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 0x346071d2f24ae1063dcdb83b8cf7df9905a49dc70d7757a73dceaa1ffcde971e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/670393c6-a394-4e86-8080-3e75e942c508.json and https://artists.proofprofile.net/proofs/artist/670393c6-a394-4e86-8080-3e75e942c508.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 0xec62f22197829cf2574e9fdddb733a48da7c0de555982cd6dc51e29b37147814. 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/QZTB42325402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b92e471c3f51e8464396fa06de241775caa56118de8008e562581b2637ef604. 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/QZFYW2160209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9467df16d7f2508d18a4974f611df19e05f9b1dacd3fe5530fa2ee0c79040f. 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/QZFYW2160212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71840ab8a6172f0d22f426ef8ab58da97c9b6705c3f920fbcbc21e99bfdcd75. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZWFE2396429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e07b3923e5d9a2fdf96288202417478eb23b0ba8252e4028a894183338563. 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/QZK6J2395898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d303d8d048cbbabe3ba2ca63936e2f98c6194d03f0e4f5016ba354f12e43032. 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/QZHN72313522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1293d886802a183dd948f23eab5c92a686d258cea300aaf1a92959bb99b7c528. 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/QZES72339821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e75cebf82d3190c2f65449e0ad3172a27913988ec7260256e7202bd5c73b12. 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/QZFYY2323582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0004a75f8dcb50c8b1fc0c38189b1412428dbb85c9af6953feb7b3e3941885f. 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/QZK6P2206034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a6a731f93857644174fbf520db741f0ce5037db6c219560437f4774824e94f. 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/QZES92269196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3262a5fe65fc642a4dbcce97b152b78884795b3efcb9e9798f9c7eb4fb45584a. 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/QZMEP2137991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2418b62d2ed10cca48b873f7b9e5cfbf8d4401cd85407274e6c4a74aff45eed2. 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/QZK6K2164300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ee2720a51c2fea3b2e18121846a5dc615c4cc7f9b1ee1828e9de3cafa6363a. 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/QZK6Q2188472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dec018168a2655ae576d70e7a627dd1cb1a428ef81be41c990443a78df4161. 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/QZHN52458314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9ceb215c6d2273a6c0536d48108bda3559a25d3242ec631eb8703e5bb5bb78. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM42K2184090.