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 0x7fadfcb40958e72e2870e63f2e2f9699a2806e08ca3fe8dfe44cced4d4aa9ab1. 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/03455796-bc17-4107-9646-5ae0a549fc88.json and https://artists.proofprofile.net/proofs/artist/03455796-bc17-4107-9646-5ae0a549fc88.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 0x50e38ffbd200b55dbf8980b015ab9571e59389db3411bd8c725779d9bae652ab. 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/QZNJX2359013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5464cb938b1697f1523309c924d5b553493a22c2c3dfa51dac4b2081145e5462. 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/BCE7P2402241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb590f006ff02a39f6abffe867542676f36d5842c3803879474f9d0a533aae9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCTAV2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2f68b3a370438b623828cb9294f1c71f8ef2b028acb5dec2603f52c3bb2799. 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/QZGLM2555032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afe819985ec861ebb75609cc13be4b4ab4e620bc706ac58966f4832e9c9030b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BC3PG2500558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f977c93f7134131c1e561de1b605308759a6af655f0e6020f480d51dd35d36. 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/BK99O2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda052a54019a02bdd7cef83fb5a9c0558e843fb26f4a5fb67b307a6811455436. 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/BK99O2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7624d231f6b8c87f297929bf236a7bcc97ec172fa6482392e13ebabe6e2eb715. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BK99O2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00fd7a54ae89f2a2abbc92e8a226235b8db6f726767f068addb239a40bbcaf1. 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/BK99O2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bac80d1c438f438485332f84a1b1425d0b499118e308e5643e1f0650aecc93f. 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/QZW9L2422750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89385ab1f0227c618088fa002ffb63a609c0fc6aa5beb209b07861acec30a5d. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/GXD7G2292371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bfefccbdbbf4a2ba590484149d7e998e0d6d107974cd0171c9ac0b36d6bc56. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCTAV2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0274ba2a45a936f2df55a1756d1ff010f55562e5968472d0889484930a986aa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ8A2410558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67f6e7310e09d9aadf5b68cef4413d5bb681ecaf31d58e6a6819f48d5fbe889. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCTAV2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996af0bb1dbd7bd8de6312784211553302cbb07cdb8279a0cac76829abd7bc20. 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/CACWV2478318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6008263738fb6d9bf68e46c002becee583c70559f7805c59aa0c62aa8e6df504. 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/BC3PG2331538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801920f687ef0906dee79efb70d8e13a342ba3b5c5dbad6b905d41edf6bcaf5c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXSW72100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186eaea096342c81bd97cc047379e4818ef1910bf7d1836d0009bb737c7775b2. 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/BXKG22301027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bfb9cdbc21332c9a3f3bf0df7806716b4b28c523e30e592479817890bdf50f. 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/BC3PG2206832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01b5aa20e49035cccf6fc9628b929f1f87319592ab584b16a759e8b98ab7242. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCE7P2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa5c3ae9f147df057da1437f988379b4830ed1fa9c2a83811074bb171d44f61. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCE7P2500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7706384be96d1bf8a569a60ed07f405204ef1ef22813be0fd285f1d371dd94e2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCE7P2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31137a65f7303285cfd0b519b57434e4106ea836b5a7faf8350dc759a745e0d5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:57:26Z), 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/BCJ6B2300001.
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 0x9288243ba13801f033637dd694dadaf00ce6b2803e4e2105caf7ae4c4bcd32ee. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USDY42067586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf929992023c35147ffb359af047a7099c97b16d7bbc0644ddf9e985cc29f582. 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/USCGJ2063819.