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 0x072e083741aa0aea4ec76ab796dfdaf67df3c783a1091ef707b9a72438e32989. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22a6610c-c587-4200-9e12-c73280c61754.json and https://artists.proofprofile.net/proofs/artist/22a6610c-c587-4200-9e12-c73280c61754.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 0x1890f5b1ee34eaed97a34368c855618f91084f560fa51efd344657944ca85c5e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:40:17Z), 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/QZXLZ2400440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa466eb0c6e166dc2d6f4d4459f1775764f228e5c51ab02c3f70d0b5ec887be4c. 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/QZXLZ2400441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f68a7709e094aa80452eabaf4f464a6521e6c5be1d518adb34cd47df61fb16. 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/QZXLZ2400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ae68520847babec367389d463f003f3cb3e48559fdb8a41cba0e378b057dd2. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZXLZ2400445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf807f04219edc7c5c1c1f50b6daf3f7f5835ca52cbf17a8061b039e8db9b8b2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJG2545830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afdade1524cdcf6d184499ee86c40717bd949f0f5d96f4e73c344d59778026e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAJH2568473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081cfc38e8968cfe457e69a692974bac140f8e1275d2c6820b1fa37af7f9aa6d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:08:36Z), 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/TCAJH2567767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d722c16ff7308d1c90f45f04e687bcdde044f0fc29fc0da16978d2d2f04fc74. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:08:19Z), 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/TCAJH2567682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcc03396ba3e5dc581bd0f47d11ab5b5a56ac8ed51e504960cee8b7e775ff5a. 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/TCAJH2567826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5abb25dab24e05a223f19ba3025314b36b75f6ccd3e08c7d3d9f649aeeddb4. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAJH2568284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd686fb6a509f22df4e40349cbd555ac0fec25d6dc50c6a9dd6e8ea3bab0e6afe. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:24Z), 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/TCAJH2568342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c2771693993e9aca884d1958e1cba075731f2cc79d33a70ee248f6e264f40d. 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/TCAJH2568381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a160513f9e3ca301e6af8568381d3bf3a72f4539bc549c17c92dc7022af2ee7. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:49Z), 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/TCAJH2568428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d30dc125365006b039d4163548b0456fcb519b201c92b73e346d8e0c9040005. 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/TCAJH2568529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9ec2666d5ad4a5d82f4d5ac81c9f18e6dbbeefbcf43e39a6c8df566de4a6a9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAJJ2594924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0ad9d1e4fc721085277d175b6a49350d6c195a2ed8b18e102dc7e3ea6e9478. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAJJ2594974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d527bb3947cf3ee7a172e47ed79e8a4015a99512922ec2525e3b78a364f7527. 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/TCAJJ2594989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506f023111ddc6c361668351d364b4081346ab1a4284bb28bdf1445ef544b77b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAJK2595015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b06f300374506ae1cb638646c3f869c4b241f849865d2ccb5c6550e57fe2fdc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:19:16Z), 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/TCAJJ2595037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383195f960eb62f8f5f1339d12e058283ce73ff51a36fe4d1cb2b32f89da20f5. 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/TCAJJ2595045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01c9f2d25f1bb0262767c26a3ca818dfa8dcec280c88c3cb17ceb95e556a8e5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJK2571382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00004da75b33a5f043b3f76671dd58a79d8c1219f446d08c036208f50c8e2bc6. 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/TCAJK2571410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bd54923ac5653f32d7f74ebed57b115a5d2cfd01de1d7366fb1a45196f0fec. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAJK2571427.