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 0x5259393f0150bdc56bbe7072c2daf0fd3eb6280d5ba29fa2a8dba7973ae153df. 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/95fc9058-37f5-40b9-9945-07785ca9f518.json and https://artists.proofprofile.net/proofs/artist/95fc9058-37f5-40b9-9945-07785ca9f518.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 0xe23fe28d715ee651d7e60de597bb69d1e0127b646b4190d8b6996c163975cdb0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:14:01Z), 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/MXF060801344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d6da1875603540133af8adfaa03803819a6e15d4bf712ae1038657c5254d42. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USUL10401377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a478ecedc09d082f476aa93527cdfe76f4d5d9e671250d6ac6b508c206bbe0e. 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/USUL10401380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56488e161e55e8e2b1b8ffab30554ea49ec4800d9c8b6f64127351af63a1e5e. 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/USUL10401373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c53ebc2586983301ec29044ebc26a37000fbdc3aafeeeed347304c6ffd0731. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USUM70731487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4837f0cb0a1f14a482d701b1d9e637991886a4806c32c8a7188139259e392e7d. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USUM70731489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5d2557c5e5d50039d6758ac2d06b665e385bef15bd11bf90dab701df416fa6. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:53:49Z), 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/USUM70731491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dea757e9f7ecdd19cc2351cb158b30502c30d9385dafc65798fdd8e2724882. 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/USUM70731494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d85a7e1e7b43fff478e188f85f210067197fb7fd4589625769d07763cdfec0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USUM70731495.
Kimono en Llamas y El Regreso de los Insectos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae66f2666a00cdd710830a3f2fa57f9b1c43feb9bfcb88d4f14be4c989fd899. 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/MXF171201946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c939d2cbc00c57713b5a9d4c2eeb8412e67c81499e6e9dffc34c87fe7b794e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/MXF171201948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc046f076677dad929d6c2803e87aae5ca42e67257f213de67ed8444a1a4cd99e. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/MXF171201949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc6ef4a3832f232812e04e47d6aa571563ad4b05049727c243554c964a38784. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/MXF060801347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aceb012db91aa683a1719a46794f633643ff4cd32e014e175dbf4175c86e8e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MXF060801360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9555cf5d9875b8e90d55c7d564be312e47329ad0659cfc9005a1ec14fa780fc0. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:24:43Z), 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/MX3741500843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5b57e94f12721d916a7d39853f1b3b23988314f2f2d2253cb1faf7c7c89fb6. 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/US7VG1620717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6e3040cd608e5e7d9c5cb5b1b1c31cb6f54d261d57379ef15a4ca1ae8b40d2. 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/QMEU31605871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683de2d8d2ba0121fec9a173baec5109b0c0f56ff8ad580875fb1db4d138f453. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:26:41Z), 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/QMEU31605872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0d15eba608254d372f66816410f6b9e2a64fa12c2b8294a0a8c959ac6c0b87. 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/QMEU31605874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf514b2f0fbcea426e0b577e6aa28af99183d84f537e718bb437125a1da0b49. 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/QMEU31605877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370a923b755834d726b12741b02de4512c2f836a4512922f129be612677771e5. 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/QMEU31605878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd603a81b5a095bec4c8a281926318568d2235e2d27b75152375b5fb9dfe69ce7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESA012164004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfcd6169e247abd46ce166aaedc7fe7afccb8995e33b87718e4f3fa7d6add96. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/USUYG1720861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd87772497defb2fc87121d791e8800f6636e6a0454a35146315f8b74ed9f2fd. 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/MX1721500655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aff71dafe62767bfa3bcad1e5f32f0e232c3c005c148487278eae9696dbcde2. 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/MXF011300395.