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 0x68947673a1d02ff2bbb80c2fd232463491071d3d6bb15b152f9c53a3b3f4530e. 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/50375e7d-781a-4a4d-a155-9972eb169783.json and https://artists.proofprofile.net/proofs/artist/50375e7d-781a-4a4d-a155-9972eb169783.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 0x3a7e86064258fb2eb79c8ce7c5381b00d9242ae4ae53971219e8a1ee028e73b7. 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/DELJ82032670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a156c639d822ba8f45c5e8fbe3d5b34e57b8dc98a70289428c685a10fd6de77. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DETM41610891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccc3847892d7fa11708753567e76f646227a09ba491ac2cd0695b6655fc4cf9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DETM41610935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a156c639d822ba8f45c5e8fbe3d5b34e57b8dc98a70289428c685a10fd6de77. 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/DETM41610891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65302b96af22a965cfdf1cb0860edad04f2d3527dc7b55a6f104357921c199fb. 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/DETM41610963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a99e3c42a28d5ea724b3f0ccbb259f87a3263cf49ee7caf12b1b110e8f60f05. 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/DETM41610964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dfac92020e523224fb584fdc2f06396003476e1b42675406981f152d3ebc2c. 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/DETM41610965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2dec58764fd05b2e6c86654e928918319f7698c73e00f10de0c192a1235aa4. 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/DETM41610849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824733862782cfe6fc064d0b0cbabf3da31a180d4ba574a47096ae09057e83d6. 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/DETM41610966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccc3847892d7fa11708753567e76f646227a09ba491ac2cd0695b6655fc4cf9. 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/DETM41610935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca46fcd2624d2e40c1342e0c676c66a80baca1da37383837e06f0121cda90c7b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DETM41611015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a2fd1f9ca2e32d295a0aa55478b96ee0236dece785df3e135bd8610cbf71fe. 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/DETM41611132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8e0875e6d19ba591aaeaff86bbe3f2b69dd80560a82c991700311990d715a3. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DETM41611193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a2fd1f9ca2e32d295a0aa55478b96ee0236dece785df3e135bd8610cbf71fe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DETM41611132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca46fcd2624d2e40c1342e0c676c66a80baca1da37383837e06f0121cda90c7b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DETM41611015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383f5583a6d199a545c02ac63fb9e796d0de8272ef72a70ca6972cf34b4a0c5b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DETM41611196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea84d12f3dba751df3bd9572d660fabdda3edc79c17138a32e54f38e02d3a64. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DETM41611197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e1e05b9aba386b5da5331cd59e81681b1e98abfbf050f419eb3e8aae449306. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DETM41611198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394f3a5fa662462cc01561b566bdabe7ce7f0b25f07ea29572f383354e458ff6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DETM41611199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ea55c896ea95084ac3471a38679b3689663990277ebb2c6097a99e0e008839. 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/DEZC62446267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c84ffced128c7b01ae5fe39a6c594c0f54dec72231041677d1393974b7c3b58. 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/QZK6G2046669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a6541def0a10f52f5eca0a5d97521f90327d43fa8cd2a9dd314d90eb14f5a8. 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/QZDA72011312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbb47ad3906418799a8ae7e194d9d84f96bde89682b4019bebb217743ac3823. 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/DEZC62404333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1b00fa106de2b5e93c7c4d03237c8a8686e86e165a744a4d2143b2e3d2d9a7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEZC62189076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d60f42777b8c6520c12a345ea81f7f7ca6c5d9674cae8eaad0bdf9a9850d55. 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/DECE72101561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9ca789b222784c482866ee2bcaf34e2e6fdaa3508b7ff15a3adc39e591cd36. 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/DEZC62333797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a53d7b261bac66aaa6367f28dfb491ead655c7139bfe69e00b6483d1a1b6146. 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/CH7812225131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28e064b943e3ca885b39ccb02b6f8b50006234701e1651e7e0bfd489a293aa1. 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/DEZC62194754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66648705973978fc26454e1f4d398632f144418761a27bb963c75d8e2dab2078. 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/DEZC62194755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4589b69d850a18bee7270ea5167630320eadbf178a61151d35c2f7ce86dff164. 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/DEZC62194756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaf109c4b3e4fe24f5e2cb43770b0c956d228a1ec18ef934f71927908c37dc7. 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/DEZC62194757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9e64bafaad151781532ea708902d20d5b215dff91040b09a659ab38344ec67. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEZC62194758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f70b3624e33ee2c828c120f813f3e6b1902e62777fd32c56aac9d6921847c7. 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/DEZC62193227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5ae8c91f8718b529e07f2f4f993493683ad06f12f3ad2b73fa440dbae16981. 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/DEZC62171743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a9c9e8456aceb6807b567047ca551b91819b3ea262f3c1963078bb9ef57abb. 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/DEZC62023688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38794e94f58a1c3b2b6cafdf13f1e61bde2941f53e25c060e2fe2d80978656bc. 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/DELJ82042507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2081eadf1591198e3b802ffa9e4ad70978b5c22426bcd64b326dfbf68daf4d49. 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/DELJ82093034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3678a14adb1a3be78a13957b1f3227443349b1002b2c7fdf4a1b9afaee9a0930. 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/DELJ82074559.