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 0x38049fc429c6c6b4d14d6a92af994408edc31f528af23695b20eb4c0f32ec018. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ffee534-adba-413f-8844-2fd48517ed0a.json and https://artists.proofprofile.net/proofs/artist/0ffee534-adba-413f-8844-2fd48517ed0a.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 0x66468015405b71f71315e5cce0470ef359485824a30691bbfe556046df16168f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCAIR2407117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe358928cd8bee80fc1175ec6678fd19396fe9a6c19628f2fcd1f3f0141a5d8d9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:50:26Z), 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/TCAIS2407119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf608f437e03389a57aa1f3da450be658be811edc1cd56369ce25e6126d0f0703. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIS2407120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3543cd97b3e2c56943c04ddb97bdf86f5ecbc681c0a173cf4763d9d1e089bd29. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIR2407122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05133b24013594bd16bd30a236177605de659e28b2117fbc58992fd598c733ae. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:05:36Z), 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/TCAIR2407125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb378e3069a3719a0812a92b40a441a8f2a8605caa6f846ce80d56a1a0e2af972. 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/TCAIR2407126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08026d28030caa10b3d07ab75aadee4b633fa70369214d7b52c1f047edee9373. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:50:22Z), 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/TCAIR2407128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2759442a248c4aecba5bf730b5d7c0fbd67aad4abd9ae926714a24a9c45bde. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:17:22Z), 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/TCAIR2407130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d173477dc67cb76d0e6cdcc94a3a4571ff7732c8b5fd62d464c184325ddfb4. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIR2407132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c98d0d82e94d3e1372766763fe4d09ea194eb170e3b0318d0c0358e44fcdb80. 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/TCAIS2407133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b00eb51a904de3453308458d28fb606c1ab02f8671a2bbe6ac62da8c3374f8d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIR2407134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819a120d10aab54e6fc026797682615e2022492fe3130e1b16bfb9e76e203bf2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAIR2407135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07acdc80fb372a0b68c2b60ce2f74f2fe53a95292297684a8adf08bcbb6325bf. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAJK2512514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8cdaa146334b1a668dde34e0de5c755170aa207074d605936fe1f8c3850f40. 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/TCAJK2512516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5ce1ff2b66efa31275ac1744b9e405ba807e1c4ddac85bc0e731cefbf2c52f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:41:54Z), 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/TCAJK2512520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bb7ada99fd9608570120df9472fc7ef1e3bfa6346277080e3b5684a80050cd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJK2512524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5888ee912dfb936ba102957e5217102017b0c21d9e66076f9c34f8edd1009e10. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAJK2512526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cdf77fc2bbdc6940f57386d0e7bc09105f5d9ea1bf6ad4e19a9404ba77b8ba. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCAJK2512529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fef642ae0554c105d7fb2fd2f1a47eb573e4e9a4bd6d6ccc919ff0066f3eef. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAJK2512530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b236fc8d127f4dc24b95f60aa33ff5c57703501144057949a20379128d54e3. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAJK2512531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d2a0d1f69b0f3f20ada332247889ee9cee19b3601c58e3b6846c08e01cb20c. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAJK2512534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae77c15763dbf56823fdbb459ede0aea15cf9c1821f93252f92fb7c6c02af21. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:04:59Z), 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/TCAJK2512537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57ebf5f0ef17ea8f325a2750db502f98320daee9caa42991a3b7fdbf7ee41c3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJK2512541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013293b62e6e257e6f8323544ed0079ecf6f49e0b53f9f3d955018c27f5f3e2f. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/TCAJK2512545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe893cbce9e4d2d2f33c6ded4e7ee6c8ef4d61d388054c2e5a9583970ded9ff. 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/TCAJK2512548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4461f6147caa604087f89d64f491eb69a7727b2fd4f1f38497dcd99fa5e78397. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCAJK2512554.