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 0xc52c1362825b223201173c5354c6fe13ff0da921158a56165bf32e63610b7e1f. 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/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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5763b0064da4070d4554d3290bb5204867143cedd9555e32aee49150e9952508. 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/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 958690 (2026-07-19T07:14:39Z), 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 958203 (2026-07-15T23:59:32Z), 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 0xb697a6cb5107c27181dfe8d3791f48a7f603f61008ca51d297ff36b876bcdb94. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/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 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 0x35468d686507edf7a34b5ef372fd6f4dbc42dfc4e4afb643e7f78d8c776f93fe. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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 958544 (2026-07-18T12:14:37Z), 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/TCAAX1128075.
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 958734 (2026-07-19T12:54:58Z), 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/TCAAX1128082.
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