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 0xc0fea0b3214d387f0d1bfd46f5066852f5b3cc398f0d96c5ccffe4c5a8c6304a. 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/99f3a231-00e7-4f2a-afa9-33037cd24ffc.json and https://artists.proofprofile.net/proofs/artist/99f3a231-00e7-4f2a-afa9-33037cd24ffc.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 0x47483d62118e7dd67cb28370568fd6e4e330779395f1deb87ab697e184f06133. 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/USCGH1564599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00438a93f35384cef432592776e3bc2744e0d88c8aa6ae94b6d6d1977ddb83af. 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/USCGH1564600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02112258940baf11e1141c79b941c50e65e988602b7dfb0aecf18684860f2d8d. 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/USCGH1564601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b75702fd20bb87ff3d76fd7ac4940c93f50d8dc7e52717865d25e2f88848f8. 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/USCGH1564602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2808e2c6123c24bb1532030c16055e45a31050e343b3aaa290392116ab45776. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGH1564603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0949cfcc08a2d4e3c03e5dd9024db2ca9ab614f552c68eae614dfafadf90e4e. 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/USCGH1564605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bce02145736b6615037887fe9731a68f530cb3363e41d72cc23ecc49ea3bff. 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/USCGH1564606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafa510e71922af4bfec13f6a9f063d26376462031d96a7ca287c0a035d80089. 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/USCGH1564607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcef2e4501a83f20b5c950c5d656ac549f17b4ea1866141ae69765ff1781fcfe. 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/USCGH1564608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec8025158ad8de5399eb9bcb353c8bbf02063e9089bc2154a198ac86e97db52. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH1564609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6049aba9ff29e37ea56127a924ff9c2a68c9ef4b1fe10ad82f4cf3a41451f3. 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/USCGH1564610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5703590f977d321c763fa3a1213c1f11c612d311e725a0ddc7928a71f088aa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGH1564611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d8b49cb62cbf8840fd37aae16647df91c8dcc06c37e4ec30479a13e851c27a. 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/USCGH1564614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6049aba9ff29e37ea56127a924ff9c2a68c9ef4b1fe10ad82f4cf3a41451f3. 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/USCGH1564610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985a33e1d0bc937f84af60323225beaeacab56e58ac577dfd49a16b2436eede0. 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/USHM21230547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252b6ff9833003f62169202b15b907f84f6c7e02e120e21f0ebdbee4dab7c776. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM21230534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00438a93f35384cef432592776e3bc2744e0d88c8aa6ae94b6d6d1977ddb83af. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH1564600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0949cfcc08a2d4e3c03e5dd9024db2ca9ab614f552c68eae614dfafadf90e4e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH1564605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17d17ef2c96f02d269d87cc55b2a744edc101a1f465ae193fe59cef964b173c. 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/GBWUL2108060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec7da36bc6e1fffc79743536fd34ea490fc4200eb8a0f14bb28aa77b9738dbc. 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/QZZ8B2311128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cc42b170780798b20dd1370ca6f6ff3d05634afa1b9509155d98df9396ce48. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USDY41853745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35e1ca1a8fe4fdabf0e3a0eff5f3a91bd890e44999e79807f41aa50f1711aaf. 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/USHM81301705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e17f054affbc97590c596f889917cb352a9b290d85e1ad149b6dcb0c97cb6e6. 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/GBWUL2108062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd43cd42bcc1b3e9af267e41ff1cb56c601d26287d926e4f7a05c00606bddbc. 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/USCGH1564612.