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 0xb17793cdae0db4cea41a5a1a86f2a8025b3df6c687dac42c2522e20335a66b8f. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e33380dd-a97f-4618-ab10-f54884bfe00e.json and https://artists.proofprofile.net/proofs/artist/e33380dd-a97f-4618-ab10-f54884bfe00e.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 0xef9b87e4d58b4853d274ab6b7797b923a15bc388738387d129e85678707616fe. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:10:31Z), 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/TCAEB1917019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ed6bbe8312983679d0a8403a7859b84be9df9c44b4b140bf455fcb9c47160a. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TCAEB1917028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45466b0b9025abacb91e32eb9e30ae36b0eb9091d47b03cc07aa422a389b42ff. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TCAEB1917032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa404dff8d64b95972b20b7f8df9e7e30ed3f96413d9846d155b04d52037c18a1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TCAEB1917035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b58510107eb72b68fd6becb4f9dcad6d156ae899d1ce4fb19008e4a313767f. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:09:57Z), 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/TCAEB1917036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d0e2b24bf4dc9e2a13f7ae357b32185ff1ba8bd06cf70d72a6f4203bee8ebd. 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/TCAEB1917040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3b3c9dcd3c2dbceb3725dccc27de721dcf235b0fc01a57e5626b3aed377208. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:52:52Z), 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/TCAEB1917044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc302ede8f228ee64d575b9f003c2d4da385072d64fd9b3402e0f655a9dd0abf. 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/TCAEB1917045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac12e3a07d07d3788239993b0cba57bd3083ccca4406c68e85811eefccba809. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAEB1917047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be6d823bee4d2cbf8ae2611a3af2e4ffb1b5a99f22403e85421b98a9ad30f32. 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/TCAEB1917056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aea18967f6385d400986f6fcfef7bef03b3ec34d18581c9a40b93bcaedacc91. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR96X1743322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cc044aca0f32254ea28aa12413d2876ef31fcf8156aefc90d5149fd4656c7b. 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/FR96X1743323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ab6d154c533206c0394efcc2db337513e019195ce793c03f895ed3de6539d9. 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/FR96X1743324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcd88ee497dc1300288c6a2cce409de777e5828f632e440f6380bf2c08c29f6. 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/FR96X1743325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac4a84338e759d9cce67d42c06aa78940fa55121a891cad32150f4bb0ee2a2c. 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/FR96X1743326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71504df0c0c8d2a1ba31be965583829296709d920ddac05f2b851b3f4392a87e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR96X1743327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d2c74e8d4b5d1c864a4b5153ba9f101bcef46da3aebdb3032d030e787ff70e. 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/FR96X1743328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecd230a6636a39dfb2804dc95e9b2d64469a019ae0752e8d1b7df817585d171. 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/FR96X1743329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa888d088827fddb41ccccad0927c55093daa6fb7b962437272ab6a3715cd4c13. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USANG2450604.