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 0x978b462d48534d9f3f5f7492f8011f3b2f8eedb6d6daf365c8b7f029a3af5a4a. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58e56993-0e8c-48b8-ae7c-87e4a7bd9f2c.json and https://artists.proofprofile.net/proofs/artist/58e56993-0e8c-48b8-ae7c-87e4a7bd9f2c.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 0x9361adf16ef1fd5a844cda946f55e95945f745ca67f4fa893f0a9d7b3f92d419. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SGA510905401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce31b099499943ae609289a2f3fb81a86f8dd6da42603d438bb369203f41c72c. 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/SGA510905402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a70204645803995f8b985d4d3ca8d449b46a2433786c026518ae7e1e7a48dfa. 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/SGA510905403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f69356cdd3b9f05eea5c5193d0cc31efcab252947dd8863878ac48efb372db. 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/SGA510905404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48a5863f7189c41a2f26b19510b0e3a9ec90788a567ea4d2f7cefc288417920. 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/SGA510905409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcb8d8c46ba551b3040c19b989afd68899313c6066064c359467337c99b14f4. 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/GX38U2384962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78433afd2ecae8a9e6d053cdbc40c942aaad88b77f760d588ec32f1770a0c8f. 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/GX38U2318964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6a86b39dffe96ccc6bd1f62d678936a0a2d5c34d7114303d27d5a7562c47a6. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GX38U2391764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970b9cd74d5dc2004ea9f0ccb95bd4c161a0a2e7a807d9d25cb2451564998c35. 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/GX38U2344952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3be82e57861dd031c58158f8ba57f1f52c3c09a6d77d8827c90c0c6edd20b8. 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/GX38U2357059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b79c389a9bb13ecb73b21868626191fcab919e083137e1a5dae2e2a5233060. 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/GX38U2361586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275ff93f37e830cb0c4637fc115fdccd5d9e6b03e36cea510319642b21fbd636. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GX38U2326763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ed418479352c1df60394562e80136d61497c8f05df8d45b0da70a3b1f94231. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GX38U2380032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65f802c0e0ead31782a51c4ef01f132c0bcad45b31605590250978aed8b4802. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GX38U2384259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a8da395b4bc9a99dab2164dc76d670544af7fe6194b47a09a0edfebac3f085. 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/GX38U2325056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bee4a353023e018e10af14a6ff75c05da573d406d8ad99e26d48c93aa72eaca. 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/GX38U2368115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c6223c06c91385f491bfd9d620edf2c67f9ab876aa1236be5a14cc196617d9. 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/GX38U2360006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8895353652eb50c48f160b345fdc27c6bb927adf3782b090ad0473f8000944. 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/GX38U2315428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc307f90e4ab6910275d6b87f9497a53e633069ce7aff9a1fa7b32e3f9244b98. 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/GX38U2388802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d3d7c6ff3fbc57e7f4edc5d70736928ec1d7030cf5a4071b44ec9fb48c98fa. 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/GX38U2356786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771f803e0f48a1a20dc24d5f1e43b0512a014969d5aa85f3ae1b6c8d6c185aa1. 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/GX38U2348310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56254409bc159f01533f2a7c481f6bb654df0d2f82545df3953893592a9135fa. 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/GX38U2349226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227cc5cf755efb50ed13e9945dfa5528c731080182a7ec3033027ed2b2025f38. 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/GX38U2333831.