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 0x2135f15fffe121c86ff771d629b5df72eedb53caab2b641b85c8ef4c4f81d552. 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/978a0f2b-9dd5-4fa9-b33b-629a5f01fadc.json and https://artists.proofprofile.net/proofs/artist/978a0f2b-9dd5-4fa9-b33b-629a5f01fadc.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 0xce18f2e015a2698699911633cec855dfb8a545e7bded0de5ded325bd211df85f. 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/US6R21429579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792c74840fce50eec6572262464eac1115ab60f96e298ef860fc6053122239d4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US6R21429588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f34c403fe8fe4ceded4b0010e336d422b294446d9c5331a3e37423c7bc561b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US6R21429590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7482d864f03c0db0915558cc976e399b3c54cd66648165a4da600ae4ee263c9. 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/USV351412870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3b7afdec75ee4a376c40c92f7aab8abaaea4506fe33c11b4b57c72850b79c3. 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/USV351412871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14a2d06d06ab393645153dfb29713735a550c72dcc3b645a1ea8e94522a32fa. 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/USV351412872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8982840ee9b93b4a7a956ee036b5cb6d43a0378c92633f9c38dd367079243a60. 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/USV351412873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5401a938a3da726bf7f08ef0bb95c70a60c5122de48a7996cbd688000be2e7c. 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/USV351412874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf54604e5f9f82fea2da253fd333ac95bdaf42d8a7f4f6640dfd1637f89679ee. 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/USV351412875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5fc4a21602977f28c7d5fe389e71d7b1ac9572a2945ec51bca046b267cc88d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USV351412876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd792cd35459bb2b2c61b00ecdc3d121459c4b929f691907bb2f1907a1fbc685e. 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/USV351412878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1895c7ec93fc781194a6cedd8e3d6a32eb7381f53604108a6130acf5b804b378. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USV351412877.
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 0x2cba32d84b54247e2836c016c9cee0b8587d4952b2870fae5ca8743fead5e477. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USV351412879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cc6755f22da7ce1f83ab013085c173364d939467802e4ae43c8996b029a787. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTB32214259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf770ef0414c50bb098ad12d9af69d74ee51a50b47fff4204dba15a43d4887445. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:49:24Z), 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/QZTB32209795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03627396a52a528af5c8e1175ec4b471e4f74d517948363f87375d7e1d15d14. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB32209796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df90e46aa07532619c1af5bf3766299d9b4cef2187c249db2ad8c1eb906a126. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTB32208647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760b1523c5e04ad827ab7849890c7e20cd4b47023c19f3920ffc62fbe5b8e66f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZTB22266588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a016a1e326181e5ab02f2e8938bbaba16e0f4c3b150cd1b5d6c28494c82a60. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZTB32212796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd712ce8653b669d6227d250f3c5d7eef4e151e135e8144da019adec17da16188. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZTB32212798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5359171ac9880775f451d061d45c0b74bbcffd92b96788a415d9c4797780dd0f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:31Z), 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/QZTB32212800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc60eb5211af71043015b221c49fbd3df9efbb0f669695054fa81c9691819d84. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA371471231.