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 0xd8e2365e667e62fbff1978b018a50081f99a9f2e5c8c31b070ff33a791b71b3d. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/153e9a47-ef62-489b-b4ae-687f35985a44.json and https://artists.proofprofile.net/proofs/artist/153e9a47-ef62-489b-b4ae-687f35985a44.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 0xc619b46ed8fd6c09cf5ba6f0589b60ba056c7354e50aa406e09e32b6c456a2f6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHE2375159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded910f3e70e1d3dab1cedaa337c6880a9ee835dc488ad32f83c73ed6bb579f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIF2482286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8549aa36fbb929779dc0ba120087ce56a3f3fbf4143d304240f183e5379c3f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:47Z), 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/TCAJT2551877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9403e402145a0518db21f788065859bc2155902e36866afb914b0707dfcb51. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCAJS2551901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5a38feb89c8d37be8ce7e9d40d35e80419d5ddeaf1eac054b287c8e55723fa. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAJS2551920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12af8691f2cd1290383ef62f534162102396797c4df749db17cf883d899a252a. 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/TCAJS2551942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2559cf560f256c7e0635e51a98f24a38f9d070bf044a6deb976a8bc2229f525e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAJS2551957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01411f707ad2878283a5b72e2adaaf017fdabc86e94c76b2a54c9cd75e66cf0c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJS2551991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dac6ab5cfa749a21e5c43da43bcb2e7e6eda975202a5d753c5f9ce21faafa2. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCAJS2552131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4820652ab2e93cb616c06d4825f3f9bf77f416a046485fba96f633eecad0bc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJS2552145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9f26dfaf8befbcc1d06520e0cee13209f3ebc558db87ff8c603d69ca352c28. 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/TCAJT2552178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c24b2731c9fc1f297423fa71ea0855d1f0bb8b62bd8b3694ab6b55041279c5e. 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/TCAJT2552260.