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 0xc4b88607d95f297b4bbb4f2f2808092669526a092a39636f4ae42824f4bd71a6. 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/cd2f329c-8f64-4c4c-98a4-2455b9607f99.json and https://artists.proofprofile.net/proofs/artist/cd2f329c-8f64-4c4c-98a4-2455b9607f99.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 0x0c3f6a9bd50ecdd4eccaf96f9d490fb5a0dd5945dbc45aefc9ee659042d40ef3. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZTAT2198102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef075c15e5a394069b9cefa88d038785dccf39bbfef94a022d218fdaf629b8cc. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZFZ32254706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde87ae23a348da6c5c6ba01d5ab633bbb3fd4af6947b63c18d9ea9e8db6a553a. 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/QZMEM2291590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db82dde65e7f9e1c118e5c57c6f256140e341b581a91a86c9a9e33810fee625. 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/QZTBA2281700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3f6a9bd50ecdd4eccaf96f9d490fb5a0dd5945dbc45aefc9ee659042d40ef3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTAT2198102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf082e37f11ca5756a9dfab627b79aa39fd7b499a4f6eaf233175b996b75126e0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWX2120560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde87ae23a348da6c5c6ba01d5ab633bbb3fd4af6947b63c18d9ea9e8db6a553a. 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/QZMEM2291590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569c80f9c05296854f35246896606885d5f647b5d1b0901d94fdde1dd65b0724. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZNWV2266499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf530fa185dbb3ca96ef2a30249be297c949ef019bf9eef84881d8cca0fdb6907. 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/QZPLS2263474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9060042d96648b2204f935eeb1d24a94e3b8848711eb9599472a523597a542da. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZES82282334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef075c15e5a394069b9cefa88d038785dccf39bbfef94a022d218fdaf629b8cc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:40:36Z), 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/QZFZ32254706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db82dde65e7f9e1c118e5c57c6f256140e341b581a91a86c9a9e33810fee625. 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/QZTBA2281700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d941de7a0fccd7ed3fcb39a6632818c0912ddee87c5ad5fe988dbd4153731f5. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZMER2118125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e1794e0260cb488724ef970ec53335df24b58012683afd7240e8fb647fd02a. 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/QZES82397027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b0571d13861cdb81fcf9d6a0db9654432e5d3082817cbc705942760357114c. 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/QZHN62375837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3db24ba03095bc8169d81d31c7801932185f1d662d5c26ec94b3ee1b8fecf0e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:22Z), 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/QZNWX2394313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b89d258ac334e37d94580a85e286e310a07352c48ebeed43d2f07c222aa0a38. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:16:02Z), 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/QZTB52350191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930403aa31a773f7b4d4875a16ffc6730b23aa089658dde9d7491c3a1945360d. 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/CAF5R2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9602884ab840bd4e8da86291b969ba14c95a1a297bc6435a9e472eb4b4dd2b0a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:32:46Z), 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/CAF5R2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a75ac5bc5b94f6eee2795a74ba60c2d6c4b4e63bc39cabbcc6e76b390147a9a. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/QZC5T2400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0627be748b6adfa18b6d0c196a4eb15e8e339538276b6e362869bb298db02f1c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:47:57Z), 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/CAF5R2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6293699181b05c26078c66dc4ca37fd7b47d8c5f997e00420cf59c82dae33232. 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/QZWFR2478826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473fa6aa670e4e237d19d561425a26d17bb8a7491b1291f6ad3fca7a5fdd84fd. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ7L2543894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f7d1333550f319a93357989cd374bfcd61d9371174226a9634821b88ac0fd9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ7P2593542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abc1302f0d7efbbf72854319fb6d63ddcfaa13d66f02bb5359be9d05159e340. 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/USLZJ2515683.