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 0x682b694e5f415ee66dbc0a30cc2c2eb6037eaf3301fe5654621adfeaa066157b. 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/5b05cadc-b25f-408b-88f3-4d722bc60277.json and https://artists.proofprofile.net/proofs/artist/5b05cadc-b25f-408b-88f3-4d722bc60277.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 0x360596318fc484121ec1ed76d71b21a27df06889ae04bd6e944eaa5778d93bf2. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/US7VG1724189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc60afcad7f80183e0f6d1425e983a40cd73a7f6283dd9f705c3c0939026da25. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/US7VG1724191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fee2892691f1aae388b915c2f24c29bbb4479aa2b6c924fd0ce087f0a3c725. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZGLS1919623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbedb1d332c72eeb0c6cccddc00059ed1be2bebfece845967d2f553cdf9e0859. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ62212154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed25f49dead0b8c0097b9c2fb1226624526a7fa4ca3ed98bb940dbde65a8eafe. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:06:27Z), 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/QZW9L2227020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd9c1196bee31f75cf08c25042c18cb121d1a6be4ab8b04e0655f9560a4acbc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGLS2302158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9ba0e599ad77be65db13431dd5aa738210a1d1b146f521425639aa1cea4c4c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZGLM2419872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda047462aade3bb22a33d1b4dcd55436089c3cdf334624d11c1ab2d272398a66. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:59:46Z), 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/QZNJX2415913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed70e7aabe8f34cd6a22d5f4e2f30ddfb124d2a1441e91e224bfba7e844ab1a1. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZMZ92511643.