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 0xe7f30563a86fbcbd284f35b60249931316496b4bebcdebe14527d233d4a6cf6c. 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/351a7f46-2efa-41b2-82ce-6aea648f1842.json and https://artists.proofprofile.net/proofs/artist/351a7f46-2efa-41b2-82ce-6aea648f1842.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 0x4f1c178ffaa6e964a06761418ef73b3fd7b7001ecab25ef76c8077bb2f28836a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN92364051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb27c4e4c0695f0f27a72ffbd16426eed525bc9cff081176ab2f3b6f7958e33f. 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/QZNJY2349484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62231150925790e08815747f306811fc1252483ecda18c99c0c6204d533136ba. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:04:02Z), 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/QZNJZ2397440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b763b1cdd4c150deee27d39adc486e21f6f836b92822c6b6973bd38e53a2ed6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZTVM2353595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc758f3a62563dc4805f32679750372f30562736331d7a1e0b8e1bf62fb9ef26. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:41Z), 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/QZTVM2353596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62231150925790e08815747f306811fc1252483ecda18c99c0c6204d533136ba. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJZ2397440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0bd38f74b229296ea390ded14d2cc18621094c005993de469b711eb323b659. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTVM2353597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb27c4e4c0695f0f27a72ffbd16426eed525bc9cff081176ab2f3b6f7958e33f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJY2349484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51868fed2277c95b3e140fe468084d62bdeb4db6e9c9865538b173629f79d6ef. 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/QZ5AB2489394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc094b35e33bf7441fbc27c417d1da6851e4c8494d2de94086eef66aff9abba7f. 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/QZGLS2499622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f720bdb94f5a9b0673f6c20c097c14ace4ca7fa6face27e92f3a0ecbe2dfc9. 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/QZMZ92441947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc094b35e33bf7441fbc27c417d1da6851e4c8494d2de94086eef66aff9abba7f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZGLS2499622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51868fed2277c95b3e140fe468084d62bdeb4db6e9c9865538b173629f79d6ef. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZ5AB2489394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1438c223b047dd4e63d72a42b93b8915468b22f942fd35f01b2c92f9da5808f. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:42:55Z), 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/QZMZ92441949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c00e9d235cb2093fc00187cfa3e19dcc933330dcf4c848f2f7340d6d8aebed1. 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/QZGLM2587926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c00e9d235cb2093fc00187cfa3e19dcc933330dcf4c848f2f7340d6d8aebed1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZGLM2587926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf498876a423b8e77ae3073e9f0a2c26c61901d70ab4934aeed3c500cb12a19f. 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/QZMZ92579648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c00e9d235cb2093fc00187cfa3e19dcc933330dcf4c848f2f7340d6d8aebed1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLM2587926.