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 0xacc728e66718133bfb018a5517bb3359f1f336a43ad97ecda80cc7fdf4d4c3b2. 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/1f1a379d-c086-4338-b3ab-55441c10be88.json and https://artists.proofprofile.net/proofs/artist/1f1a379d-c086-4338-b3ab-55441c10be88.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 0x80107a40cc1e7979a5c11b388d1582b6ce48936bc68519679ead2d110fd11ce4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:19:52Z), 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/QZFZ72119478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3be4630579aa0322924fbf453e91d91dfa48379b3e3a631e64959fbb324e95. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWQ2362694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade93d72f94e543c8979821821c72294fdadffd1adb3634d479fdc27d51e2130. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB72365000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec705a997c8c4c60d9a300cd0aa474c72211ada7c9af05c4c22b506c0b25c80d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFQ2370531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640b4e97e89e389211bde2007741a35f088b0c2e6546fd4c216b5331069b7a78. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZFYZ2520498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf055136b37a9cb4c39112063e18a2858d06d8b79384c4f77823ed691a8ef8e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZFZ22545325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d8c2aa9d48695f5bdda721d189bf87835385c10fa2a15053fb629ba4699f2c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:47:12Z), 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/QZFZ32502464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c255e0728c8cb464d04c4b946edb71175effc75c7391302621a4bb9d765bf9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ32501009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a951ed9c1fe3f85c9bc3f4b0db1ddc1b465ea218965196b39b0102620636686. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZFZ32589141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4687dd68639129beae7a2f203ae3b053c4a2a3319595e257b0db7c6b9c482cf4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:31:38Z), 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/QZFZ42575899.