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 0x47796d75fdf3d80d39fef887d38bd037da882b29a400f39f726b8b943e697973. 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/87c993ae-7ccb-49a7-bba9-56b14bd3a938.json and https://artists.proofprofile.net/proofs/artist/87c993ae-7ccb-49a7-bba9-56b14bd3a938.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 0x3888d027395437c107ee0379e5cf48d3e7c5459be3c93109e1435236825f277c. 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/COF012700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06932c02667f521662f3b0c4863d55be4dd3951f79b985e4edcd5b2643a0b76. 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/MXF550513655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d65f1f5a882a8fb999d2fe21ee9d2cb5dcd7fa8b3584abebe42cb15ef93753. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/MXF550513659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d85e5683e7393c8efb9e0954c96b8a6d8a4bc781c3a8705882aa74bd3986f4. 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/MXF550907638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759d60f547d9d89cf84c9b1f2b984d3f1cd1c7d44c3b849972c2fbc3192b2165. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/MXF550907640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9a09773e762c885060dca9552a765e8fa5ff539200ad78d71c2275bae9618e. 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/MXF550907643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa9bbc2b52e452a8d1c5d6fbd72b129a880f5b7beec68c6de9c2b3b0e64aff6. 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/MXF550907644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f2002c5c9c08010806efd5fa5aa402900bc8b11c7f0090582cf77d8d7ea9c4. 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/MXF550907645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f244e88bc6e119448f54da6c90cfc8a7291e2b2186b9cf8fce25d3305cbe1b. 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/MXF550907647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6721bac7a4586d4610ac550332d40c779226b598ea283085ccb6213863e634ac. 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/MXF550805384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109882c2d2a578d1f818355292ebab6b5d94436286376d1409d26c03e9558bf8. 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/MXF550904386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb48cf784cba8c3529c722b12963f8d4999f9a13a23aa905a818f1b7d7cafdc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:12Z), 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/MXF550904387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178f4a72897ef95c4f4540b5518c9eda89ad1966b4a3f1ba01c5c93e7a00f6ed. 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/MXF550804677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48918bb3d2aade8aaba5fca44566f7b1119ad0ee430fcb393acd4dfa1126857. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MXF550804679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb465a2d54f792238096ec5f68ba44ccf558defe403ee7eb07b7e094cb54eaa61. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:11Z), 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/MXF550804681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a9862ff4ddef07a6f83d0f0ea1ac624b57550465656e87a81e9acfa97a3bce. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:03:26Z), 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/MXF550804682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77423de7b3115d825edc9b045487eafec3e8a2b4bfda55f5e1bff0588fcb111. 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/MXF550804678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc795d55f6e95f5c2f7d6192a52c126d960b1087aa5122021e2d18380c530576f. 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/MXF550803564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff239828e090d4b0319e750b1429e8d49e4603b716ac4dd41cfca6c793002175. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:29Z), 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/MXF550803563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caacca91b7567ba137129d00395cf58618f542d9cd638045107e4201c980ce4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/MXF550805394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95bc9f3d43f950e2c62e69a888602998f0f197a79e7cd9ed42cccce97651187. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/MXF550805399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0405318ff127d03a70336260b0e44267da38afb3555cae8a4d5265a3b25eefa8. 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/MXF550807818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85355050ccb51f64c72d31682dc7d123442f2eee4315a397d8d71c9afa1f50ee. 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/MXF550807822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcfacc78c9b6e78d46929d2975b06039e07e75c2ff25efcf8332027f38fa0ce. 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/MXF550807819.
Agarra la Jarra Presenta a el Combo Loco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372ec8a07ce8de56e18694958cd24f0faf5aef16c5bbabddfec53a6ed7065bfd. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:31:38Z), 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/MXF550803567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe10b89ea780d2f6dc75d12eac7006ef226ad79a49c1b9568d0fe746f1c77d62. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:15Z), 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/MXF550803899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c75291ec3d0d76465c4db4d885c59bb816ab683223ac40b3c56cfe9075ae9e6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:18Z), 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/MXF550805403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b0c77de74d7f954a636a9d49edbae88f19d6a9d3d54afeacc0182c5b7a4dc4. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/MXF551705483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbfa0c1cd6fa38b2dd964f1fce6b8f5cdbf0c1608e49b5b5516a07775377d6a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:22:48Z), 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/MXF550806709.