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 0x6628a7203ab898cca44ce4e6d380b48119c41fa2abfdb4f43aefc14e2d5a9fd7. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e013323-9d15-4dd9-a563-964dc223be29.json and https://artists.proofprofile.net/proofs/artist/7e013323-9d15-4dd9-a563-964dc223be29.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 0xc45f0a313e9b0e778b9f3103515a7e894e362ff969a329a0eb8c1f4ba6c1d5a3. 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/CAVB51600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8da019b400066ed03b94323a6359f4093343c5cc60820e108f6c8d5508e49d. 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/CAVB51600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c54365c21d3dc60d0067c013a3044b13c6a0e93c818eb4793ead176d4993ea. 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/CAVB51600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953af1e703d8001e3f4684502a605e2033192a0bd35d67702087d0f7cb76e6bf. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CAVB51600001.
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 0x6e93d44842492b2bebe948ae1679096603f4b44203e7dbc4b2e62e18c01bf111. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CAVB51600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cdbbc025e93305f577761ae4e3a3990d4f6e22eb4b33402fef49e95cc027db. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CAVB51600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa757797d68773fc3ea34bd605b1b42dafe8d47005335d5657b4d24146411b7a8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CAVB51600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e95a2ea42a4b7f742ce69b34e69bbd7a37fce3ad62f3e74f998af65b650e1f. 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/CAVB51600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb7a81a9034cc5cb6cf2ae63e2fb1194d45df0075512f48cadc858c98f8f326. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CAVB51600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7199257be9ae35052b66bb065cbc299ac0ff80aab7161a111d9cc4d5df7d30af. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CAVB51600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2060c7e9a54f57cae668ebfac2dc052f0ad040ef691198d6c3d5946368374d5e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAVB51200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c253e03c72eaea5010e9aed8cf598995bec3c64b772baaf406bf454b32628e. 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/CAVB51200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f8781c1974d4fda6653e7205f4818bdcfef4876e9a3ceb954f31f3fafbe3b0. 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/CAVB51200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6cbaf00c8abb70794b48aa15bb2ae9551a4fb4cb641910a99ece4d754a48c8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CAVB51200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0fa6277def67e05897b37741b2f8e6632a997be23165477cf9544cae4a0ba4. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/CAVB51200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f8663f04cdb471af9d32a4b55f638e0b911046f414b3b40780de650a7db433. 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/CAVB51200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dc9855e89a6e67820a17c42fa20d07913294783e49ab8a1b2323a66a7be960. 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/CAVB51200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357f7dbc28204941fef4701b01e98eb51423b1c50feb8db77f85b4e91e6e1c1c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/CAVB51200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02de6fb03f6b0d6de7d55a95639d9c4ef2e9acd50cea9960f8849a91e04b45e9. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CAVB51200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655a4fc91559f5509f8e1bae759db67daa70ca28fbe3125e1be3c71fca997049. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CAVB51200007.