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 0x3f64e158b82999062fcc90874eac509d3e10a9013abfbd30680cf0216a5ce240. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba5c11f4-1d11-49e9-859b-13b33ed303d7.json and https://artists.proofprofile.net/proofs/artist/ba5c11f4-1d11-49e9-859b-13b33ed303d7.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 0xefb40ab5b24c037517ad265b017986720b75a3e918b1b854118ef0c3601ee65e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN82086007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2884daae9080d8996d39b1f0b0e6f865d9abfbed41839e717a465d13f0833613. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ22166211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2e7e3d0632d0a4a87fdf44817b657e1d2524ccee1e4ba283ef2b9b029884a9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZNWS2125227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda36f51b7e7a111f5bcd6b7a5b74f6462590826c6b7009b8c5710ba11270332. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T00:59:18Z), 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/QZNWZ2174583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2107538804600dbb39dc1e9debce3b794c67e9ba80d3647fde1d3ce439f52e2. 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/QZTAU2148940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa23238474ae5014df1beaf3a8dbf693ebb2fadeeea064cd2fd716cb1917a99. 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/QZTAU2148941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90375ae9c2e9da29a061f3081ae9ec1692c8f798c5d01c8a031039365abd6c24. 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/QZTAU2148943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f35734cec66ea2f7b19f7b5b3a09302a74c1ede8ebe776c7ba7a53af51f2aa6. 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/QZTAU2148944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb9769b3a601a26bc835b47a81d771ef1afe834533b52b9924e9c204fc9a351. 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/QZTAU2148945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca2191f1fe78b7b3cddc7c23c43966263ab6cba213cf49110b17a62c8d46cac. 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/QZTAU2148946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4c09806ca34c0fd69276b83cd3d31f7749795d6884fa7ed31ab8e46d0df205. 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/QZTAU2148947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3045f9191134551085cb34eda75187e81018bf4dd8762c6ac390d16c9384ee. 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/QZTAU2148949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793314eb90d46f31f6b7d3530fc4c74b4d1f3e00d1cc39b91ee3d45b0fd320ac. 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/QZTAU2148951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17dde6ca20603ece3eb5d08e69290b28fa258cda1cc884ea1802fde9afe1f0f. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZTAU2148942.
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 0xcc47a41d44ef39f56f81779855771686720bd65c212bcac39a4d540a11e2660c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTAU2148948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929ff827c60204f23d62fc94cdbed292fc406d7a9b93ae298747678082a240c0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTAU2148950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb75ceffcf18a0178923ce200c03bc89de5b77045fbfcd1fc034d42c644fdb9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6Q2268754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382702ab9f079a5e8e046cdcdf9207f0ac1c505ab8871aa9049d8f7a0f1d8571. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZMEM2296683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8089d0102f4e661b12d71b2344832a5d0391cb3b3942339ef9af077b88e1fdc. 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/US3DF2239873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b6b2db2a028dcc818e8db7ece857bd6dae687e1fbeec583f7864208c58addf. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZQMB2101483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b3f1a80b2436df27a4447a3ec644d4ce4d5e2d95e8268671da144ec0e21575. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZHN72214328.