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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468fb5ae9b459686ed05a75b22bdaa8dda20d46eeac54baa8bb3cd642a195e57. 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/70a54f73-ad4c-46a1-bc19-0d902e070332.json and https://artists.proofprofile.net/proofs/artist/70a54f73-ad4c-46a1-bc19-0d902e070332.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215e2d6477d99964ec365c23ba5e8c807ded5eb0c19ba4b5fb95fa95ee526dc3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEZC62575766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd618f9beee4e28d5544a71542cd2b507b6abf25ade73890de9c61531269ca5bb. 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/DEZC62411253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1819696609955aa6b2270127756e1951646a0433a04173792038caec5f9d83. 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/DEZC62402419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d42eebbf881ba3b9a8920e6fa30c8fa12cc9afa42f8160f5ef8b73eb878679. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEZC62493716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba5eb6150baa8d2c7fc49fa766c21d89efeb26e60745c82b3cbb14e5596fa83. 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/DEZC62497031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd705c0efb1833685682f0361a2a762eeacdf5389251852abcc534e1bac509314. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEKF22300776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39717b149877634fbe0b89fdb467a4b3cc6f303f8e23f79fae2d9d87dc981545. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22301363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5738e6c44ccb081528ff6fbaf5ec72a6355f9efe9230e029cf077235b782d5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22300655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215f8683e004f05d426932489c30e055e2e58cd7500ee24d75be791d03968da3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22300444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd705c0efb1833685682f0361a2a762eeacdf5389251852abcc534e1bac509314. 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/DEKF22300776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f0968f91c47f1876a3f89a5f713f6292635c8b2aea47910613b181781ca340. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22300553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3357289388947ec6bc9b473ab42cca77e54e36a74705e8322bb3dffb9195641c. 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/DEKF22301002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd815f052bc98ff2ba8338007f4ebca8b932b9b48393e761f308d65f599547406. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEKF22301364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411802a65b8376a6caaa30c2e95b3006981e730e8f201a08aafb49864a3a56cc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEKF22301271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5738e6c44ccb081528ff6fbaf5ec72a6355f9efe9230e029cf077235b782d5. 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/DEKF22300655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f0968f91c47f1876a3f89a5f713f6292635c8b2aea47910613b181781ca340. 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/DEKF22300553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215f8683e004f05d426932489c30e055e2e58cd7500ee24d75be791d03968da3. 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/DEKF22300444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd705c0efb1833685682f0361a2a762eeacdf5389251852abcc534e1bac509314. 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/DEKF22300776.