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 0xa1572082d9c09b0423cc381b09a34c56592fc4047d695d9d0e7486d523ef7877. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be292f3b-2004-472d-9156-7b495bc8f4b1.json and https://artists.proofprofile.net/proofs/artist/be292f3b-2004-472d-9156-7b495bc8f4b1.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 0x8bff5b95cff38a223c51bcabc27c3ec2b1d74777355487c3ca14d1581866caa2. 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/UKW3Z2101837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527951c8a4d22ca996eae59c6d4047c79e9fa1e11d41c9c9f7484c47b1434d11. 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/UKW3Z2100261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0994f9382b6fb997bbf40fbfc91a0e7164ee907eeb4ae80516c11b38ecf0e35b. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/UKW3Z2100173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb23969bfe28972497fbdfcef4ecfec53c0f2ba6954a3e0b2ebb0f4dd7d6d40a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/UKW3Z2100174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4bb4055c73d9df2c2b068034564a35bacc5ff0f50420f18ed6643a111d259e. 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/UKW3Z2100175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33edcdcc7476ba3476dac2950825c982d40e75668b0769b92ee1a564fbc61d05. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/UKW3Z2000515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717a3a1a35247937b786fe094d79a00bcb85cba08a69bdf2d2062939f42f334c. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/UKW3Z2000419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9082dd54438481d2e9ecf9486c8c83fef3b3583fff225f2464274bcd0bc030. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL1821889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41ec3d9aa9762f29813d60a5b4473f2f1fc8603a409790d5f5efa47f842491b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKPL1899965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc003a44c4cc1ad0fb4f5b07623ee3b19e796d4798e51d574ae8e2e436000f0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL1788188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81cd40674968c75be6f2f37431f5f06950e90b9a1ee9f15018f6f0beb9c14b8. 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/GBKPL1785346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a34659dbcc5a3e5716fe41173abe77ab7fc696e008914624f2945ecaf3be7d1. 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/GBKPL1784031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1c84a8e63015ea7ec3fbfd686c1f36ed6edab6a6cd148f11f444cca6e372ad. 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/UKW3Z2100774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255dae10cefe77a835f4ebbbaf971bea3175fa281fa5af282d94a62240bc048a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UKW3Z2100775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab3404db7ab29d1a3b7cdd33fda7828bfbcfa2a79d41024e9f8a6227f5efdb4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/UKW3Z2000603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d087a8abe4026b113fe296208d380a68c2f63cd17eedd54bf4d630df2e5689. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/UKW3Z2100830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f950a07123a4eb7aab67c93f5a756dc9ad451c717de819222a6784df962617. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/UKW3Z2100446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bcabb0cce89e43d0051f687cbe26c5ad82b49f5f545e8871cb66fa49968ed5. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/UKW3Z2100831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caf922a3231cf46585644e340534e8da6c4ff73abbb6c73f19c67f6576d7fdf. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/UKW3Z2000747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a87ae7617958aa7133d189c65a7ea82702679e7457f966fa75b0008de31352. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/UKW3Z2100832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aead0e305eb3c3bda0dfb61bb4451f28b7e63d5a9a5ace621a9bec1b26f2cff. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/UKW3Z2100833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcdf7ea916dd8c3300d888c3fcb12462c044247d42ea6b4cf00c5e44812a15f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKW3Z2100834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8623e24adc314441eaaa04d318970fb2026636681ed357219e8c9b423263a4. 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/UKW3Z2100835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45863a7195366de3984261deeac1c74e88f98d828cfe36f74f949e078a99a0bf. 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/UKW3Z2100837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ccc53cc6e30edf5a518732b8af9d857bf6754c1bee439ec48ac00908caaec8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UKW3Z2100622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316979f675e460b32492d14ebda1688e0ebb1f79410182839d552db12827e828. 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/UKW3Z2100838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1544bff2724aee74a062b29bd9ab0fbd285ed93ca2d15e46c2d06725912e8fd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKW3Z2100839.