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 0xc86c50355dbc1658f9a5314143422b2cd73f4d11edda602b291011cf7acbac32. 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/92e0ba88-518f-4c83-b882-99936ebc60db.json and https://artists.proofprofile.net/proofs/artist/92e0ba88-518f-4c83-b882-99936ebc60db.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 0x7739f3867f95e348027baa9642b51f268505682a3563caeba83452a3c13ee590. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QMXHA1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a3b8210eec764af65ee9683c022b49a05d399ed3c644307a31f0accc30a0de. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QMXHA1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30451a85639c6527c3e4053d5eb529fe7ca6bc0a20dbef7544bb4ae938cfc1cf. 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/QMXHA1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48898def2f063a4515b956a5cb581cae2d636df77a50d91881a0e2e04ffbedb5. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/QMXHA1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdc7147b5641e632b094f001a9c92cef07f163a0547b17e870f65acee04e331. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QMXHA1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0fa4077656f5b7efcf1c61b125431f177fa61afb8298b1d7f2f7148cbed7fc. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QMXHA1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd975b6f1656a0479cec9c6f23dedd5fe7c9ff072953e963f94b5d13fb5415d2d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMXHA1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3c30fec44461e08e629b39d735b3ca8f472f16b13de34b6f76dee22f764e39. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMXHA1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82c2cd8cd8e476d29d14228bd894d80139f1c4d6ed73d170c13af434ebeb0e1. 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/QMXHA1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716f5da64e6f9f5df5ec5daf624d68cdf951fd1a132b8850f6658f06ac58e8e5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMXHA1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cc553ecb6129cacbc5a7ad24909937476234c95af4de25f6e46a61f20ea43c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QMXHA1100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c85538f49740e6aa9c3b527e7e059ed7387223799384f0424a75f0728fb459. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMXHA1100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21174343295d403f6fdfa8c1d22630e6c5299317f2af56d68dfd87c06d4b9d81. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QMXHA1100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76a173d01ba659bf7cf5ca29816caf1ec0de3bc909b06bf7ac8e476b3af8115. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QMXHA1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4076041f50a79e86e3a6b051578d78cd1d4b23dc84550d07b342c0fe0f5d0725. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QMXHA1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8a016a559827d3b23df51380e57a30a97f786191d740dbf78f972ffd26ef4a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMXHA1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b429c28efb2e18377552d6f69febd7f690446b3b7d7b07592af266d1628148. 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/QMXHA1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159cb159bccabcbf4c75cd73a7f95319ee4e416449bd4e80c2367dfa1e276a36. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMXHA1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301fdfb85238c0d5790f89d453ba261f6ab2eb6958dec5487f7a93c2b5b25f6a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMXHA1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69332ebc3b7d6118b536c9c005b5a9bcc45a3d1a03176b9e379a91eda32d6a6a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMXHA1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8897c9bd3e6d43bfb9bb45e8712243be756dfda3c9e096e38705b3faf2f7de2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QMXHA1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e65476e391015386caa846e73f8c3fad15ddc435979e8e526970965a58bd06a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QMXHA1500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc0358fee44ebded3dd72b1c95754f7251c58ca0c268a624f208210395e488b. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QMXHA1100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a227c8565591a99255f0933ee2d294627b3ea4af8d674d796aac08962c95a06. 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/QMXHA1100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5dcf28b850d9568008793f803a47497ce99518cfdcdc83b7ad2435af472de4. 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/QMXHA1100032.