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 0xcae8327483891c377c9ddcf7a000c8749792edbbd76e227868f8cc5ec5b39053. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dba5c0d1-27ec-4d69-a7bd-d66c9186ff32.json and https://artists.proofprofile.net/proofs/artist/dba5c0d1-27ec-4d69-a7bd-d66c9186ff32.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 0xd2b71e75666b381fe25a7b82b0d4daff343a8651bc7f1445281991a8ba5174a1. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:37:10Z), 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/TCAFL2139201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4160f99d34871b1413395cd59677436ed941fbd208cafa58664191e9334bc95. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFL2139129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa329d7b8e36a13ca3d7e97d646346e99204b9f7d19b4041ffcea29104085f9b4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFL2139120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59425d511dd00c414b475451b82366e4743ca27ae808ee4d5f165a6c6fe5b5c8. 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/TCAFL2139123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cbcafdd013b76fcabe2373a4fbdacfcc34d4934cd68bda1ef40dfca2efc09d. 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/TCAFL2139124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bd1dc8caeb9bf3a07929070c377582ccc7f66f7efbe5fea394ac954d0f5d49. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAFL2139144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896ad4feb5274b791fa719c9353d7ade3cd017b1901d01b133f1b285b4566001. 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/TCAFL2139131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb990363decb70379f75cc8920202be8e4133b868b7380f67b49a7b951de4f6a. 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/TCAFL2139171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea62f000217b55f01db5daa3097d5fb6e8f520464ff2296f235e037550202a39. 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/TCAFL2139180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981949df2e768f5a9555a2f29e972deab708644b5fe96b4ce13083cef4b1397c. 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/TCAFL2139164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5ecd4145c6e3224767baebf489d902bca7df78a29849b3f82637d6b9922dd6. 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/TCAFL2139139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4499318808e88fbd5e411a3e20d72398128aa837405defa9427ff867f9f9411b. 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/TCAFL2139176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55614110f6f7ff70a0f18c2915406cf313e50e4c5f52c897c80c03aeafdec18f. 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/TCAFL2139193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab0ea0270693052dbdcf56c6755a5de554560d42ceb3cd5379e4612dc3c5d86. 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/TCAFL2139169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8ee451b0de3872c36ee25bc340f3ca1ccf897a46ed85ff70b5ed7fd36804fa. 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/TCAFL2139184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026a56a714c196146aa6648cb10f3b9a039a39b0d307fe94ff697f213b651a4a. 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/TCAFL2139152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327d776d00e0ec0437f76738f32ec837640575d532160be3eb508cba307a49e5. 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/GB8KE2502057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb4a8661f9fcfcf36e613dd39d9fbf27bb571096bb57c025905b7aff462ec84. 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/GB8KE2502066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0295c5a39dce8e876f7180c758f149b0fc4b300a74fcca358d2f1bca56d22e08. 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/GB8KE2502061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf073f161629194bcb398bdd01051b590c33e00c55050e342b9d5eb14e5843a. 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/GB8KE2502065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5eef2375b36c4bab1fac0d4199c9a367bfeb416a57df234268c222bb41ba90. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GB8KE2502056.
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 0xa7538effcb764c7d9a0ea3d659e64c379d66a73ad9978e60283d8bcd749d490a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GB8KE2502058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5343c75b06edfd9c00b29d91112c7efddbb97efce3dfadd2c3492945e2d38810. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GB8KE2502059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831dedd1af5d1268115f5a1788003d959b0afc5ce21f8f56a6517decfd6dd48e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GB8KE2502060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab1d3858732d92ebb1d2c26c61955c8aca7ddbd558b646d6691966a6f44b68f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GB8KE2502062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab49266c4e86d612af951f5602725e561883614a6daf1878ba760ad1e911ac0e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GB8KE2502063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8a0895b1db21fe897ddc0a56ac028b4a9af4f95071c125f50f029bc0db697f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GB8KE2502064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1ccb45d92fcf73fa133512b9a02d4a5b1870668fc1cd60fd988019818373e0. 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/GB8KE2205702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9d0fb4400025d710cc0953d06db05a1913bc5899dde43d19793434924e20fe. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GB8KE2205691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cde499cfdb0314119dec0e891a44876a0c99131fe0b05ee012dddcf7aecb1c. 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/GB8KE2151785.