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 0xb3d3696e958ef8ee2cc330ac66aabf11fffb85cde1df51b9892833f71054161b. 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/7de1168b-6311-458a-80c1-856e70c0d9fe.json and https://artists.proofprofile.net/proofs/artist/7de1168b-6311-458a-80c1-856e70c0d9fe.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 0xfd4b8ad6991a508eb508d2f90e69b36897c38b57424a717115a92fcbe410a072. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:08:55Z), 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/NOCEM0504080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cb4c9d8b68c251e1ffd8e27437a67efdc4e0620faf834b6cd695889057b02c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NOCEM0504090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5861739ae238b6e033ca7a2885782b53dea67320770de4296f1b2f47a59d4111. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/NOCEM0504120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec91f332a6f92d00f2949562f5b4177a1fbd09fa2dab1bd5aa3e3dea6d52d23. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NOX9X3049213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bdaaa27bb4a30061e5713791a91fb9a76cfdd93a034d743e68311cd67546b7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NOCEM0504140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae847d194fe162355f16ff05ea2dd0a1a68e7984a5354d0d93c453d70e94265. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NOCEM0504150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f10750899ab304acb0c355fb55f0035f45fa0578b5c078d6da1692eb4313b01. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NOCEM0504180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa443df768c2f2bc385e6fdf8e76a1ea4cb7d33ee6186534cd34bdd0723a4c6. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/NOCEM0505020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99591f5fb65c513daecc500485191aaf9fea5bf3410fb22be436f226f14dd78f. 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/NOCEM0505040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9187db14b0f5d08c23602aee761ca6bc938baeb2db5a4ec636ce6e2769c806a9. 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/NOCEM0505070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d107e3a7c212ecd43c6a351df1015e0100bdf807638bf981d0ac320d1eb69a3. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/NOCEM0505100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c15b2b98042f5de675109f93083958c6f9aff0ba65cef6fed7f79d66cf8a143. 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/NOCEM0505110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40423563950c5532aa611473c605be9fc13799a56a8b6553e93494b04483e29. 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/NOX9X3049312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07f50bef46787c8b8b51e906126f551786af12a85a766389d6754a4e50ace41. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOCEM0505140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975c0f2588f220665b0cd1b182fd4a0898aa7c8e6c38853b4a8ca7f0108e72ef. Chain 2 (Bitcoin): anchored in block 957685 (2026-07-12T09:26:00Z), 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/NOCEM0505160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742b68d0356a06050b1dedae8c2ae90739359487b94073030a51ac4e5eff61c5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NOCEM0505180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf022843d181741db89efdbbbe5f9b5786325de00d332b7f3886abcb36e67292. 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/NOCEM0505190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07f50bef46787c8b8b51e906126f551786af12a85a766389d6754a4e50ace41. 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/NOCEM0505140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d850d9a7f98676f1a4a16a1557a0ca1fa1bf23c61bce807433baa472a401d4. 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/NOCEM0504020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1c831c0cf732aca84f47aad97bcfc83e8f4a29aec11d722411a1968f279903. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NOCEM0504070.