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 0xd70fad4f37df901ebe04d53e77cd3e8ea964144d41f36c5350044bf8977cb7d1. 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/672020ac-0c0e-4f65-a6a2-0e51af5619a4.json and https://artists.proofprofile.net/proofs/artist/672020ac-0c0e-4f65-a6a2-0e51af5619a4.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 0x05f757a26572b61d4c7e7422fa874121d1e76dee997e1a6478a1c25465c7d5c6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA72090947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd259b510b2ccc72cd99d7fe3c86dcf91d549b6c7604029eab2ccba52c4d508. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZDA72090953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e2cd35c721164b44f03cda507a12b3f83a0bb1fb062f363240267009da7b7a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZDA72090955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58b8c06e27525b9a114ed73f9f02df9ed1025cc142bc745be51df234e191b79. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZNWR2003244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbf9ca5fb9d33e7812d77533421abd502159616d89394cb4c6106d38b50669d. 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/QZNWR2003250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413652b08feebac4bba31f0e7d682056572bcf1f5d66fb233ba772825cec6b41. 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/QZNWR2003252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7da4a3816c66a45a2eb50dbc3dc7159ba33e0ac1407f9df3a9a9b9cb96505e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNWR2003256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1bb19dc9be34d0fb495aa11f00cf1ef8c31f339ca517caa6c9278efc55c7a4. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNWR2082890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3176c0fcbebc01076e6959219594571cf528902507d708f41760a0a2018875c3. 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/QZNWR2082893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd752f60dd4232f4e0c9f9dbc0342e67f0d1fece5a1bea79483a17a47f9e6569c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWR2082901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a605cdaaae139a12e7ca1ac6f88e8a327570b19a8d9c43b5b55846a22b35cea. 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/QZDA62158747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23376f52854524e43c5cebcf3d0b6c2565924f1993f7aa5fb6d02e9302104482. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN72214934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2e6d866406a1f519bf73e52090fc387ba1b1dbbc9612448bf406091d1defbb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB22245641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef558b63a0cbf0bbc35393e51201dcb6141e393ecc3629b41db34a1e02696beb. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTBE2387349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ed501884c1d3ea626b6c6aff33dd5a8560aad3ee10c4a0ba9ecf4b9770bc32. 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/QZHN92533070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4348fa971164375b9d375f962754ce39979531afea4179ca3abdbf93f8a70bdb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:00:42Z), 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/QZNWQ2550059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018b2122a26f38c44b93482909f4d30f4cfe06c1ccb78936ee610ef60a5dd0ce. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:27Z), 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/QZNWQ2550060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3438df55194f82a84ce66199a089d8e2333cf45f5212d56c7d5ea4013ccb8e74. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZNWQ2550062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f333edcfd459f4a40ece008f6711250083cab06804c85ca25effa5dc94c958e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTAS2540512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8189edbd48a94954c4191d9c9d97a1a541a35915766ccb826399b905e04b247. 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/QZTAS2540515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f1b03fa23cfa4aaca552dda29cb89625916de1b23b51dc1f9b66be092e7693. 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/QZTAS2540516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a849352ed24c19046018667c5e97eb3f8578bd2cb9140e5a97cb510a90ae39. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:03Z), 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/QZTAS2540521.