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 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 0x940bd6d0f78911a3851884740cca9df9243396147bb5d144b53c6b0f645e01f7. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79134cfa-6b21-4944-b5d9-bc0f1b8a9010.json and https://artists.proofprofile.net/proofs/artist/79134cfa-6b21-4944-b5d9-bc0f1b8a9010.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 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 0xf1178fa85357b0c4d590693c1ece052588f7f7b92f52dfd1bb1c40fd056445f2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BW1300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaa6deadd12d74357d1d85f628e7c2778e21064925980deb0373909d51096a3. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/SE5BW1300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb325b37b5106b65ee21792f99c5b2eba62b9bb375cec5962f50aeeefd4572b73. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BW1300403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abc8643371a41b1573382ca8f650a022a8ab992847ff58727a8c46e8096c145. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SE5BW1300404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe421bf77ce89e301290bd0156095fd64e2485dec41a8616232b13d39a56b8e9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SE5BW1300405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324c61c609dbb9d1a191215495fbd17a22ae4e7d539a51fe55c47f660f1ed962. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BW1300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ac94da240b3c39e39ed68705b0b95fa716814c7fd642e6cd53de3c79783bbe. 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/SE5BW1300407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df78802eaa68c6a013ac73319af9e365de6433e06f51e7d0e2e1f435ca57dbc. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SE5BW1300408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae7748e5ff05ff2ededfeb4d19d9834e0bc787ba461c6f3706945d453aa8bbb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BW1300409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dc41b56283bc40d6da2b63dfd772f64e9c7ef22c268a660ef7ef642a6cdf88. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BW1300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5dd55d80496f5cfdd9e5cfe0985bb96c8416bb034e0fdc48231e9d80eb2348. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/SE5BW1300411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65bcb4179a2a08618e4d306e9fbc749c0ed647843b6d6cd11b7bf800f12fa52. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SE5BW1300412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361114f4c618b2c7bb99dcf22e7908459a97168bc87470bf7881a700976c2ae5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SE5BW1300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7865bbdd579fe70693a5354b4d5424c6e6628202e49afdf002d22fd07970218. 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/SE5BW1300414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1963172969f143c46d7dc1a5027ba858c7c1884adeb5f1bbc89e5ee1dfb2332. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BW1300415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e911f96c1892d6729e21c4265eeae9372a7692df7d447cb170f63747b97423d. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/SE5BW1300416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82678c9b7f728b50318188d25ce4f1d8f5239b62ac357abbf1ea0caceaad301d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE5BW1300417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf62f2a427912c302888576a5b30502bb337d12d586cd89994c16caf39c1f42. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE5BW1300418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd199c72eed3b70f5db100e0de7181cfed8a86f7b372abfebae5949de20e64b8. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/SE5BW1300419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3759af13b0941a52e2da090f9d47193815f873e390bb71c99a29a90e09845c8f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SE5BW1300420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa4538a96a3a11eda8597e633df705229837e52316da5921b56af0aafe6d04e. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SE5BW1300421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f1505c0a5b48557f4a964133b47a6444aab215294ffc8c267f2ff192142c21. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SE5BW1300422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf665fc6a2c28e35e4a4518c4f2331a8bdfb7345ab93b015326389112ff2bd0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BW1300423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846ba4fcecaae65a126bb56e651a2b7a2addca4e4eb1f0faf2dfc761a504e7fb. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/SE5BW1300424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cca68dbc0c0d71741e28f7fc59e01998d5f0efef963d271ff8f8a8fb8e5ee2. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/SE5BW1300425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f1af242ce382d162e157d3bdf58bae2c22ff0b45679555133f8f8c89839c60. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE5BW1300426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a37bfacbbf035318947f122468b82e05814e33cbe5816fa48c0f30885705ab. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BW1300427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61602ff388423d9887d0c7fa5d224d6b5bdb5cb83af0f54ce8d1833e02db21ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BW1300428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c4d94aa7b5a920e74356383f5650bcc8464d06674e1e56b9267012807d145b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SE5BW1300429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2593bce1518079108eee6783ab4b8b841f89c5a44a5929beba039fde2a4e745e. 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/SE5BW1300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eb354be3de45b078b447147149b7834551b7ec6588af316fbe0bf048ca9682. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE5BW1300431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23121d692a9d44df8e92b51f5d01419f1078269a5c026d6b791bfa68fa5cf814. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE5BW1300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd246d01abf8c3ec79e985f8b6b90e3cf5df27025b119bedf04b29953b949ac0. 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/SE5BW1300433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f46fd4b9b96693806a2b088e1a1577b1007fb08be4f6932ce4f3a6517ed959. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5BW1300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7ac0a9bc81b719238f69c1879f082dc35c41783125679faffff6d8ce1762ce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5BW1300436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b71c832e087019ba2bd619e3f1f5f7c66d39a3b06dde13ae171427ec169fc9a. 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/SE5BW1300438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b570911d23e046350b7b618e53ca25ae62104f36fdc9715c7850a9af67f2f96. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SE5BW1300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308def14fd82b26176bdcbd6e6ce240fb76623dbe4be49c2cd66ac19d12f3db9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE5BW1300441.