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 0x9cc0910625143cd75b1e70d8254539c31aa076dc3a4bf039126790f5bdad72d3. 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/bf9589ad-b066-4702-8c2a-66333942f981.json and https://artists.proofprofile.net/proofs/artist/bf9589ad-b066-4702-8c2a-66333942f981.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 0x815fbf34483037787b3f99528992840afb088f8d40344b95b93535dd50234c47. 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/NL4YD2100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe956172f75bca435f6ac1870adad5e6ac86f708351b0c9cd2adfb724ec59b692. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US3DF2207726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e0c0a17603746c6b985d70b941340171f40ce0c2afc48611907d9e0db5e219. 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/US3DF2207727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca739392cb92616a8f9c8dd947183d843424164e5b95a4ae246e5700c6ec2f1e. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/US3DF2207728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44627b6efbe2c9ae146929fa3661642ca23afc2a1a38766cee08a21977868680. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/US3DF2269634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3cddb5dc565651d36dc187f693214fe5b8cbc35346fb0ccf93efa66288b05e. 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/US3DF2257157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1db6e3fd5ab7519372fb5bbc6b993477ee040c683dcbbaaf0ce24e4e480d837. 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/NLX9G2200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f419735e7b6eb5ca6917e68839539ae5ff2eab7a65e774e09591e2805e0d88e. 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/USANG2242016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ae8442fc90286e42fe8fcf18c46035f55a7fcc67ec9a0d8b7e3a5c5968787a. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:38:15Z), 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/USANG2242017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1629327e51cb75ca32bc73185802e2cd76e4341ccaff454c4a0a30682719236a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USANG2242019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a26b112b038ced81df752d3129c13e44c78a86598fa2e6fb5fd47fd2ea52466. 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/QM3DF2217145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc84287ec64df89063af360e3c8809890f43f17c9fbd72c3646ea18ae180c7a. 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/QM3DF2217146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c7f1774cfe9e6497cda40dcdf22a98ed799cbe69f526bc817714224e11be29. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:01:58Z), 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/QM3DF2217144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dddb07c85b17d3eedf14074050ac3403095cde19c651ef0ba1202aa97a40fd5. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QM3DF2271073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e55f9a6093a19acd1cae9ebdc51ba5ad1223ecf22b33c5404ffb44864690d9f. 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/GBKQU2237581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10aedb25d552bd259c7f8c177522a0a3272845672010bb23b62b9f5a06dcee25. 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/NLT2H2400656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bc63cec018b64cf33f01fe7737468b42da79bca594536dc1d293345a0fbd95. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM3DF2201856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291ef4768bbd64091341d06fb5713db48bbfdc9449f4dc8bae9b200565a2b0f6. 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/QM3DF2298865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486d23451b827f68d1ee984a1cd4b61b0d3e8fd89ea8d91fde2bf96f816062a6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZN882247557.
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 0xd19dc48966b34ae3293f49d15a544251f28e31d91863e39f2551b998720aaeec. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZN882247552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8540e88c99d237a81830a678463cb580a5440a2927fa8f5f4ec6845377faa7a3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZN882184869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7f9fd0e9f521ab98784b1a1dffddb71eda85d82a49212a0cb53f24a71bc909. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/UKZGC2200805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c5b7e56858e2c6b52fd19c54cdcdb0c57b56c4e9e67dc10b49d12ce9e091e8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM3DF2298862.