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 0x65ccd291b55230345ad7a5887397a25ad13158ee8a7864c032bf60badc9b5ccc. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74c4004a-a16b-4731-b62e-89a31f17b5fb.json and https://artists.proofprofile.net/proofs/artist/74c4004a-a16b-4731-b62e-89a31f17b5fb.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 0x1af4798ed28b7178c1062ce66aae3763b139a610160a71ec3dcae91cd0379bd6. 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/TR0280601012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b70f19e72bedaf5ebeec4a772f58d9b59a5ff61af248cc52c0d7c2b3a2b99. 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/TR0280601021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7d1f0077b104b2f2e25968cd61167f64a938d58594220f4bc961fc1291e7ed. 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/TR0280601016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394e542453435dc3419f6d368fe0f152abeae9957b97c28cee6ac82711708aeb. 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/TR0280601009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f63158ccdd96ffc31834c8487db4d0667f872ae8b59e211693414ae39e480e. 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/TR0280601015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91caac82dab5e4f2e17c56a6cf07043890bd21ed245e2aed57872ada8714c1b1. 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/TR0280601022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcf2992e3a070f528da8f283431dcb8672d4f9a5e77cf5cad888b6670835c2d. 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/TR0280601014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46e48fc65721a0c67465bffac3272e178d2cf6492e4b1eb6f5c785c509bd871. 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/TR0280601020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49adba2a0591797772eadc368664fba5f35f861eecc0a91d3ac8f6dc1daae578. 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/TR0280601013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde30ffbcc9526356e664c8fbc97bd0cf98d69d51d77963ff03d17582012f6dd2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TR0280601018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283ab642c6369503df9c9737175ac83b9731a84d5d381f849e66e1e77c2f40e2. 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/TR0080600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1aa66a2df7a01052bcc3f98c8c5e787b3a4476edcd1afbb822e091ee21243a. 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/TR0080600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c98688d019a24ad2da497a549f6f34bb3bc3be353ac2a9a29fb46ec391623a8. 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/TR0080600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee86a95c52681e84c4fe56165409f381e9a39d0435f0e35f8d7dc6deef1ea9a. 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/TR0080600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6f4dc8950f836604ac3097b94a4eee92b532ae5558d936aa6a8ede1b7f5323. 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/TR0080600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2176f146e95d487da7f60a4ecc82c353a00f6136b630650714c2bd9b46a85e62. 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/TR0080600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6934589af47f3ab99d83314d1636a4a292d5a5732f8289a52ce2ebc8bf842e98. 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/TR0080600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dea90276a95edc5f385535780b182ab4b37f689a3ed11d4070cfd6037522d8. 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/TR0080600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ee9d090f5970d140a512d08c672d1f61dfcdf47f728d3dda51f67c297220b7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR0080600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb0378fc7ab8e3453a52699b5cc233db453e3be3665d8216922af2b2ab60b5f. 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/TR0080600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efb650f6739f20662bbe4695a12299594ecb81bb5bdcbcf54bed3f3e43142e6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR0080600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4537eb9daf2f0ca7307f84997942b251880d65dcc888f40cdfad971f55707af. 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/TR0080600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954f030faa14b5e1b3ff0dee0099189e8adb3350748606ef8d76484b0f9c2e04. 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/TR0080600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ada0108371dd51ee265de493803263585a4143549c118ef0aa6b961d0a5419. 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/TR0080600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e9089499a251b7a981e0bbd8db9d44ac306db4c93c0683310eb5be197b36b9. 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/TR0080600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fb584b005fbd0821d1c59cfedcd51d40063ca8c36fa68f000d38db6f6fb09d. 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/TR0080600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92a3c1192d13d0b1bca46ab69f5b6be5dc98893b5279835d67be4b39567c35. 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/TR0080600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047b2028712fda5b5b777d0810ded89ce6fcbecef04aa57c432f6b0bbb6ca858. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TR0080600029.