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 0x29396382efd5e803e92858ac2cfa7859c245a9b7dbb35629737d8d0777d104e7. 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/d17362b5-0618-491b-8f64-cda3bc2ce66b.json and https://artists.proofprofile.net/proofs/artist/d17362b5-0618-491b-8f64-cda3bc2ce66b.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 0x95eb13ddc5953aaa77cd45b473d88c1c28f58aeb88bd5cd3b9f1cc26be4cec3c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZ4JJ1781342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fd634deb7da1f76366af53124ac12232a40d07fa17237c71f13619db459705. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZ9Y21736487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb789b715b63dc2b5a092eebd5de727707078110fa0a1aa41c28770149b42afb2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:03:53Z), 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/QZBRF1842743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a308fb6d75d81e55d5db9ce0b6284b42014b9d24378f5ad74e4393db8d27d0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4DW1893035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e31dcafd8e0cd0525840309da920bdc14dadd7382266047122b6d6b962b1cac. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:32:21Z), 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/QZB4J1859214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1127ab56350da9e740674ae5c65eb5db63629a9c20d4860447a63dfb65e3c8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:21Z), 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/QZES61952425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88923aa473194e2dc24265853304b3a1916fd9f40b1a91c4f0e7500d9435fa1. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QMDA62276945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690e09eeb4bc1cd0c69121f5cd9ad613e68655cb59165d812bab6ca66c43679f. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QM6N22438758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f81c58048e990baa2b9e94a5ed7bd2b1fe2a78f25b658d50b93818112697d9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:09:57Z), 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/QM6N22438756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ca49cf64991be64ffad8170a836adef3934a860134a31be758ea6c61fc01bb. 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/QM6N22438757.