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 0x0bf2635f01da60be6e631c643ba86a718857517c95fa8049eb37681afd2de6db. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f8b9072-8fd9-4d17-932f-1c89abf1aba6.json and https://artists.proofprofile.net/proofs/artist/6f8b9072-8fd9-4d17-932f-1c89abf1aba6.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 0xbe9a3613e2406de5fc9b92e3e5bb6a815128b99d91a4e651694f3659a36f86e9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRS182013703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212c556fb331afd832e9b73e56fc68c39d9978dded5534f49a9a13505da9bcd9. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:45:05Z), 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/DGA052073224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc63f208eadff2a3f3134a1e8b23e0e67d7d60465d2c4b2d80a10686bce35e9d. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/DGA072168238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c1a4359432caf55ea42217bca01661dd14ae934dbf89809903514381f8eb9a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FRX872188420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3510ef75be1065fd71d9b92d7d8020f2cbaec00a95acf8c94584306630dbdd4d. 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/FR96X2221169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507685f7122242c337d13d78c3dfd47df7e03c8e72350109ce565bc37c4d6afd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:20:08Z), 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/DGA052251679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a3a1e645c339d63b5c635dee2663df729bc7a48b3d01ee585aa0258b9d4fc8. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:28:51Z), 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/INS182202193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6172f31b7f74153474d7a6776418d2ce54c5d355cebd1353e100b96668347bd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:24Z), 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/FRX282421358.