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 0xd3ac4651e6562fd2b1d4e37167a84bff023b705d49218f4616cfccb17175491d. 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/f414ae16-0db0-4821-ac40-12f6ea35ef9e.json and https://artists.proofprofile.net/proofs/artist/f414ae16-0db0-4821-ac40-12f6ea35ef9e.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 0xc36cfb7a44d731be817df47fc08fa866ea188a3b7b1ba55434a155388ae2d369. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ES56S1700543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5681deedad5043e45db86b599247a50a6cdb82c968fb02c23305090e57e856. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:07:40Z), 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/ES56S1700545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0800a4b97e8eaf789ad18535e05f20c159e65ffdb58a1560ca37197723bbfbff. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:39:30Z), 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/ES56S1700542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad760658e8d1b5255c6fd87f5d339c580ef4256f58d3da75bf9ed6a765fe6eae. 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/ES56S1700547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859d56012a6afd9396f2edc759619bc412c762a1a2188e16f79d8b05f608351d. 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/ES56S1700548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb56df05a8c7964553d888eecfe66763ca929f1f4efa6eb241d9b08b95046e1d. 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/ES56S1700552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25277f8e1e8a2bb90830b094c81ccc0cbcdabb820d14a4d61c043a32df955f5. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ES56S1700550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da9a302d1325c2b5e634b4b9b362cba6a6cda564485149badca5567d6d26cd9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:00:12Z), 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/ES56S1700556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a2b368c56cba1054e4cbd2d437ad0ac695fe5fcb965b853493bbc8d7c448a1. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:01:08Z), 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/ES56S1700557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008838caaaebb0c8eba10b51fdf20a6adfb2a4892784ae5b3325b766528c5634. 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/ES73F2500230.