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 0x4588ac4ea24e99d18e4b986d15604fa60b16777969fc9ae9fd88f21ff0021f07. 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/5023dd58-e6e8-4df2-acca-d056730c652c.json and https://artists.proofprofile.net/proofs/artist/5023dd58-e6e8-4df2-acca-d056730c652c.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 0xe6d9da6770f088cd59e6d4d1ee5540f4efb838c3b00e886f1a6058387e8af83a. 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/QZES51932552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea997fefd170c4c1e1f41e412c96ee4f5ae7b22483b0e4db8d98a557f3899322. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFYX1936182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6253cc453333aa2072320a46b95e6829bdcc35aa4f5639cda78bf6001bf62fb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYZ2009216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145fe0bd96f6429a95647aad4941630f43307565676d8855a0a27813f43fbfa9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZK6M2074799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9798122e4b9db20adbbe234123dd73904ae34ff6a377c607ba10c90cc1f4e8. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZK6M2074800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a1b588129c4f4c15246b95a4953f5956124e8c1760339545eb72cd39a3ae83. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:33:28Z), 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/QZK6M2074802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaaf3cd5eff26738a77ee28aca481560c44ad48a615357db88a8a1c61691fa09. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:21:58Z), 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/QZK6J2104468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf30f91329ae3b9bc5c318f252d3cf48c3384333d85c6d3e2a8fff9c7d66c84b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:45:06Z), 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/QZNWU2175366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d70fdc315e39e0d5537b064a5e313b8659f90e5bc0a0835516b010fd9042619. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:22:46Z), 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/QZHNB2206329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758b01821465aa70e89e111761155bcac07a2669d69a5819884593681eb94e2a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:40Z), 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/QZHNB2206331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a0537b35ba11945e2d491ab63c103455c4840605f0c12a27c4c4ac36de793d. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:00Z), 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/QZES92308834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca4452f11a0447156b1efe81947bb48cea16fa0ea6b55cd76290ef346ee797b. 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/QZHNC2487447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781c57d99bca843ffd61506af95c9947a530a32dd1126185a47ab86d083c35bd. 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/QZTB32409700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a0c192f71490a533f5ed43e493d4643046ac47e7f4068e8fc89033fe7d24e0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES52520384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63902478c85d600ee577815ffdd6c7e572ca45a30626f55d7c8ff828a0099ed. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWX2576522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe721d64bb0711af336b9216306f9d40151ed3b5f69a05bca43816a319daa013. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT3F52535039.