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 0xfbc1afe6b76b1c8a8a17b43b6c9b18df99e40824ae9540038a8f1d2e22c61b73. 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/172592b0-6a93-4acb-95a8-0f031f714daa.json and https://artists.proofprofile.net/proofs/artist/172592b0-6a93-4acb-95a8-0f031f714daa.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 0x5f029640fcf68f0042d4573270454941c8897f1f3810ca545bc09a736a30628d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBKPL1794995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f029640fcf68f0042d4573270454941c8897f1f3810ca545bc09a736a30628d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBKPL1794995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f99d68d6053b3e2061285145750ba571ddbd4918c167f0ee7bad5f51319e7fe. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBKPL1816313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae13608db9f9d554048e59607f474c710fa071e5214c02e7bd375844b29cb7d4. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/PT1HM1901002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2f32259fc416877a58ccd3029890430ed2a894c62c472420e2038af5338c14. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/PT1HM1901003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1a48f5db11eb5d93f46335284d67dfd45929c13f13fd8eb7922190f5183a81. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/PT1HM1901005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed3d1c73f257f478c6a467d6d186280b2c3db071fddcd6b176d4fe01565b03e. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:38:46Z), 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/PT1HM1901006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c770f7d3976c0a51a55d2c81c659daadf9c2e661ca6574d9e92e16c98cd1d5. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/PT1HM1901007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffa52dc13f9042891281ae48547afb265b18bda5da4cba000a5e34a09b7e730. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/PT1HM1901009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cde98476eb21fd100f7742ac5e72f0563485918610351ea5da23caac6b84ecf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PT1HM1901011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e792fa5787b88bc1cb22435f3ceb30a1444d90e4e50bc5540f8fdcbc61f7cc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PT1HM1901012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb0cb5ca6742dd7f6d76000db90b25b989b718dca8e7dae1138fa088e7945fb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PT1HM1901001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae13608db9f9d554048e59607f474c710fa071e5214c02e7bd375844b29cb7d4. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PT1HM1901002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2f32259fc416877a58ccd3029890430ed2a894c62c472420e2038af5338c14. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/PT1HM1901003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1a48f5db11eb5d93f46335284d67dfd45929c13f13fd8eb7922190f5183a81. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:30:52Z), 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/PT1HM1901005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c770f7d3976c0a51a55d2c81c659daadf9c2e661ca6574d9e92e16c98cd1d5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:41Z), 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/PT1HM1901007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffa52dc13f9042891281ae48547afb265b18bda5da4cba000a5e34a09b7e730. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PT1HM1901009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cde98476eb21fd100f7742ac5e72f0563485918610351ea5da23caac6b84ecf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PT1HM1901011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e792fa5787b88bc1cb22435f3ceb30a1444d90e4e50bc5540f8fdcbc61f7cc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PT1HM1901012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4fb24a94f9a9b80799a855edf87da98444e8f6240b994ea3cdeb1a6199d53e. 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/PTMD10404820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d889100a700ffbb81ebda12c041fa387ab75a3a3d9b50c2341733bf17f589e. 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/PTNS11200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9de87dde02d6c38bb3e2125b422f7011793603bd5d7438c6894fbeca2d3076c. 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/PT3KV2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d889100a700ffbb81ebda12c041fa387ab75a3a3d9b50c2341733bf17f589e. 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/PTNS11200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d889100a700ffbb81ebda12c041fa387ab75a3a3d9b50c2341733bf17f589e. 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/PTNS11200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66053ca11ee67d23bdbf55f50a7ad3460ff210f67bf4cc88d7df654874ff99a3. 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/BX3IH1800009.
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