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 0xb72e82650313eb0c27ab77987e9e1dccf7ef525c6e7439d3e0908fc40d122bdc. 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/96009e31-932f-4c84-b10a-f94a78d75005.json and https://artists.proofprofile.net/proofs/artist/96009e31-932f-4c84-b10a-f94a78d75005.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 0x2b8a0abae9c094f2fee22b4610967b36c3ce62fa0de996e2cb8747e2239f43dd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:28:36Z), 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/QM6N21413750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16093d5ca5f68274fb20cd65a6298ccd2be25c863e4eb1b71e58341cc9185868. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SEVLW0701305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a54ee5dff1db94f6436cd1f82b00fffc2bed6f44800e21c29eb52e49050733. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/SEVLW0701404.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9b65a6f59147b74b0bb08802262ba70a2673e66e81224e48f299122925cb98. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:05Z), 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/SEVLW0701407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01f6c31b0cb548706e03881bb6818f1070281de8d72a1578e544141ba66d62f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SEVLI0810501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98adb605c20337a9e1fefe3fb13162cd23ac8a49183f41088a62858fbdd385e3. 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/SEVPA5003603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e3218ab55315060423f2303c219fd937299d9e1b336edf9f095bef9b881d66. 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/SEVPA5003606.