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 0x5245899e055b9ab08756e0b2f041a0284284383ca556a65c428d733680c6d461. 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/1822bb13-23a2-4603-9bca-b09c87dcc1ef.json and https://artists.proofprofile.net/proofs/artist/1822bb13-23a2-4603-9bca-b09c87dcc1ef.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 0x7ffad9c1f9684b5bf8a5c5215cae0663648e8a6a4d74b860b202b4a2ba2ee14a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEB1917018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4b89273813e9b2a62f2f62e185e0aba4311e6f34214eb756f7d77733ca6cde. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAEB1917031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8471234b3bdba72844ae3c1bf710efe5c1f0d2d7483ee2a4f009c1e718e861. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKQU1990590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a0e6eaa4cb3fd816efe6af36a721f742457204ff78370c05b1366199487f7e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBKQU1990598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3803251cc75e7722eb779042345112a644bc82ae054f46ecf90e104e59dc7d. 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/GBJX32006003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1751b6b731fda7fca058f02384da0f3cac1d119fbf33df8697e7be83d58cd7d. 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/GBJX32006004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd500c1eb8f3ca810d29818102356381945f2c9135a9313577e180eca7dc45c6e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNA2119229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87e88864144b7ea99e95c37aa1f79d6d8216f0a64d4fdbc16cfd26c953f8e28. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GBRKQ2324555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17c3f4c27602fb018a7225c3d4d4b4e48dee08844ec54a2afe281593127887b. 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/DEFB42400774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f691a1b090cc3bf11a53c7fbb08f64cae53d0ccfd1584962798116c254b520. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTV32569570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b1e94bb594a2d9e34ba582350606e080464842cdf70a6e6cd92c766591aafd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTV32569587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f691a1b090cc3bf11a53c7fbb08f64cae53d0ccfd1584962798116c254b520. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTV32569570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0772adcc574b88d151140367f3ecd5cf72c19d78617c89ed32d8c73ad610e8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWDD2598595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f2f0250244348034664ac95e9a07f028d491fb4b128a72ab796d4a6e56fc9c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZWDD2598598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba21abda4acfc95bd032deff7c8e3c86ace98d58d50b2fcbd58bda6d96e61d2. 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/CA5KR2298022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f7123e8c863a9423af8675b83c3f7f17e02e319e3f1011da7919897c70ec0f. 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/UK9AV2000125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ff89ccdeb761e9fcae52a7354d828d729d82e7c2e2b92c703ebc3396657b2a. 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/DEBY41200721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd500c1eb8f3ca810d29818102356381945f2c9135a9313577e180eca7dc45c6e. 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/QZHNA2119229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aefbeb8bb9ac2eb88866373ab4a2a5f0a999a4047b2acb3afc989f79b3ab25c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB5KW2305151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1c231e904452bac4a954f50e9e923987ef24cb6050ae763b35ec1520225aac. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/AUBEC2166937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17c3f4c27602fb018a7225c3d4d4b4e48dee08844ec54a2afe281593127887b. 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/DEFB42400774.