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 0x15b38f9f8e38ca9f2e3f59872790645ede4bf782ee2c26d830d3c12f18c33baa. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b310a06c-04a9-41a5-927f-fd9796e84be9.json and https://artists.proofprofile.net/proofs/artist/b310a06c-04a9-41a5-927f-fd9796e84be9.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 0x2a03c56102a27affadae23eb2573ab32e90095f553b256359530b49bf677b88e. 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/TLVEM2435660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c8282bb1dadee3865bd0565be0c51684ce7605dfdf98faf36a8e7e9422f717. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QT4K32573143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cd9426b26989ae75cd25224de70847bf9e52e723deb7b1dd3c5e1f98bfd7f4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US3DF2553270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d7c50e411a7e7b6c647114faa8ce7a1595562a0f4c0dedf3b9604e1adda2dc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US3DF2553287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f53030c1ec9570d11b913c5ebb9d92fd6d939710fabaaf387393f1cddcb8f50. 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/QZVEM2557753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817e5ecf869be478c27ea0f40669e651a021379b03af927327561080f2f602c7. 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/US3DF2536220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850d3ed1b60ccaf6f6025ef95ef80590cd3ed93ec2385fc34c0fbec7fe1681a7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZVEM2537422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf2e8f218b8195392db31fe03a80d629f2a1d0b5a8f4a0461486c6fefc0f875. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US3DF2524251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317a697fde0e868b0620bfb6810f7a9353af3d3e9d6f19ab3ac29fdc2bb613cb. 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/US3DF2521995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68839a73475ad8f3420775ab1f5cf30fa00b59ab6537a7fa8e4b2533619f6bcb. 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/NOPTR2504010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971e0ff46230ea0030f7607686ec1699511e7e98f6080e2429632d7e66e5c52f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QM3DF2417863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14109b7c44416885b612b313a69d02e88bed4f0927d980b6f3b2f4b6114892a. 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/USANG2472699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a20b5a04ac6cbab17e684fd8905a584aab1ce08e6e79cf15f9f6f0090e80522. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USANG2479265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1269207f1ec08c0cfbacf1be69b86c8b871b5f3d23bf0685d71d6a102974807d. 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/USANG2426234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b8b3a7da82cfe962ca68705d0f0abc65a496514053c4ccd182447baac2766e. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/US3DF2451076.