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 0x20571188e2b3207f7cbc7ae6844e0df0d34590ef46418280bf8a947130a9a20f. 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/21ed9f01-0661-4e2a-9318-8b2426ac8933.json and https://artists.proofprofile.net/proofs/artist/21ed9f01-0661-4e2a-9318-8b2426ac8933.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 0x1eba0aebcae0a8f0f768c3319f9fd7cd8e7632298b3ea10143984175ff76ee41. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN91970975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf833502c85ed573c87c2a80ba435b81a01483bf31e9535b14cbf3626fa896de8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN91970976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898631fce5a8f0080b91f94536b2931502e86dc2eaad4e21b7bc7ec83537f43b. 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/QZNMU2072799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617ba2f74e95aa4b34f8e03dee37b87459069890676066aa9c5a1d7925f861d8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNMU2072802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f78371d2bfb4c96ac09bb3440b7ddb5913ffc849c1053d8bc77802a621e8db. 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/QZNMU2072803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c7e25ea404f8db73123a38b299170913430f7d88e4e9ab03a584c5e0ff9b38. 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/QZNMU2072804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ab91380f6234d3125fc743d0bd0e1274909544a5f2e2e480e39d8e552e042c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNMU2072807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5b99354f487dfe4c06f3ad786624b72d1456425ef95be5cc3720546ff20c99. 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/QZNMU2072808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e7daedd0d9f5209e91d6d7e6b9411a605f49a77d6216ac1f0de20ddb344b57. 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/QZNMU2072810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae51fa283b6627e6eccabc3afb8cf344b961bf262a29d859d7efa952784128d. 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/QZNMU2072811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f22339a7dbfabfa4133094701449d5ed14597a17eade570ef0fa3784902706. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNMU2072813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551f09a3d1de778712cff16b5f08b4c00388bd2bb28249438eee6e1e88dc569e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNMU2072817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b9ae90d2f020cdc3a25a2c7a04be4555e7bd55989b1e734cdb55ff601ee4e5. 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/QZNMU2072819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0a8c64738f76d5a3d05dd88cc422ba88325132ea565c5912c3b24f9a303076. 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/QZNMU2072820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2f1cd396d7eb63890e8dc54576fa89eeae19f1ea7918febef3cd891b8d710c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZAKB2458313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff6d397eac97a4b41d35cb9ec2cbbb4b69aa8d2073c98f245e189e3985c0411. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZAKB2471937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e57923fe470e47b1e0f68b4d0fa574ccfc975959b76bebfa5e1ab7660555ee. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZAKB2471940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396e537b0c1833a00c980627ff7bdd6389b9d487368cfe62f0cff39aabf55e63. 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/QZNWV2294422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb537552e041da1f0191abd4f2990346d69f556a23d4e6891f041e4befd224779. 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/USUYG1552351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6742030d597aa1d110113135c79385612b2ef7270c7f7cfb2ae209c3811cc616. 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/QZAKB2453630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8898643287f17b7e11bd9a1c4d504159df16c846d688203247824c0fe9f539c9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZNWV2294420.
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