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 0x8bbf1f6430acbb7791acd78238b77ad798ebdfddd835535f33af1efba1566ec7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/843b61f5-bc95-47d9-901b-7998d1b31c88.json and https://artists.proofprofile.net/proofs/artist/843b61f5-bc95-47d9-901b-7998d1b31c88.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 0xa1352d83e7aec7bb284aa1ebbf553026d28e6ecd92bade22f9a65f74ea6c6223. 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/GBWUL2498015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf167961d122a8cf4e4ea3c02e4ed14d1f84e4bba2ed53ddbd4be758b4a30f10d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES62400755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda629943ebde34e0b0d5e4cadc844515929d47f11e843f66b5c12a55da003c3a. 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/AUMEV2402368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7954b449b03d3ee893085bbaeb4f7b2df629f62ce2af515c14770aedf2164a99. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUGBT2346128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd353f98922a40eba5aebd9ac6bb0b6f58da55b5b8dd82ddc7e90f7dc2208395c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRKQ2390406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb942cf7e9087e7b7034b1782a3e49aead7664930ad0c8811ca8e0447a433086. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBRKQ2364539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7417f9f1ab52e000aeda909a292a692eab8f78bcddf22b1dba64ecea14c651ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB72R2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5217ade8323ddece37bdd7c167461f7ab6197b47825917a2b0515706b737ae9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB72R2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc1bf7256ce50e8451bc1b0874a5cd2ea82137fd0cfe8f02b018f4ab14e6fc7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB72R2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5961d81d6ddaac6cc4f2cf3cd31f11abbfa6b34b9916ebfa5affcf90c661a7. 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/GB72R2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6350e48e0becd789aff1553e2df857a54d308de79c9c8f8b7161d3c419a491. 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/GB72R2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ab343aa99530b013ab03a4efbc7a02c7fe74f4f5976574aa4ad65f67ec76ba. 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/GB72R2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55e7241f669a534422779c4d473bcd06690cc55201116f3e54340e4e47a4ee1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB72R2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0bd2aa020bd4ea2c101450334580a6e743805d5bd46ce7fe6369fb97ec88cc. 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/GB72R2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb6f7c3339297529350b1266fb8e4125030e441009fe26b35923630d1cd7901. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB72R2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead19db09b876b4fde7598d7444de491e6db7b82ccbdf2412a12fd23fe9c7f61. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB72R2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8a07f0c6656c77184e934331de2229331c944f36b2058a489e31a218d420de. 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/GB72R2100002.