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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52c1362825b223201173c5354c6fe13ff0da921158a56165bf32e63610b7e1f. 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/196c9fbf-c393-4d2b-9138-186982921425.json and https://artists.proofprofile.net/proofs/artist/196c9fbf-c393-4d2b-9138-186982921425.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5763b0064da4070d4554d3290bb5204867143cedd9555e32aee49150e9952508. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCAAX1128052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2121203bb2227e495ec920fc529d057682a11bad19c7fe0e1894b6367a2c5b. 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/TCAAX1128051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a550b481177b3a85c564f9bc5e2031e80f51d2240276f0633d3a340b627cfd. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAAX1128093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9dcfe17ce2f32504a7e2b9781c1e2c8955b40cf09eea45c97f16b65d3f86cb. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCAAX1128042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26604ba12853b9038ca4fad3818b1ae047cc5c345f28b5e19fa48a937288bc7d. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAAX1128072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11003016b0c4e01cf04363b906e0fc2009d7e5ab231190bbc9a6c1038f58dba1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAAX1128043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71581de7d6bf1fd01d9efa3a47fd703626af30d215ea88ed8064baa8dd5da72. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAAX1128045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee1831161618c4aceb507cc4efc23d38b7314b0a922e2559f7026da4723c060. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCAAX1128044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb697a6cb5107c27181dfe8d3791f48a7f603f61008ca51d297ff36b876bcdb94. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAAX1128090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ed401e1112910c58cabd5cad1f967b4d77dc6930c57ae309efaa3b00ebb929. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAAX1128048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30ac26e912b8da44f4fc485f2fb47774df20a1042e300d4068184de587267c6. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TCAAX1128050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba74cac8af3338146086bfd74934f729fc1827a258b4c175ff27eb33d4f30f1. 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/TCAAX1128053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc03595f8a1a207d06cb45edd20ad27642f07c80eb01f5daa798c6a850c95eb. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/TCAAX1128055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eac641427af0af81aca24413b048fa9ae8815a6e60d928235b27d23f7b0438a. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/TCAAX1128057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57801a8f4125c60e0d5f87cac7ddaffe96625c67306d0171a95fe681f1d44342. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/TCAAX1128061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff73df1d688465d424c9e13ec6dcf85d96c43860883947271db9099eebf51a7. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TCAAX1128069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35468d686507edf7a34b5ef372fd6f4dbc42dfc4e4afb643e7f78d8c776f93fe. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAAX1128073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597e6afba149a26d1899428df65123a6fe542992f7cce2a9d9368c0a381704f2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAAX1128075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba26d52a0a999fd4be75f3128432bbe1791dc6a7b95a308beadf317dfa8fa66. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TCAAX1128077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f1dae88394ee6a3228d435a64a1a42212ffcdbb1013f5bbfb97e9262c57f00. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAAX1128078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ad1bfe7920dd7bc65a46d124458fd6c5a181b38466de9d90149509baf1a4ea. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAAX1128082.
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