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 0x87dde12d8b488e3b01d9dc0e53a4a687cb713c3efc424c956fbf348d8e81df97. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bb663fd-7266-436b-9099-63823e82f356.json and https://artists.proofprofile.net/proofs/artist/6bb663fd-7266-436b-9099-63823e82f356.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 0x6c66249e338bc157eb70d8b64b9f7090bd6efdb1fd407d067d656e927c351c5a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CZA751454103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b5d8b50bcb1ab2686dbe24df4e3dda1ac14ef536f76bcea351b6479fc8fdd0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CZA751859402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa190d7868cab88ef4790b5981e0bb28cacd627a1dd26f7f01205b5dc718287bb. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CZA751859403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff1c5356be2c132f6241a2b9707fe71ec459ded0d89ad80f0e25c564dcdf3ee. 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/CZA751859404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e2f107cd423d5384aed0efbb865aae513901bb46002601df377938d2e802d9. 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/CZA751859409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad68293946887e7ccb6a88a194454d0777308c0e29cd2581cc43ea1d18837bcf. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CZB872111003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd349a61d109614f588f3cd4eb7bcbd56fa0e1b2a3b4cd07bebcfd255d59d478. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:32Z), 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/CZB872111004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdade11f1cc05cace3e6a5ad4cd9af1db00aaef35ff15e02042192ba80c3c82. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZB872111006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a331739cc13e26022f3b516b90614134de91ee13810a4affb4dc5a98361ac8. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CZB872111007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8ab8d2ba89ffade73f0cf2836114d83c93a4619f0fa39837e28ae8e5ce9e0a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CZA752465601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364dddbc0d450c69e79e5f46a2f7ec36a25ab62ac485e1946ddab8597b5f15c4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:38Z), 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/CZA752465602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1061dbf48f69c631527873907c407fbb44194e144e2e5225f7019926f56cd3e. 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/CZA752465603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5147425229e667b9704d433893cf7008c3d1adb1a69ad01912758667ac262dbe. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CZA752465604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cf48926c1a4f39ed3d0f577fc93e4d9ed8e9b2cadf85fb881ab82d64c7ed65. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CZA752430131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057a3992610be50e4a221d877292abfa486e3f7fde7471b4e3d5dc77a1b61e12. 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/CZA752465605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0db364e89e2ff8cb5a2d4d189752bdc07a4ab6167adebd75bb459f932ff001. 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/CZA752465606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f85beddf0c1e224b760dbb0440852ed1b785c9781e4bfe76b9e6d179a1c9018. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZA752330096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3c37a6b10ce59b6e34b763267593c51e9c574768aad8ffd56e41e0c6cdfaac. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZA752330097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9bfdd2f8b2d28ae23aca8cf0a280e73d3363d38fa92c943b48386f183ea928. 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/CZA752465608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f680d75e94c8aa7024f5e8ba44b265ff8f12cf1e4deab7bffe7c7e7c1ea278. 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/CZA752465610.