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 0xbbcba0450c97fcd3488922e9f67f8f42d91eda82e96c5c505d3b16ec3961d180. 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/9d17858c-ca22-4777-85c1-cbe25857adb6.json and https://artists.proofprofile.net/proofs/artist/9d17858c-ca22-4777-85c1-cbe25857adb6.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 0xdfe91124badcb72438c6d62a4fbb7317b0a15f7e60fe86b40d8b9b8289b51f3e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM24S1817617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb1174db8070891f63c95e8bcd20b71c4761c48fd9c3cec6db25a08e879050f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:38:39Z), 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/QZHZ52021910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28286fbd817407b2f2ec3709ffbc451fe42a6338c05955d60534764a933a87ac. 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/QZHZ42182819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe205deab818ffb7534c1fecc03ea9847eb8b04e9ba13bbaa15de960799854131. 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/QZNJV2186831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb210aaeae8b9d300c21d9f028622bd6d66b23c6eb2df14be002928f5da1fd20. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZ9452100346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8bf3b12344e9b9090af68d5b9108aa2a494ae7a9d3d6ca8070fc9c1afb6d92. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QM4TW2369861.
Don't Look Back - Chopped Not Slopped Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa122432badc919e219f633187b7044d3ccdea8cd9f8bb650241579af7612516. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:09Z), 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/QZNJV2361460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743ce3eaf49b3bd09f303b326c69473bf82482b688927e18d888520ae6252b6c. 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/QZNJX2497342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e89ba1b8b171f8c4c21f119a7529c802c2862ffab12fc8dfce5276ca182c9e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USLUU2500272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc240f7b00b3f252ac080e4a0131b58f8cae7aac39cdc58db8613145e5b4ed5cc. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:17:33Z), 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/USLUU2500273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc043da846fb52d425567afac1c32cc4adf27b85f48568375970224a3503832e. 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/USLUU2500274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cb45f50e3c52c70d5c029b70ec39ea5cd597c41360f9a45aa0b32d724614be. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/USLUU2500275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dd60dc58378209ee7d71cc10a74ec445977eae0a746b3ae687b7cf122b9ee9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:53:55Z), 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/USLUU2500276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eb93f9a1c836742555ff4cf6862f7f5ffeac9e58f337d0c6f058a44478496b. 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/USLUU2500277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aecec960ae5f40241f99fe977ae4b23ccd3636ab7b1025e6b932aa910e8d5ff. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USLUU2500278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a93137f6b39325fd097bbc68fca32886c5e04f77c438e08f9cc9ad2bd1780c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLUU2500279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05dac77ad494bf567271fdedf8379c065442e9dd257c4c4c25385ae6ee57f28. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLUU2500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e0812feaaefcb621edf4cf96c009f8d92f17d3838ec3f4c1bbaa1ca3aa19e0. 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/USLUU2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb024300547fd4f70eeac478fea60f566dd7c03db0eaa24cb71078eb25e42b6. 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/USLUU2301555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9705b9746399865653aac74a2ff39ed1156d8a79c7d0cfbf7a4a8b2a4b55d57. 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/USLUU2301197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf782e3ace1c59bb7faca38cfa7d64e14d9ae5072f21188a29bb9ac4c6a7b040. 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/USLUU2300806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cd97f2e82224881817d2a241040db358d3e06c10410e9b7662052a71a961df. 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/USLUU2300599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ead0e3e771952352f95b4f0a0f2eda16f43976550863b45c1b59198b36103a. 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/USLUU2300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7515dde669c531098df290c5abb23d8c0068a53930bb6dc3db48bd0b640d710f. 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/USASN2210151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575017b9518c77c9341c55b758d7dea9b1b0bb245a6854a3ad835d737c5c215c. 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/USASN2210143.
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 0xe90fac2a32b59fbf0457df0e686ccab5816ee6868dc969d592c4bd4a60ed056d. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USLUU2301643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b956e3e42f980829c563b05298695667a67ba338ca38ad701b19ababcbdbd57. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ42229849.