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 0xecf220afcecbc33c383e77610669e7fcad1c43c0ef47eb577ddb7996fb9e03c1. 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/ea6c5ea3-06a5-444a-86f5-4834aaa26595.json and https://artists.proofprofile.net/proofs/artist/ea6c5ea3-06a5-444a-86f5-4834aaa26595.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 0xcddd23c603d0da933944be2ebb2226419b2d2bb4197e45b018c70307f7aacbf7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAFS2173835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddd23c603d0da933944be2ebb2226419b2d2bb4197e45b018c70307f7aacbf7. 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/TCAFS2173835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebd03450bd25c9c44a27d75f338a06a5773a57c95cabb6b01664fa065cfa16f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGH2247241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebd03450bd25c9c44a27d75f338a06a5773a57c95cabb6b01664fa065cfa16f. 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/TCAGH2247241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2673b64635add557a2e0258102a79cf252030192672aef37334337fb3b788fb8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:25:46Z), 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/TCAGK2226009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6772baceb21f1ab742453a1dc32caa2f1fa87925d603b4166e64e2fa478888f5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:12Z), 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/TCAGM2230600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6772baceb21f1ab742453a1dc32caa2f1fa87925d603b4166e64e2fa478888f5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAGM2230600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe342d40747afd96c28f70540f75f6e27f4796382892897a0825fa44ed284ff55. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAHJ2305230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb346aba7e7714a9888df0e287acde7c2ae927fcbc6c0ab0c4e68c2ddf76894d7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAHJ2305245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9313429d857e1334d1e02a673a6ad1778b4c91b4aa00fa46dcb4ed0e6dc32b99. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAHJ2305310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe342d40747afd96c28f70540f75f6e27f4796382892897a0825fa44ed284ff55. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:15:26Z), 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/TCAHJ2305230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb346aba7e7714a9888df0e287acde7c2ae927fcbc6c0ab0c4e68c2ddf76894d7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHJ2305245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9313429d857e1334d1e02a673a6ad1778b4c91b4aa00fa46dcb4ed0e6dc32b99. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAHJ2305310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa776b8a2f67c586a63456591c12d6ad3c41bba681b7b8b6c27195edcfb210f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:38:59Z), 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/TCAHL2390472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75387b2a335bddef7b7995ca5a47a35272f5d0726eb6559dd1052afb293c98e. 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/TCAHX2419577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75387b2a335bddef7b7995ca5a47a35272f5d0726eb6559dd1052afb293c98e. 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/TCAHX2419577.