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 0x5ac14f8603c44429b4dbc94c201cc56b4149a5e4225435d64d1023a4d5bde506. 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/308df5c1-62db-43a4-85e4-5e462c689882.json and https://artists.proofprofile.net/proofs/artist/308df5c1-62db-43a4-85e4-5e462c689882.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 0xbecf1f6e75d349a11f1c4191b4f96b5bfe41b09bc9ca1588f0c9fc53dc1c7a1b. 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/TCADO1864534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9187da2dc12fd32701083f8a2e68f92bf9f951aaec5f50986e9e5b78019ca3c6. 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/TCAHJ2385235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eb17fa3db60d01514f01e9b6631937953b443df0333589d3c80ee62491a21d. 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/TCAFY2165322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6947def0b443a9a7c4771a1f44a9beb13b9206adc7bb230b37f7a7851109c7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMGR32215581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa564a2bcc8feb4b81e981a24ca9976d6abfa5376dac0be3c0828665f7be53bbf. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/TCAFF2087961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa831eb56ec83b8ce71e565b8d97f61d5931a653a0d11004e1f9c496b208a5491. 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/TCAFH2028090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428dd1cf98e1bc4d2bd0a4d396a6ab94a76bfe4554f3ebb11cec49aa7a9517db. 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/TCAFD2017629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7159fd03a77326ee412e45613fe291835a8d94711479be687cf96eb29782b7e6. 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/TCAFA2092248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1804030bf3186765225f578348edd4ba1bf529539d6320ca530103dc4bd8e406. 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/TCAEW2038909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2ca95598feb29d3d6a32297b9bf1f14ac6bbde7f431ea4872f54ea3f82d268. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAEI1936094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698485cfdc4a553384a69b9bf9a4e604c596387a9bbdd7369d49f47ff8bd712f. 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/TCADY1800229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d35331303a64d602431f666f41d9652b7f9ff51c91569e35f44735598e37de. 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/TCADU1854490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68676ef3c588b473ed5d85e092a4b1d16278ff0ed5b7f31a9007480447c98d7. 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/TCADT1880928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11e60a34d87318bb9ed0ed9f433955ab9303c60d95c5fecdda2c5fcaec47c2c. 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/TCADR1841551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedebc89980d16e545de92388d162a43d4e8c391f6636a0765a4fc1ff285012c4. 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/TCADP1897079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0beaf67a5c02c8766a630422ce7c8f9c0be38492cda711c6de57352b8e8d58f. 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/TCADN1898023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ab9a909d09b1c81d954db997efea3fedb7f607803117c9f8107f06bad72542. 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/TCADK1761117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30942766872d0a690e75bea5c4dd3a18a75ae2db60ffdb96235b8ac16fb7e01. 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/TCADE1772966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908fa59085302e876a47314b668dc4677b8bb1dcf726caf6daed0bf0d91f9a5f. 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/TCACU1617057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd6c1617519b40367ec9eb9e6a750695140cf9b8630fa57d269416611344f41. 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/TCADM1865353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a608eaa156268528d920e775a4fd5501d26852bc7d1829d456a6dc278df6b3. 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/USCGH2254709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2b26fc4204aece77cdd69c97baf0e7df746e669197aa3d2a3d88b5d0921614. 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/QZES82030425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75381bb313be3016a18514a11fbf44aecc1150dbb544c89bd802f56c128de981. 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/QZ93L2050496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d61a8c0e88b412a20ee4acbad45e45422104bdeb4e1566ad0310ee7656b041. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZK6M2466244.