e19a936e9eeeff9b. 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/QZTPX2474265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809e095d2b09782974ae4892729aaa2587407db21b94ef471c9c594c0087f821. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZTPX2474266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd8caf673f770c1ec100e6d3c60c90af17fe317a2b790fe73b95fe2b0b47841. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTPX2474267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d77875ac4be1f141ffa72193c5d2985fcf86f5ea610f8a1193f1ac7d3a3525. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:27:13Z), 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/QZTPX2474268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d6ece3a9b29b5812388f482949b47d3490b541cf79a72b8ebe76d75f69e594. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTPX2484882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fb63109f69e92617c2ae0736973400b9753a25acb879a1e7324760907e87ba. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTPX2484883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c11b6696921a4b97d0c3e55a9f76fd3f0b113ae42a5b78326b809c9c8c6eafd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTPX2484884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0f4249401db3cf187b5c1cba1265bd9484bd59b69d234ab686eecf3b386043. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:02:19Z), 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/QZTPX2484885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3567f0c1e2cffb1ec6aa56289a80876b637f8a1cd19399e8fa10abdb01efcda1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTPX2484886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ad5c48f9e3ed13e2446251033f4f35ba467db1bc51e713a77a7f99a1e3e084. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZTPX2484869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda365fd9774a94e94e16b65d80956be17ea152fd9a280b29c314cf77ff948fc. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:02:06Z), 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/QZTPX2484870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4448b2d684737b96f7a7220a817310cf0537ce637aad55f93fdbcb870c64bc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTPX2484871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8caba8a562d0905e458961bd76a5c1f0c50130981a6475bc7ae33004c3a094. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTPX2484872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0d6229d6e258ecca1f540b5063ddc81159be51d47fa8a7451dd38c86b871fd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTPX2484873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb81fda2de9bf7b9a977e4a2ad1db3e769197b940a5f131d0eccb31ab0a4323b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTPX2484770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea4c332ac09b8df0826b0738ee7d173f0785509edfaa6387c1d1fb30256dd8f. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZTPX2484771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd66a0348451bbced152dc1e69384172cb312e26f09e95cb01d7bf3e3145d8b. 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/QZTPX2484773.