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 0x48de569cdd664dadfda0dc31cd6a5729da2137d8810fd047fa768b62571278bf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e732128a-1d14-4bbb-a245-5cb47d038320.json and https://artists.proofprofile.net/proofs/artist/e732128a-1d14-4bbb-a245-5cb47d038320.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 0x0709a7aab0e26ffa956373c9dfccde73a004321472554b539c6b53027f8eebf3. 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/QZHNB2350824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57739ee745869e454895c774b9f66ebfcfa962c72b1bd2bc2eb598aec3d796e9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:39:52Z), 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/QZTAU2353914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766770bbe0a7a2d7d9b8dd36d8718e5d12be520a01045be5e624eda9bcc7dae9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFH2389656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c960881427f53d31825f22ac9c28a3c7b70e841425d0981b98d5aecbd6194e3. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:12Z), 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/QZFYY2410726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e701fab7b7347b731f55afb6d7b4fc3a732fca2cd127483f0f0ff5609af67b1. 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/QZDA72499610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee673bd9270218a35e2d52e37dfb72842b3e74abe683d5b99adce577f8b8ac8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBB2473589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83a336e4a41e18e1211ffc54b25169f8cac092bef895088cb9cd5f5a6a19664. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTBB2473591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eee2d58e5f631921944e31a142a392038112a942a805237661bbce5b395896e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBB2473592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1f6273cc0583d49e1845e52eb0fa77bdfd4ef9669e67ce2f9f1b87fc171a92. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZTBB2473595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8759711a67cde5298802af901cf1cc40ff1bef842d6ae83bbcd0916d4e7bc0c2. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QT3EX2429030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd43362dad01b720b1e532a7f11d3fd6ff7c8ad1cf1f917764053ce776bdff3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3EX2429049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7282f1abfbdc69c9c9b644c620267969006b4fa7b222dc3426da28a6e5ed6dab. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QT3EX2426854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d7650b51c46928e57d6bb74921852a33b59c1e74c88d52d2c9a80c9ab7692e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3EX2424712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154df95f8460e58df28cf693d4bb6a86adc805889a0138ad84c93d792628dd40. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ22587026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf09d8b7e5aa07b6b7fc5a9685bbbe43b27437add11e7e48ff6c781e8f0ddcc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES62521907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86d1f93cbe48da2cf8dce7a7fdb74d54aac1ef377697c6ab491a997338af793. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES62521908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afb4a98577d3ad13875b146c93e70f7a99407bec5c56f5c519507b732c60129. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZES62521909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958565e6ab106dcf16013a5ee748145fc2560d6b9639928ea8249561160c80bd. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:29:28Z), 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/QT3EX2429052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a3d812a6b4c06ddcdadd71e38e48e011678be9f2393ac9f38c4d9fbbab9bc6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:30:36Z), 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/QZK6Q2593065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f796fa637de9821eb67edd4d75e18d227f2087d25c96eaf64ada3c1bc174f6f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:40:00Z), 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/QZNWT2507093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a0536ab072485e583e208e3ee2c1b9e877f7161187e7c67b899d2b0e25bdb0. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZNWT2587562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab594d28bf657b6ab4e5ca2192936bf264be0434d5b25482c20c828704682579. 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/QZTB52569647.