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 0xfe7777a70522074fb4c9db3acbf4c76e8705826170d7e6747f45117ce7085e16. 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/76d9114d-12d8-4a31-a899-6b7c361a85c2.json and https://artists.proofprofile.net/proofs/artist/76d9114d-12d8-4a31-a899-6b7c361a85c2.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 0x85e8e792c82f069f37662b419467a992cc9016e021d05cfe438e5d680cccf07f. 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/US7VG2490569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c72b1aad2861c2046177524f1c312308b0a3f4601c072933e4e151a58d1f7c. 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/QM4TW2490283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee00d491c903e6c860acbc9231152379e52b9faae35aefa7dffa2eb5c0a07115. 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/QM4TW2490287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c90e021e623ac879242827ef987b063e8f3536c994fa8d88f218745f50b6a5b. 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/QM4TW2485524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726679c73fda534d1b67caef0c19004e95273348858584b2114141b60234fcbf. 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/QM4TW2490355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212b7fe656b7e3357f0719eaede67ae0874de19433575c5659501176ea822c5d. 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/QZW9M2218351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bcd4c24c4d20e424524bd3ccf77a16d9e8a3995a12f72ff3988e4a5a48634d. 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/QM6P42425725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587090bf964d4d1fc2feadb5bfdc70fd65d4245ad9ab8202c6327e433869af92. 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/QM6P42420751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb093cbaf95f63ff97d951e89556014730acc00fa1715d903a13ad54a9485599e. 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/QM6MZ2487204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ddd6b40a8a357361ed9a29a11b99ac8826c602172592087ab0e6ef92d980cd. 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/QZMZ92406568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f421afc058c63c392c70745de847794f8a117d2610c3e8b904a6f3f6d4b0a9. 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/QM4TX2496223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aef5523a69d28ee29a4ba8c2253528dadefd204a3650f763d6347dab845225. 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/QZW9L2316237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef908f9d3d88969d43ead587ea75b14e19c42f284e6eca78cdaa294eb0f578ed. 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/QZW9K2388562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09459edd6671131104f92df3c5cab55a9dccca0d1400d72627bab0f7dfabfd56. 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/QZGLS2343241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212b7fe656b7e3357f0719eaede67ae0874de19433575c5659501176ea822c5d. 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/QZW9M2218351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d47addbfc40172c93c5506c93299bc5a7bdedca33f608e904adb51ff4b5b17. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2526522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd101f0a4ad8fd46355295da6aef366a23ba3e1c591da46ca0241a3a9d19035. 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/QMFME2479704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aeb82ea5b4bd2481be840184d122e97eb4d4ca7c48634e1beb9ce9d92ffbb7. 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/QMDA62438443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae971afc98686598baef89d7d3a230e91f129d6ea3a3df1348818b60512ad045. 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/QM4TW2498867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f74e0ce8ebca5c2522147e94844bbdb0b53b3ca0e304a935ce2ffc6ff45f8c. 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/QM4TW2498888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e939d827d9b26276da6a7b70038f8a06f726c6562ba0a23c38fa5523804a9ef. 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/QM4TW2498893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a6abcb1aa2a5b7922a1e689f0dc56067a5b20c5bce77c8fe3b989a61571cfb. 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/US7VG2414080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fabf11e71ebc36b2488492b8a199ebcf015eb48927d5b983d9e4cd7158162db. 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/QM4TW2498903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab02a2e911c4dca6d4f396765b7c72606e3f48c79c364bc666799ecb4e3c0fe. 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/QM4TW2498894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5a71777217b4bee8ec9e0aec269efb87efb7d0d121c5510aff6a73a4d36cdd. 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/QM4TW2498891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931df2bc94020aa0210a173bcde9fe8ec0d4424ff2a1db482af94fb0632b8dc1. 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/QM4TW2498892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc409c3200517675f870b2016011cfd2fedc90c0612f6a1b81f627de992154368. 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/QM4TW2447267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89ef7c23c261d9f239c8b68687c5914354e9e88040e6dd3ebbbe9ba89fefaca. 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/QM4TW2498904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6c5ba9a2165e6d3c4be46786f3311661633888e44cd4f4f46789a7687503dc. 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/QM4TW2498899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf196e1f98e4a71dc68be372a7afb98d9a0a30e1dc22824d07fc4001ce3eac5bd. 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/QZ5AB2446941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f72ac45a5d4f88057d7649a0e8b727f37a35dbe91de2ed1b59f34ade44b27e. 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/QZW9K2394941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfaa4026f44339608707ed5f526db6bfbb84743b2de2b999e77184d0d04445b. 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/QZ5AB2446943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa792be72007c15613d81f2a1f6326f67046a2fe1808e8be6686da8cb43c8aa25. 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/ES71G2502490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7ffe24ac5ffda9b001a621bd448f5e0fd332559f49810566f89eaf4f68c37c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES71G2502488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7a882fb14e06c406a2189e42935515409d3ac196e0db2e5220a827f51fc86f. 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/ES71G2502487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa979ddca92a9ee9c90f2f5ffd0c96e6db8315915793dbdb46f603c4403b9dda2. 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/ES71G2502489.