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 0x6497e718a79c6c0bed462884aa2e8b34e2f49a6505bca16c37ff58fa0f69ad8a. 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/c4859373-d003-4878-858c-ae9916eafd4e.json and https://artists.proofprofile.net/proofs/artist/c4859373-d003-4878-858c-ae9916eafd4e.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 0x24482e09d0884eee89777ef26ee8bcb9f97f20cc1c90bf076c0c9134a3d314a7. 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/PTUM70700151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2932b43d85769c097f05eb27eb071fbd61e905335a2197e0944d8888d2a7be95. 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/PTUM70700154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc219eeff408217abd3ab3df48c5de2703cd9383613195aba2e289afa612aab71. 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/PTUM70700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752ff60b5bbd639e00c0449fad23128832dc5678f19d9dbb1376459338a60481. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PTUM71000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb95b48618908408c74980d60ba80ab74fa6c83f6d02cb85d863bad71f8a707. 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/PT3ED1800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbe56515de978eb322e1e82f22e9e1a0e7c4ea2420678a84274ed79977d6df0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGH1999951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6f0f6f18bdcba034dbb03bde608219bde43ab6f504f51fbe70a5906cef1ec6. 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/USHM21954428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b6bc1f3182dbaf7dc502512b9235656589496ad2ba421923a4b2643529cfc4. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES71G2008352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774d767bfd8a578d0fa4ee6209f193ee0f0e8e0ecf6f5bcf0e8da5b57d3037f0. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ES71G2142421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb2f3b03fd19a5484e66c24a1ac5c7b40673d13e0733ff0e32f5c505ba5ec32. 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/ES71G2142428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2945225a9cf13401c8a7403187c474b013be95b7718f22e73476909f8b66c007. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES71G2142431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55684d2cbe8d38edbc3d4aaf9962474835df05559703a41a3688fceaf222f587. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2142436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c001e66036e640180c7f5e4a08cec7375c39a66501b34ef843d15c3f9e9287. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2142429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5397a3f95cb1c4bb76b22acbff6ebf7ce2de9d9a7a57aad9610d6e3920b9498d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES71G2142427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0376d458d12e6b656eb3b0bbb9cc97827fbc9ec743f22389ae2223681b924842. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2142439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b5af246bf1983bdb19f434f6c483624dfbab13b78dda84f2457510e523edad. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2142424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f02ea76fcb1bd73b8484a05cbfbec44b9014c24cf63877f23445e4d3ba7093. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2142425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785a5acb086d6fb46cdab9d15e47790716a52b28a5776d442dc19769c13d2894. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ES71G2317291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0993256eac43c87645385764570d17ea4b2696d7b589d24273e9db729ce0c8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWDD2467099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5dfa33236e34cf197c11495b4f8f42a4b1f3dab3ccfbe15999f826a38556f7. 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/USLZJ2537682.
Extranjera - Primera Parrte (Portugal Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f866bad60994eba7d5e6821faad8dc48bfb62f0d01b00d28c965984f0b887b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MXUM71003903.