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 0xc38b9fb5cbc2a95404e1e64054403f9cb8df5fb3757d76e0a228b263473f5516. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca28c652-3ece-4ea9-8de4-0ae5b272647b.json and https://artists.proofprofile.net/proofs/artist/ca28c652-3ece-4ea9-8de4-0ae5b272647b.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 0xf3751b1f2af475b92254e4e1446f948280b03ff96ebc858ec3338f6d28e0a4ed. 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/QZK6K2269574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1b9dd9769b279994f8c74cdc2e17d6b90790db24af29452905f9adb7cebd21. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:03:36Z), 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/QZPLS2242301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf091bdc3e6e107f8dc49069f21b0a9dd73fa1e8b00e2a9539fccab44f23fe9b. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZPLS2242344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ec3f94a7ffe57f8ccfe760f5ba7249a586fe6bd092816099a5aa0138282b1a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZMEP2494609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9792bfd3bfbe616a4b238fe91325d64945998d3b599859f286eb67d06b8e8f10. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:07Z), 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/QZDA62572340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9999f04f0a5237a692a023c4bd7031d48bde1d3e613bccf6e7c9c74d740f00. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:30:34Z), 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/QZDA62572353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e8293d1d5df8c2af08a2847fe210e14899ed8a728dc36553c9e945441ce3ef. 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/QZMEQ2573765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ed8f1456774c01ff53d8d22f9d6b5ceb73397b6953d93a6cf3a401810487e5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3F32504503.