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 0x9977ab33ac088561c510d2762ca56f7e5febd839dbac1593baeefb3ac11e8597. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a952f3c-0b72-4797-9683-a4cb5dd527f0.json and https://artists.proofprofile.net/proofs/artist/5a952f3c-0b72-4797-9683-a4cb5dd527f0.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 0xbd6ae119072666a578b1f35b7c74fce0206095085073049fe168f097ca639d03. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:42:25Z), 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/USBAE2296878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0035a1cbde4cd2b9c12c46c701e2ad0d3acbc092e0951928dd70f9cef42a29b0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USBAE2296880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed773911dfea98e6008c086ec9c5c01a488f0655a22d98e6a165c54628a2c53. 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/USBAE2296881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edbbaccfd323cb3e3fead6200ea5ccf700d413c0129c6a917530f54bf1cb9e8. 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/USBAE2297205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1175d68954cab461038d36ff074003fe68930b8d812d093f357074af50260816. 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/USBAE1591599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29677d03a38eaaaa8511cf8f57298aa89a4338210556c0e1b821a8d6acf3f2d. 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/USBAE1591605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeeae24d6eac997986a7dee0a9255173b9f4cbbac0041bb5ff33fefbce62d79f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USBAE1102778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e0d834e0fec5c3b1e45df264a4e3f069de57342c6c3d40303e76abb690e9c9. 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/USBAE1102782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970571e83c8fed8cdeb1fd58dc74154665a7ceeb33463156291e4be4b1bd05be. 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/USFZB0900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ee76d97f09c0ad239b3efa041b1f82d2ababd4249ea963f94b50df2e67ca8c. 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/USFZB0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c852b32c4a396300a9af8fa26d60ae5b19914103b020e8f3c8013496be8bec0. 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/USFZB0601606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8520bb27f0cd4c5fd433121053844c34b328b2f525d8df39c13691d395423cb. 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/USFZB0601608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503b8b0a8a681cfc65a52ba7b9065249b0c62fc676d0bdb56cf3906b0fda16ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USFZB0601609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a4b0e77dead1652a803c659e05b3be45ee2d7a4c29b16f6dbe58328a8d7d09. 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/USFZB0601610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281fa55e7dc9207d958500bcfab099bcb3755a334955bf7f6442b1106cfc0f13. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USFZB0601202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f67fe88560c67004c28328b6c66b84a2ca4fe57020ba065035319dc6ed9f0c. 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/USFZB0601215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f96df8d0b2f970e1fe64a6b5d79876fed24964d97f6c3fca8a61257c77e2a57. 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/USFZB0601502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8acf0c2716a0692c56fcca596ef08f6b9a2a36a4e0d39670c3d2d194c22a66b. 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/USFZB0601505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f653eed4483c1ae20acb9fef8ca0a40a73390b138e59d43b3489dc92ead4b. 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/USFZB0601516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0035a1cbde4cd2b9c12c46c701e2ad0d3acbc092e0951928dd70f9cef42a29b0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USBAE2296880.