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 0xf3f8bfefe15a628038dde2eae0499bc560aa2e476d664e58221d6f577432d9f2. 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/165b1a7f-c1dc-4852-b06b-f31f365fb30e.json and https://artists.proofprofile.net/proofs/artist/165b1a7f-c1dc-4852-b06b-f31f365fb30e.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 0xbce19197df3a475763e8c8dfeba0776dddd1ef9a7854863827ef8fc7a75fd8ec. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:10:36Z), 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/QZK6H2251857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23da7bca5f9fc1ba0f8e85007ba0e0f73cc960cf4c4a233704fd37011d33616e. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZNWT2271520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efa71eade4f157df2fa771e1b6bb6c45dd319ba43fa0ca3d02cd301c05c63ad. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZTAT2226073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876eaa90ef52012a16cad245e4f543913bc1d26c9fe384331ec85e37d5e54ba4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:47:44Z), 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/QZFZ42373743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e60a5183c19c55b344a8f6a72b4911fef413142868f4501a284432216ae6de9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES82353505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd03e3d21132cd7410b8b2c782a7f079d2106562c57cebdc5a878d03b5c41fde. 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/QZHN42345195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8607d064491884d51d096854706959ac51e9b6d6b3e4b016fe0af77bf9f7ecf4. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHN62326318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82049407820870e270a6378e6d4758c7294fe773444ab221eea2209812ca2e2b. 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/SE6I32388346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246de5a291be761fe200ef626798066c4613f187080a1fbe168cf384c4261aff. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMER2389707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9750fe621f9887eb979cec86e142b5a1274850bb35302ad74fb01b17961eecad. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWR2385002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9750fe621f9887eb979cec86e142b5a1274850bb35302ad74fb01b17961eecad. 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/QZNWR2385002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7555e484d6d076627c974076adf84320ac8909c9abdebc342ba052f8237a49b6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTAT2353680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04c657631dc3a24f9291e8135b2f970615e6af430c86bb19583ab99f41096e1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFL2371029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdde133a73a52e9fef6e35ee4b08e38574356d88bc3c0013ec009f45f2c11c29. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES92430023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f64b313fbc41a90d03f430d9679954a82048697b69f40a7466de4943083b04. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:49:22Z), 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/QZHNB2489142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668ccfc9830c782bf7975d628245cbe71dd217e555513b28da9e6a1eec398ecd. 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/QZK6H2451404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e014b6130ea2834e54e80d01b0144fc1f2766ed44bc58d02a98da0a5239c750. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZPLS2423240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1e4eff8588ef7828aa4f6032d46f6b18e0fce3851e43ef3e9b718526378872. 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/QZTB62430453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfb8f6e4ba747dfb488c9268a7b0932fd9990054525f853d269243d8bcb81f3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFE2481812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803b79ce87ffe2ee3f9f022766b03b51f63d102987bf7f577cba1b709c1e1a0a. 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/QZLBC2501117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae92d12459a8e34cdf503516e73baf05d5c0acd359ac458e3921270a5aac97d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:57:49Z), 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/QZLBC2426992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3334c2eba0b9ca47d1fb7899022b71943b0bb6d59c82a9a1908e968350d943a4. 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/QZLBC2501119.