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 0xa37033707134cdb2441d425b6c2c011d153cb183b3bd2180cee2f3274c085e56. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68f4c4f8-2011-4954-b807-66ef5f93765d.json and https://artists.proofprofile.net/proofs/artist/68f4c4f8-2011-4954-b807-66ef5f93765d.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 0x022ec93132122098487c8086ec0c54da1ac7f277b09708f8f9f5438748bc8f91. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/DED711200334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0996f974991ba6d96906f12f01cf6799ecadd73c889788487fc76a57b57741b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:50:29Z), 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/DEK601734020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc60ee5590d77e91eef904824471da783e616900ce07e8f9e08ab593ec4570b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:38:44Z), 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/HUAED1800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8693b7cccc0c7ea52684083fb92f06033f9719d24302e75a098475a3fb9ba3. 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/ITTQF1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e348f4f6358ff79dd405edc142c980c0524c958786f5169d367f25643fc8aff. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ITTQF1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e1d1a6c489d553fb6d629539b87c611d1796c40ca976c2c86e3100d4695f7a. 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/UKGGD0600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9d23b9bc85835bb2e917acf43e993cbbfc0435adc0eb7ea95718ac8568b8ed. 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/DEPU61805304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99253ea362847aba7ee4df713b866608ae08c61b7d946d923d7b161df7bda668. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEPU61805905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f5ee5d12ab86c56f1bd0bf3b9211c91062579de146b8f1f7bfbd8c6933513. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:08:51Z), 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/DEPU61805906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba44116f11e3639bbc252d4b0e6217039fed8a3fb12e45176f3ed5348fd81a8. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:20:21Z), 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/GBKQU2316619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e548229f32cd5f2730c058adb4b05507aff429ed3e036543ae85183ffd1ee92. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USYLM2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10036042a5cbe80cfd77d6f483e69752b9f2f3fde22336c28407a8897f60edeb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2366987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c8a7780912265f606c2f654a5995ab6c79e880404ae099b83a4b06fcb3f31a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:55:17Z), 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/DED712400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8db6169646932653646437c0097e859d9b504c69184330e52603637d330dbc3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:40:36Z), 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/DED712400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f1f61ecf5d304275745b0ed13c4e60ce550d9b10e1a53cd0f7e5ce3a8791e1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2P2444137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac22e064c89c8e515b84a4dc87540bfd4c343dbafdf26fad1f3b139a3c18178e. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:08:03Z), 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/USA2P2444820.