El Gato Negro (The Black Cat) is the name of two fictional American comic book superheroes created by Richard Dominguez and featured in the Azteca Productions' Universe. Both characters made their fir
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 0x2b7610ead04acd5ff9f98ef8187600722c5f9baaefd07d9c55cb9a0865bf7d43. 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/77b372fc-f491-4609-a67a-1d7b70e6e86d.json and https://artists.proofprofile.net/proofs/artist/77b372fc-f491-4609-a67a-1d7b70e6e86d.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 0x90cd6374673fba6ca15b8483932a3f8c6eb0b59d7950146cc8cc0e791037062d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCADW1832275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e4707e7e5d9fa7b8b81637542a889c455d83867e22c3d85d085f9e43c4dfe2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W11505271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff80f876e9e32e7fac8972435dd89a8df4e7289e4990905c45766eb7a9641be. 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/FR9W11505280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f87acdb69dbb21edbf1a34665f6035b3e63e43f9777b0204c4e1e8f0ae9c5. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/FR9W11903068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cb596dacbf8b7347c2380f3b95e5ac84a1cce5a4a3368162b81aceb3dbaab4. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR9W11903079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa964b4e6d8e7d052fd16108333919adeb7d37043458825a65e26eed67005f426. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W11903078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5cd1db8d59eaf6e8caa4eac0355eaf591c1fd662fbfada570877011b11dac1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR9W11903071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefa7f71faa2a18fcc86e7891a729cb31effa272f681767c853ea1da3aec5de5. 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/FR9W11903077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356a9d12ebe15d889ee23f475f22d1a006743720c5a7b8ae9e025cb786bdf985. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FR9W11903074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6613e082617b1e313c84717043953364d358d491625988117730c02b5d106bac. 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/FR4EO2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108fc09023af0c24da21dcc81643f1450e466cfb621c03ea040286443bb3e64d. 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/FR4EO2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ab8597ccfa2b17d712eed054436fb207bae7cf00b4c01cf4ac0bbb1b621a3b. 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/GBLV62025350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacdabc1ddf65eef296557edb450469d9277c661250f6e736228cc9555d0b687. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBLV62025351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9145f2fcac62d4652c609def5813a3bd16bb406ffbeec39db0420d1e0457d7b5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBLV62025352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f2dac31bfaac9cf15a5f68cc7aeca4f2dd54439aa7c1ba6e4e419278805c94. 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/GBLV62025353.
Ensemble - DjeuhDjoah & Lieutenant Nicholson Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bad726562149a41277ae1fe1c85a18f2194dde2c4a94d53e720ba87b2051444. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLV62025354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3221d2c116adc176b260ec3a3d1c71a96543d6b1b5dffe23ed57812ed467d9bf. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBLV62025355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcd01c19f6db38fa27610d8570185fa55ee1f25f65b358fde043634171238d3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLV62025356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc760f9178d676709901c5aadbe69e120fd993c5a8964894aadc559e9fd251f2. 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/GBLV62025357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374aa582f2e7465e4535dcc1868940bc6cad5f8abddaaa9b2df1f49618e06011. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLV62025360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc78d66c769e9a6cd73d2ce8e13a5125c0e0afa7099f2c90c24e8a22f8e226f5. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR2R02300600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4194ead5097c807b0508b00afa77afa91ba5e6733060e2c56b564a7efe647c47. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR2R02301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bda6404d628ebc4775d6f8359bec73ae668a16b70982f773e9c3870f64657f9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FR2R02300590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074642d03c705190abe839e927f4b296f7c6d3e0bdbb9b018e6ee2fb1ea5f180. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2R02300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada4f07884ef9f1bae2f375b7a339f456a2b1decebf72cb6d7203ae59b5e632. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR2R02300620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456c11e1b9847922571e5d5b28ab204b97b39eff41c87183bcdb7c1754fb6fc0. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/FR2R02300630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44278d5332dba0f832d8125b4c05aab4657cbb91157f24b9af09b55157176684. 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/FR2R02300640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c20406c6cd478cd6e30327f525fc57a560455d21d5cf07039d0178590e9a62. 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/FR2R02300650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca3433b8be8e774dd17acdebd67f949ddad943b1eae4d7123f6da625c186bf0. 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/FR2R02300660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b1cab428c76d0b74abc3bc5788ca48ac468f6b54effe8e4b9b734d8b02764d. 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/FR2R02400760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e4b1d9dff84e383ebe43c59724098159a14b23a79f767787085377eb8567c1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR2R02401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d154de503eca911079b05887ade4405bd4130ff93e35b16a6d9947f22e8f205. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2R02500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136887e8f04664ffd36f72f98d40683fcbc5eccf00b6c093979704be8e8cdbf6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US6QR2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1aab73a7ddb9c134bfaedbdea336c4b83de989e6a43d8849b726653d5f6868. 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/FR4EO2200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1aab73a7ddb9c134bfaedbdea336c4b83de989e6a43d8849b726653d5f6868. 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/FR4EO2200087.