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 0x1b00d88fcc8be075a26d8793be51a4927d9ee653240b597017d2356d81c71792. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f8b64d7-1941-4a61-a34a-eec6b0056b90.json and https://artists.proofprofile.net/proofs/artist/1f8b64d7-1941-4a61-a34a-eec6b0056b90.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 0xc715ac6e5fc69a190e0a53cb7e68e80850cb34cee0192a77d5e4d9a951a7ec17. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:21:02Z), 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/QZES72085305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c669d637bac46146d5b459e10ee73972c29de2c891099304a081579908f9dd1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWQ2083910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0644a4fc2b99c12a2068d259a154f0979504476dc423a04373eaafb46c74e5. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:47:35Z), 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/QZNWZ2190877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153bc97214901beac85997b5cb23d42d963efba0ec545faf44d6598d7b91bc22. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ32204121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53f9244b1cd852aaa547220cc6d93f9720b4975a5bd89e672d3e6075b1b64b1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ32205057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de12eae605a0252ceea8306dcf2080c8cb7c447680f332d8888f3c9a7fe079d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZFZ32262001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf9ce2e9a08bce0c2d3522c52b3bbc5b1b853a70e684afc10151198b3cb3e2b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA52257265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b08685990a2216a0d3bd5a58fabf5c2760c66eae7e98316e39ebd174178af9. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:44Z), 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/QZDA52252912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52afac3177f261a312d8be6038769affff6d7299084e321efe545d6527a8d308. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN82262400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf500fa38a9a72fcc89f88d369089948a7edc347b2eeff21cee40171c3b864424. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN82262402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898c6c84f664e6aab50ae19fdc9a02e6068c966d8538ec19f3a988b5106e7269. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZHN52217835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe583e8dff294c595643435288ca018cde7213f2cdef69bb03076ebf829e176a6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN82262403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4666e037e289df30ac9c656fdb2b4d6fe64eccd50f4e9c6e48b15d64144da0. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZHN82262404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaac49fb3dd4e019514a9f24e865242bd279df150dc5f626e5e8e73195704ae. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN82262406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156735ea96d8fdc7e1968ff18775f2c58b596fd3726f0fde85404ef0bccb4d7d. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:24Z), 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/QZMEM2203202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa723aca7d6a743995f2e0dffa8da4d86a826d1d496966115ef741d1c29ad19f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYX2185906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978eb127cad5610fca27d4f750943f5db6b53ee03c845adb5464ea5901d06440. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:34:51Z), 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/QZNWS2275604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d5affe94752c122c94ebcf00d467f76f25eb44fcaa180e34608c452f7186ab. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAU2272595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7e2f047c1a2e0be819de8c51c70d463eb890b5267c57db25b06a9948437739. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:20:50Z), 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/QZFZ22320514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cff7993bf5db9ecabb79b145ec45c1fcf61db1165087d1c32dcb6ebe065172. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ42369679.