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 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 0x01cf3270771505b0bc3ccb7cc1ae1666cfc205e90951957d1cf0a79dd112c05e. 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/5b370df9-ecd0-4864-bb26-8924c7349198.json and https://artists.proofprofile.net/proofs/artist/5b370df9-ecd0-4864-bb26-8924c7349198.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 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 0x7730d1eaaecf1c77a891b157e154222c2bc05ed81cf1a8e9188b25c821824289. 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/UK7NT2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76f377e74f53e90e2367ed25a85520492055ccb7692a5ea2b8a565bf3198db9. 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/UK7NT2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4806dbabdd9376f40c6bd10af19e91bdfd5aeffef4fcd7714e7068379d0673. 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/UK7NT2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7e78586782df881cf2b2470b3201410d26ec1bfc9d0d5735e06c058d13e53b. 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/UK7NT2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fb6333be5ad42ecb8ccb6a69df55c39f639170559ceb8fd270f87436365cb5. 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/UK7NT2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127e6c6511c2dfab3fc7af9f60dbd9a6098a330e65d3a38e29c3613467945304. 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/UK7NT2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216abd03743f17aee038abff6e7056aa6bf5f9f9442288236a9b308ab3c9048f. 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/UK7NT2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d63ffaa1b2b51170eb955707048a070830e063a192ce76555c083aaf7307df3. 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/UK7NT2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14501dc370087e16e8342d9314cc071eed9716d4cf83365993414ecc75b47e3e. 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/UK7NT2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c7adce7e902ed835ee3fe1c4d81d70d2b77e2a653d922ea4bfb96248445767. 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/UK7NT1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7699fe8e24c0e715f945b66f14cb6a019f981f994f0bbf340982177c64c5b013. 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/UK7NT1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f0f0b946efac26b87959ef0c7822f3615e30f682f5a5b66be0ce9d989e7a0b. 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/UK7NT1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f01980a02c2fbf26617edfed03e3875963f72a4cca0f5baf12199c2adbd2ab0. 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/UK7NT1700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4b40d43358eb11fe08ba2dbebba6d2726acafe35d432da77266e42f8973d2b. 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/UK7NT1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ebef075404c9bb1aa1d385b2d8ceef0007e0dbfd28734d81d24f345e78d083. 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/UK7NT1700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d65936d9686d98753b14be470501f0d7a228944fa17da2b62da98c821dbeec. 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/UK7NT1700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8850158d28cf8a6e1dda8afba37045ebfae3a5e2b3229100d047ee8b85e83cd5. 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/UK7NT1700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa1d88f6dd9de897e021a7748d05253d0be6b99abfbdcafc12830f9dd52e698. 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/UK7NT1700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbee30a4fef548484cbbdbb77fde8f1d274c903cba209c07c4e6c76483867717. 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/UK7NT1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d433d9985559d29e62260a23c7efb84c2e2b034a7a40d76aec3943fd686dd5. 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/UK7NT1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00412771e74be3e7f7600f66e1e3bf7532df2bb5d806efe80aec671436eb450. 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/UK7NT1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a9340581b59c81a927dfd545325e11eb81b9bd84c4772519e94dab20f98156. 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/UK7NT1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7b3eff57c1851365fd36493743fef138e65022b77ad62aab1f160df81d696f. 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/UK7NT1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f91cc4325de35b248a8db2e10834a2e0f04cd290fa261d0884b6e498499848f. 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/UK7NT1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1729ddfab18be831c001a9cac326bdf26f05d707d8eb578f0da73393fd1011de. 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/UK7NT1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2154d4adaf57d51d566296d760022f3b5abcba85f74e5d2869dd1288dae23e3d. 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/UK7NT1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8615604e8a58f7ee2c0fba76a9377fb97021bd7bd367098e39db0accbc2798. 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/UK7NT1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580c82963c83441d07bb9b78878d569a1f77997128be9c6c9ac645450134a033. 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/UK7NT1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec3441f125c71eb59afd21b19805ea5bb55f72b378768a6b0a6f406f428b1bc. 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/UK7NT1400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2704a392bb6bafc6aefa7de07956dc0ac27dbc196cbfb2681b18b10f9d9f4772. 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/UK7NT1400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d6493c603aeb4d27bd2b02dc20d60c56bb285d3262a5f53a46644f82943c9a. 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/UK7NT1400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17909ffb9aca054b16f6a5b094a30d63d8f69c2c3171b68f978572cc22218a3. 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/UK7NT1400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf36fb41d5caa1546d0a41618e2fcd316e913c4573de00b75c6522dab8cfa91. 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/UK7NT1400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3679f1cf381435eae287bc5ba462f0559c910f7887035cfbf90abe651dee02. 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/UK7NT1400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1c170b5d8894f33fcac349b448cb97f64924be1eafe3ed12a3455d8f162036. 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/UK7NT2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4e2eb7be97637e383f667e2f037243e80b754da55f204f0add931dc3bfa80e. 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/GBSMU0996771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e8f3649a037cb8c26fbec7649a2a11ce17b360def38a956b9b6418ceebb18. 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/GBSMU0996772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50604123bf76c724fcb51cee2c5dcd5442bdc74846b42b2e0335f316966eeed1. 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/GBSMU0996773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e0b8b40d885e4ff25efd219c9424ea6f1432091d316e22868858f276dae2cc. 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/GBSMU0996774.