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 0x80174e2d71739c7ad074c79ab8d6fb910f51aed749b7cf327270b6bdcc5992f9. Chain 2 (Bitcoin): anchored in block 953681 (2026-06-14T19:31:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/641e2d89-8b69-451c-a575-2964831ddae9.json and https://artists.proofprofile.net/proofs/artist/641e2d89-8b69-451c-a575-2964831ddae9.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 0x3e2dcb6ef116decd14ecfc5363823b37e0b5a5506d9c35bd27f45d2b9ff2655c. 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/USDY42029020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0c14247ed035d378e43dc60695ce7bcbac629c58825485c5bd110fb96d05d2. 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/USDY42029022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb111951e3f2bf144bda5a79a27d3bd150563e574a07c26186a4e7b9fed857c4. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USDY42029023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4527b932b5fd8a46455548cdab60d5dbcddd05bc24bd136685ed467c7ecbbbb0. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USDY42029031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312da0213966fa8a998aacc6954f312de0a020397b1fdecd80f54582907db41e. 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/TCAHK2334962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce82c6072dc5a73d7d21419ef50241539aa92a41ada13c122cf6a97d3b85a02. 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/ARZ961800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a000e74e44741f68fb77439f515048f9a4cb58b6ded3fa35823a80e43e40c95. 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/ARZ961800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2fb5d526eda3588df31c0f40424e5e13f0b581c00c0374ba7301e2404e4fea. 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/ARZ961800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c1a24ac3ede9dce6a081391ba009687c86f8aae9951600c0792367678577fe. 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/ARZ961800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce82c6072dc5a73d7d21419ef50241539aa92a41ada13c122cf6a97d3b85a02. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARZ961800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bb3101f5737f70ab79cdbbbc610ae823f1458be4e3cce2b4a70b46521492ef. 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/USJ3V1390221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcfc222207c94988f2f6c1bf3b77a681d9ed4018495f300fc57f94d25da5dd5. 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/USJ3V1388706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee565bfea142b3834cf96385b22e36843eae7e57d19ce6f20eafb0e4f44b7a8. 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/USX9P2459454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e18383358717a9d43bf310f6f7c15ece7da296f05aa91d776227c01d0fa9f58. 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/USX9P2459455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a617ebc7df5448a372b204d2576c85d325a8c1bd85d08213aa4d1f64e1dadee. 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/USX9P2459456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e1161ce47975aea13bcab39976f2ea9d71fa0aba67133a3fd14156b446c288. 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/USX9P2459457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdf5874e1019a5e7e489bfe68407ee1b2d3f25bd80c25eef3083554ceb94adf. 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/USX9P2459458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b638756be6c445b4dc5f36eb5fdb15d0d390193fdaad28fa31a3d7a61d254e. 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/USX9P2459460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd508a8c1df41334ebb8687b4259af2a73eaca4724d89b7eaab47379129cb38. 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/USX9P2459461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52c03394f21ab01316d5fdd1b4ae09a5ef9390d2293cd1d65736e1b4021cef6. 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/USX9P2459463.