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 0x9d7f1eb1e6ffbcfa1b5f23e8e87795a49adb2b2bf89468c48f268d243217e8bb. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/921adf3c-892b-4428-b276-21f69401ad4d.json and https://artists.proofprofile.net/proofs/artist/921adf3c-892b-4428-b276-21f69401ad4d.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 0x6ad3df801862f3acad63fca051276fd4faffdf9bb3dfd4700e0d52366f5608a9. 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/HRB901400929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a2bcf560847aa88b3b6c4b03eb72b774eeabba320a298e0fec1f7fde23c24d. 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/HRB901400931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fa94b85a42e6b30713c67c6dff50ea74f5f49d292bfa2d2f9d567db64b7ab0. 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/HRB901400933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59b88b21357751ad2213c496d5fc388e004ff0c6a99766b7cbada1dac9dd968. 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/HRB901400914.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bb0fd9c733dff8eea2f9788fac1e60722b713994a49ce41a33a02dddb5f8f6. 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/HRA040631208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb4984f0aab809d9425cc35c2c65b237ad98b039c94ed4dcd7356134de88d35. 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/HRA040614656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0bac4f6f01d46bbfe3479b400211b226fb3eaccd9ae6c04b87699d142d58b9. 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/HRA040631209.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee86ed3c35d0c07b5355a2acf4c1d4a74527c0c1a09e092356d7d3c5cc8eaf4. 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/HRA040643065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6e007d4946e4c11fb589621fb215f44baa9af43809e2695a5c8a76cb578a04. 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/HRA040643068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5df4ec208f3e25fad46157ab40fd6fbfc47636ce6f095eddc1e3ffc54692b0c. 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/HRA040643071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f877eceb806fe78ba0a7c124dbf4544c41d4e56237fde5e83958a4045e5ee5. 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/HRA040543075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe187572d14863ea98fa56e1fbe292260b740f2fd5540ded716a36b8a980fb5ed. 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/HRA040754915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54525a7551334b8cc23837f2d22fab7b673e4100bdbdb0f2f51aa9d3f386597. 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/HRA040649041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581d65fafe3d0bc89303707ba50682ce1ac1c240c72c6be123ed76a45b09190b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/HRA040649043.
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 0xd57dfc4c841833461bf91f54925677e0894e5b8cfca151528684fbbef9683716. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/HRA041061719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695c252416757e45e514ae098c0af7d21faa65ff2e1ba39c570c98a47f92cdf8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HRA041063094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbf95a4ddfd8302847b7eabc06406e53e6b2f95955cce96e4fed06078d5da85. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HRA041163800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9757ed071aa4f1f5d5977768409498d83231ce33f9821ad65aba44d15338e672. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HRA041163861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbd6b6f8a6db4a74dfe571b14b69f4c4c6471acc19c457bf8fa437cb1afe3a6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HRA040649042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4aa1a3ef701d445865ae63802fcb92df37679debaaeefb121fe9f9737067e1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HRA040649040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b2e579fc78956cd684f2fab44fe8cf314407e1cea65480271fb9a1489f6c15. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/HRA040649047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1899d3f0ea798c7277128dedff03cefab1eaaea986f077fd52dccae8ec3fe0c. 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/HRA042391214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f5dc1ae7694377f33e61fa22a34462852c045fa66707f8c22e0ced063f45fc. 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/HRA040754970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59db5b300ff6fc37d35f244e56bccc0d79fca54a845a4e0f05e545289fbc7858. 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/HRA040754972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92d76bcd469be40243f377cce2fc4d9fa000d620cf1953586beea6955fc866f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HRA040754973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e3c31b2bc9f5b9094219986cbcb7bd5ca7c04e36ada9e2fef3c7324d6fad0a. 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/HRA040754979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef12bebf3ec4504858081b0bfa6a3af98dcf9181cf17db16d836d6a396b66c23. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HRA040754975.
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