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 0x45e1818a602985b1668e1f0f1e36837b55c1b5a901ac0f1be352a501a04f473c. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d652fbf-4cbe-4ae2-b726-b9ba8e1d0e3d.json and https://artists.proofprofile.net/proofs/artist/7d652fbf-4cbe-4ae2-b726-b9ba8e1d0e3d.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 0xc50ec1665e8d7a2b5d985fa093f624f5ab3524e0d622358187c96a31e34e62d4. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:48:05Z), 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/TCAJF2502240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981326c6a8c399b84ff827122555d96654963e75fadea45a0640da09012c5085. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJF2502242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd1444fad8b3e07fb41ad07cc3331bef5fca5bc19eeea51eb7606256eb80dd3. 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/TCAJF2502245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2bf1307bd10076ecee53eb62f5509ef0a95976f00c649f3649854871a51099. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAJF2502250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16cab2fc446844bafad9ae4eaf47d7a178c1ee2fe2633b5bd35e766397beb92. 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/TCAJF2502255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924c7def7e1b2121febc0b34acd32ff3810fbbab48cea16dd09659120bc1bca2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAJF2502260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd720cfa4c7a43527e6ae5531738593b397ad27e24cbc857a27a924e66d4c0444. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJF2502264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057cc5b5c7823c8eace99dfac62af63872601abe528c10c56b3d180c75960a20. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:37Z), 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/TCAJF2502265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e08f85c149bd1820da1656e62c495f41ea9caf25be4f8b9bebac526f04c40fa. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAJF2502268.