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 0x1f2a76870fbdba52326a1474e0cd803b768dd6f09b86abef1cbd08d26804b7af. 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/c70addec-ab4e-4f26-80de-540f6daa7b56.json and https://artists.proofprofile.net/proofs/artist/c70addec-ab4e-4f26-80de-540f6daa7b56.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 0x700acde4cd4103967e82dd6d56d604b76f0ff6e4a23c033801736eecb5dc90bb. 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/QZTAS2406731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37fe109867e4c1b2d58159ec14686419c5ab3613324bade48a44cb594ddec3a. 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/QM22L2401879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaabca4a508f6c42fb9a18db4c70be5057254b1accb72fa2212e524caf9a21a. 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/QZWFE2380506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc693d6fe7bea0a283f8c56bfc533509b8844c37c6ae785bdf63c65992b0980. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6L2346517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91274f8935d752584990199a354d43f3f4df58a6934d492375066b17e1210779. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYZ2335499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9a27255ff8a7d4bdb78673808412ca10de9a54ef36ac251bac2333a097e5f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTBA2281175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7373408dc45c07ba6660e64eaa4de0aa36cb330c8d6e7383b794ebd0753b8d. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZTBA2281172.
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 0x628e6e4a5b74c7b82bf4c24426f57d58a50aaabe0bb116927706e31599ca491d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTBA2281176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed5212882233f961ca80d35af683f1413ca26de48735129dc9d51f709124c0e. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZTBA2281173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d75ff72fe6855f824c0db7fd594a69d169d998df38028e3490b52cc2ecb9c2. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZTBA2281174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0f8d2716d4a9cc733171c8dd343dc059c960f113539f082aa9e27dd7c5dac5. 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/QZK6Q2254229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929f8a4e2e28be665de35456dabe846ddc818034110765f4bb4d10613d6a26c0. 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/QZHN92238445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c49747f3fe61ee3f4670b7fba33673db2ab76dfd5e368bb1b2eb5bf64853e43. 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/QZHN42294534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2813cdd1d40fcc126692078c942bac301794d8d9547b5d7e5c8308238684036. 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/QZTAT2155087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0b977853a0af84b4a4cf5641820e634f22584156be644e3ee6406d5aef39da. 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/QZNWV2166103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe557314517c163313e5474269ecfa5f75bc76a3a0101b0a255c0ea156bac872e. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZK6N2173552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfd112e98a8c1908acbef02e8ba2b4f1c6c0a6b7dc8d56a1bb537b46adf3df9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWV2086575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aa65b6390bfb1fd3fb8e5549e8ab96f6639e5967a2cf55f6c9b534723f7bd2. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/QZNWV2086572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b5c7f65e9bc3d6416b634ec9165437f21db68f2133ba86562976d0b65126d3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNWV2086573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacb722150a908060bd42a4521369f387f182e1e0addacf3f54266c6fb053d4e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWV2086574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c08c778ee033c645cb91248ad5e7f97068202565e601ebb68402820dc12b09d. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZNWV2086576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84b707b5b61f2e3a81ab4b637414e8259a5e9871283132ad837bb80458d0984. 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/US7VG2345792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e925d88f004e9b33a8da965f6d5de13d5101a9a09257e0c2b0e4d4de1ee172. 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/ESA092233733.