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 0x2a091c6381394405561a5360f0f51611e05322c79d2889b0dd0778f6bee63ba2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab745798-6870-493e-af75-7d8ddb9a4317.json and https://artists.proofprofile.net/proofs/artist/ab745798-6870-493e-af75-7d8ddb9a4317.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 0xd6314b9bd1c446dd370b868283bc54e1e7f340e36c986af73b6b4ef5b64af030. 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/PLC062234840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644d3292f6c1a2ea11586447865c545995a008c01214b5b8a510823862859b67. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PLC062239516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b821a5bab577e59415d1c93e247c6aba5929cf21e94bd2efeebce2c3182a90. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:49:00Z), 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/PLC062246813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeab37f2c2c3fce62f067ba024cf9702089e632a16397c3570b5f3b93dae477. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PLC062247496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c06e4bafba74754566ed0ec11e710d49390950365a4f66639f5de2531ec367. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:14:57Z), 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/PLC062248595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488a1733aa1b5a0085b6c38281ed19d2ae04899fa6ecb84660fc47c20579f28e. 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/PLC062363444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7756f59eb10c70e4d8f44e0f087f539fc534400a3368c5cfcba08ae51ebc77f. 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/PLC062367880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d1b80bf6e67dcd20b8ec195685746ee0d0ac912fc49291aa96b6e5cbe5dec6. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:24Z), 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/PLC062367881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fdecf8c416e97b408b9d163eecd59a29c13b3586002554db2c16625946cf0e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:41:12Z), 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/PLC062367883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0be09d37555282bfb38e7fac56c3b8cdbe3549d6e3dab5ded6b6cae009a465. 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/PLC062367884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeef96b08f86c4f859f7ea172ee99bd06f438205704778a89596b85e2c8b021f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLC062367885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8baa0dce8714a49b49c2f47e864a8846014d7ad45436f18ff4a6aa775d7f3b7. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:06:24Z), 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/PLC062367887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79bbb7bf0c0d779a139ff4f2f023375b412e67f8265df85bd6c14c9d00299f7. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/PLC062384751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e002f7d5c1414b87cd8617cdb102b446c9c85e2e2ae6e53bab404d99ec2b90. 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/PLC062393973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379a9a886b74af6af06aa538b0634d7b240ae8a84f0922311187ea3defcfc6d3. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/PLC062426062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f2a5127e4272014084e7a6293347f8f06e3819530ace78557d24e975fbc1a3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/PLC062426065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15316b17c65b942808360306f3368015332a665733478de505805d0a5f33f959. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:28:48Z), 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/PLC062424875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30583480b49c4e1da63788d29b2aa200807e04606d3564babb36574567cf2d1b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PLC062426063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2262dd817d739bcf244a7d298e6971e03827fd43e3b578cfd334df137a681f1e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLC062426066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67dad371f351a39ebc8c388682a5a892f5c661c172f9c8b7ac85601eb2d4217. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:30:17Z), 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/PLC062426067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574f682505d29e1279c1635767c98591d0d8c3045efa8a5fe8cfd0e0a87faa60. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:04Z), 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/PLC062426069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbfbfafca2e0832eba0c93c5d8a34b533c381608792c36c474d59168a045d22. 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/PLC062426070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a3b04f6917ef942cc80f726c1de303e7c52c5e4f3d5b3b01241a7dbabbbfba. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLC062386564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d90a4a4dff31ca9a45232c0eea2909b438744580abf42090023ea06f6691897. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLC062535217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14605066f290a1c10c8a3b6ed7a3326c2dfffd56489267a12adfa90ba6e61542. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/PLC062508966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30edd47d5f51f64baecb9f74c5115c77e64aff2802de2149ed26d36aad5e8144. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:54:39Z), 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/PLC062503889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0477ff0f3a8aba4f9517dd6986ceac6cee8b9f88d2a6c356b7f01803e99806. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:45:15Z), 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/PLC062520524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd8d4782925689853a6ac92c90dabdeeeff74075d6da773f012cc2c4e322104. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLC062541213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632b524a9876ac6b72f5643dde394ebfd3ec39f5e7c8d41c9eed430d0a021c4d. 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/PLA552300273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666cc9cb5abd7fefb6854a488abb1d7ec9748e42c542bb66d9cc1b4e819ab211. 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/PLC062406066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fd220124cdc759205babbe328c6fc7b1e5a65bc54bc227098b75d664300a67. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/PLC062410474.
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 0x0181583cfe1d380242cf9b680c2c90c013ab31c44e58f7d319dc67b507a98ad7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLUM72100879.