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 0xae2ac81bde757353c2a05c2fc648ca4ef0978281b91f77c0883fd08e8285a574. Chain 2 (Bitcoin): anchored in block 954020 (2026-06-16T23:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/378a1a96-3db3-4f89-afba-d8aa4d7ac705.json and https://artists.proofprofile.net/proofs/artist/378a1a96-3db3-4f89-afba-d8aa4d7ac705.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 0x085950d957a0f7248348cde65dcee688e86dc732d4612e9cf46f4481b132ce5b. 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/US3DF2273001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1e0e802894383f7e5fd96981282e2d6ed94c0e5f79f46314b303c6b10e34db. 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/US3DF2273002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00898e8962fa08b580ba5003bd66003814285eb78f1574965856d6d65b51d84c. 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/US3DF2273003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3010aa86ed67fb4f75edbb008ce92727ea95f50cffdc6fb306876116820a2aee. 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/US3DF2273014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0474d0fc214945b7d1248b454e4cb5b76e5b260279443676d3931460466a01a. 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/US3DF2256187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31753bb085db794c57a6c55e1d6bae55c3766230aff2a34fea95fe3826ad548. 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/US3DF2273006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007a30463b93dac2e902a3f7aba9ce2c129f8c1d12895bb8ccd876ce61dbfec8. 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/US3DF2273007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ed462df7e4ea970811df1171fcdaa09407579b4933fcdffdc825200403c987. 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/US3DF2273008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54007b8e64159801914a7e2534fc17d8c110e9817c18432f87b4a5aa7e2da977. 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/US3DF2273009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54ff8f79ff232a092f0f5539fb10c27c58d123e159375d8139565b66c535b20. 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/US3DF2273010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b73920e16e0cf67b33cd5ee2f6b61bfea03073dbcf389cb768d0cf28de820b2. 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/US3DF2273011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6182c113166d115624cd2ec4315524897eacddb6814eadb14cf089636b1e5380. 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/US3DF2241307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2207abb2e1b04198b750b434252e96a2c5da6d4341eba945f6fa39852cf832f. 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/US3DF2234182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643df2cb1102425bce06c81ddccb2cc86c01fa57293aa1ea312ddb9eb19bf011. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZDQH2386385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4095b12fe946ae488f30c59e18a29340b8074a8e09fe6598082b293c0491d33f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZDQH2375134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77edeb5c0bf207c445ba0ef3ba4113b12342807bd96464f791fb8ac0b1b33b7. 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/USDY42355480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d2eded198a682b9dfd3e5794ce7a8b487e2eda7d6c129941b55cdbaa8445fa. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USL4R2227213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf396dcd790d6bf8b103ecee44eccc07eaa276740b8b87ec4cf1dbff89c0c39. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USHM91902060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a1a3cf75c0cd9efd474312054ae8fd057325cb6037878317485327b897923b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZDQH2397938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c5f29423e9c8a38e113744e954152496c37e54f6543174e403e178be96dffe. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDQH2395630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930920e91fca161803279472a6f8afed41a7c2cede922ced0e18853d36c7b441. 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/USUYG1706222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea6ccc9396c6535e9aebcd3cc103fc9e245cde53dac80734d9999773788b098. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USUYG1700995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84230b9c8c8aa10882efdaaa38da3a4027d83e36f64ee03336e828b7e70fd9b. 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/QZDQH2500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b6a3a15d9fd57c738a9a00224b2e68c6b527769f6cf877d24036484b4340d7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZDQH2500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d1f008b8bb80232294715efc888b05dfeb0b589b04bf932138194e8c6627a4. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZDQH2500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b7ac35e6d1c0e9dd997a3dc456a04102a5476735d0c585a13946f1f99b4138. 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/QZDQH2500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9382b9e29d66443fbec1ad763e3d720a98547c5d1e1a94791c1d2931c909059. 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/QZDQH2500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc020e191f6f2a5fc265e5bc70aed299a2666fd28af79bfc9d9fe7abfc6ec056f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZDQH2500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78035b1dd7195b39c257aefd919ed7244a360282782722788623b6d69f3b4fa. 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/USUYG1743443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ca838d0c8d1fc5164b61ab2388c01633de8d4e3405371b5508d2ef6d8cac75. 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/USUYG1732607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b548d1ab258da221103afcb1a24d916aa6ef98aae8f4bf241bb87c693ea873e. 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/USUYG1724963.