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 0xb66aedb9ae2775e24041b611e3613090281d7831d49189029e49a3f710c95f93. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3dea310-4f5a-4077-8ddb-8d4064ae1684.json and https://artists.proofprofile.net/proofs/artist/c3dea310-4f5a-4077-8ddb-8d4064ae1684.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 0x8f9e26317b104665c140191889407e2f508eab61ce1cb3cf6176ccfd4bbdc64e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ZAA169400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbd83526140a5fd22b04797578bd788fe1f21b7d65deb17ce35832f0cf74d75. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZAA169400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333e0c7877df33ddc0de818ad046c03dd55bea90cd8ca93b72572a66fcd24738. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/ZAA169400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a4be7bf9410259ccbaeb074f9a0c6199220c2fe1741f8677a833b8fd575f28. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ZAA169400265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ddb2cfb7bb1155250bb48517e0b0e6cc8f0c9564ea087b27fb48b292065bd3. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ZAA169700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdfa3939a140fbbda6c8052c503422b7dc4aa5eebeb265bd9aeba1d837a5bb2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZAA169700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46badd13b54705928acd9f8a3a0a38f08c990f69e1b7289517e56c0ae63977e2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:55:14Z), 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/ZAA169700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0393b2c434f368d58e8ba1e420658db88621ff9f2c98e12b8ac0436447a052a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/ZAA169700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1955b7d8ae9e0d591cc50aa5143e6e789308aac47a61607a9108f8aa3f3e3163. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/ZAA169700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cbcd00670281dab2e422cc891612870c782372a940634d02361417112e347b. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/ZAA169700212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2024bb11a656b491dbfeb7d414f634004cae73cdc6b110de3e098007b4f6bda9. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ZAA169700213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee01c198c1fbf93a1556072b50ed1096fbf2db183bc37e75860865b9cc569cd3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ZAA169700214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b07d95b71fa76290eac9f203d4c84190ab9e07f61dbfcd036727e62dff6370b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:42:31Z), 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/ZAA169800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c85b5629f586ec6ea1a28894b20f9b479de89e78978a191297e9e9e3f32b660. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ZAA169900267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd71580290c1220b8885b17a4b282f8ca1661bdc74ef1713009c43a56b981b93. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZAA169900268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4048078c93f91fab140195fed60c713b38b0981c4c37b4716613304b4170634c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:24:29Z), 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/ZAA169900269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9877e37de374cfe4049cf94e84596fb2591a6d4ba4db3ba7667214854de80f62. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:55:26Z), 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/ZAA169900273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb83a1583ff160f10ad516ffc83e77474936826d7a20c5da79e87aa2e45af46. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/ZAA160000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d563f72ac38b0054b8d664688acda091fb1fea3bc9e517bce18197df27e6b6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZAA160100442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed7b51a3346a0bac6b6d4dd3eafaff14ec1634f2540f686fa22f197e6071f9e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:27Z), 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/ZAA160100448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61058519beb0e0b40beb90b8f92567633bd06187cc4b7fd99e4451cc1a4246b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ZAA160100449.