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 0xb87f9bfefc134a5dc32df86ff44084edca26861a5dab4c3d277af39b98ba0b99. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87a9907e-754d-4100-b4e7-ca4cc3bf9c3b.json and https://artists.proofprofile.net/proofs/artist/87a9907e-754d-4100-b4e7-ca4cc3bf9c3b.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 0xf8c4a2a0edf04ff4387107868d2da3f646b893c3e8c09ba313a9342a4913ba7c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM21954347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45afa7ef6ab5c543593bc57ac40aca103ccf4d4a22304213330054c69c1b4874. 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/USHM91902603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22666290be5c98d52d0f4976a2494b7c1fd42e9ae4adfa5ad7dae0b47ab90840. 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/USL4Q1923320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8a4f68e1e941747a56e51fb340aa37f6648e821f12183e50aad86609984347. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZFZ32217931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed127f94e3ce331c59049fe3e3746a1a6bb787986ce086d06408513245a261c7. 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/NL3BN2200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886a882b8f1f0386088e1030baa48e902bc53616cf6fbfb53e4522ddb03c29b9. 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/NL3BN2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc28f4827d3dde5ac07b5ae841101240cff6c9c16040f8a5c5340f81341c676. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:23:24Z), 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/NL3BN2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7664e66d547eac056cefc991fd73d2f6bade163cab05ad0c56e21b96154035e5. 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/NL2BN2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2275e308793f2f72cb71411031a9a02429a0aabfa09b0b49a00fc2deb69f87. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:29:45Z), 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/NL2BN2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc54ce46119e4a5c490aad6a5a01f798f6801bceb3439973ff1582b01aa9f7c. 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/NL2BN2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cec93bf26c9d30bced7e88c0b94ee2e6447762db4b963bbe343d45a950307e. 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/NL2BN2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a18ddedfcd00102c018ba131e2bb7f94dc8c69fd795721b89a329786f002c5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:57Z), 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/NL3BN2200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1119229738414f8d6e1288517a199fb7703de2f89e3b2bee23a5da44d83e1e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/NL2BN2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3880000d2f7bbc0d34301156fadc0b38dd08b8505a14c7b4a4c6eb80b158141c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NL2BN2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e7bbb6ba60ab6bb5dc123fc826f41cfe924de252593793ab200becea7248a4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLCK42416045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd31ec60cf23afb1fa5575348a3a989a0112cd9991e58d56d9f64038c18d725a. 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/NL8SP2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33663ac2ed39c5d7877312cedf4f8a9e13e90e45e2076b72b1d31d5ea78625fe. 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/NL8SP2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd31ec60cf23afb1fa5575348a3a989a0112cd9991e58d56d9f64038c18d725a. 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/NL8SP2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e7bbb6ba60ab6bb5dc123fc826f41cfe924de252593793ab200becea7248a4. 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/NLCK42416045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0d3a057ad9a08b16166681e8ea912cbfdc3ab1605d4a81ba0d18dd0bc721c2. 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/NL5HJ2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc0576ef17466d4d867d9719e7517d39659baf704f3458b8012aca43f16d6c9. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/NL5HJ2400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0d3a057ad9a08b16166681e8ea912cbfdc3ab1605d4a81ba0d18dd0bc721c2. 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/NL5HJ2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc0576ef17466d4d867d9719e7517d39659baf704f3458b8012aca43f16d6c9. 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/NL5HJ2400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd6820c0240b517a75eb73fe244113b05607f557c22d7c8380142f294588ff9. 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/QZZ7K2493530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122aebb08402b8055f9dac85c1a0dcadcfbd84204f949a93d64cb3de82c13eee. 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/NL3GQ2100273.