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 0xedd05e22e594659f59d4197aaa66164f41dc59e34c7c0fa8d69eaaa6d2f8a068. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82101bb4-27c5-4598-a97c-bb6a05a1db97.json and https://artists.proofprofile.net/proofs/artist/82101bb4-27c5-4598-a97c-bb6a05a1db97.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 0x8124c6f7da8c55e7040ce99b54f2066f9222d28209de725a5bb6fd71edf90c14. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKLFO2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0f974fb884a2b6d522668760e88478df461684e1cfe152e3479af996d3aaad. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKLFO2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55335f9bfc8d8a7d1cd2d8f72c052df886d57f8a8d684c3be96a62ff9799136. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKLFO2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5c59322427f50118b35ca0a6816f1a21cb86b830c20a670cbc97c7dce32cda. 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/BKLFO2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd327d9403797236f11fd13167ed6ea1dde572ff0f8b55c0ab4e21b0cfd2dd6f2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BKLFO2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd327d9403797236f11fd13167ed6ea1dde572ff0f8b55c0ab4e21b0cfd2dd6f2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKLFO2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5c59322427f50118b35ca0a6816f1a21cb86b830c20a670cbc97c7dce32cda. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKLFO2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5c59322427f50118b35ca0a6816f1a21cb86b830c20a670cbc97c7dce32cda. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKLFO2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8124c6f7da8c55e7040ce99b54f2066f9222d28209de725a5bb6fd71edf90c14. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BKLFO2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0f974fb884a2b6d522668760e88478df461684e1cfe152e3479af996d3aaad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKLFO2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0f974fb884a2b6d522668760e88478df461684e1cfe152e3479af996d3aaad. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BKLFO2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0f974fb884a2b6d522668760e88478df461684e1cfe152e3479af996d3aaad. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKLFO2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8124c6f7da8c55e7040ce99b54f2066f9222d28209de725a5bb6fd71edf90c14. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKLFO2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8124c6f7da8c55e7040ce99b54f2066f9222d28209de725a5bb6fd71edf90c14. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKLFO2400022.