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 0x2f4f9dc1cb203914cc7bae4f45906113512f191686b3b89ceb886013a9ace9c1. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fa1bf00-3348-4435-98cd-acb335b83f41.json and https://artists.proofprofile.net/proofs/artist/8fa1bf00-3348-4435-98cd-acb335b83f41.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 0x6a81636a98dff030fcd0e4363289906d9cbbe2bf18f5bc6586d594d92eabed6d. 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/ES6062180101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cc05a4ace2ba31401c1420250ca72080e9ce6720d37aa92c2989feca92501e. 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/ES6062284501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdd6a7bb5c11349acb0961ed023ac8a3735dd9f36faa72b0b8ebe9f90c494ef. 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/ES6062293403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26f2bf7f85d7ae4233f72ea82ea3f188bbb4fc609e4ba20bcc80567b3fd73b2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES6062181601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ca8ab2326749421d5cc63d978dd9666a498b3af8ec39e3b8d7a580994834db. 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/ES6062292801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f0c85b3ed991a3b297e9c6551cf4a33e5015c49037fccc336b22ad32a1d2c9. 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/ES6062293410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3444fba8fe6945b6d925a41e67744dbc354cd43cd46e74c1e4710747f491d9. 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/ES6062062601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f99285f91b085bc89bab489d06a6f23ea2fa34d049a65565bd6bde2603d694. 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/ES6062062604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a888aed5fb322a8028670d51ef0846e2274b2cdf5824e5dadf15f319527f6e. 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/ESA011890012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0765afe409f91559e131c7baa1fe922eba60c6df78a52423907f2aafa5853f0. 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/ESA011890013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e17ebe272a8be9d944c6e2fed2d5a838d7c4e0d68684f356bd11855724728aa. 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/ESA011890016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52145e1e289f72d5ef2746bd3212802fa9ff3b94e9143687d57cdd50714b6f4b. 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/ESA011890019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ca8ab2326749421d5cc63d978dd9666a498b3af8ec39e3b8d7a580994834db. 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/ES6062292801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a81636a98dff030fcd0e4363289906d9cbbe2bf18f5bc6586d594d92eabed6d. 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/ES6062180101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73d6efb4a29f109b3dedc8e94c8a19b6c622b30901be333e72c715f01badd01. 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/ES6061962001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf963fed7b778aedb88fc839cac5767b3576b9d66f940206815d4314315ac940. 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/ES6061956404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec30b2b8c9db72c4f004c3ca4a8f91a8b40e44dd7bf2673504e875600abafe72. 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/ES6062395001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c20593c6c8aa3570d875e9681417b88f3407e602e2c555bb12f7a05822d063. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ES6062283501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec003077c1cf53e77471f29fe8a64da336df91e1dcd42d9d5b068a8b35ed722. 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/ES6062178205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28401a9b8d64e91b3476a4efe55f46ef39562f604ab1f39998b64d5f20049a3a. 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/ES6061846101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3444fba8fe6945b6d925a41e67744dbc354cd43cd46e74c1e4710747f491d9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES6062062601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f99285f91b085bc89bab489d06a6f23ea2fa34d049a65565bd6bde2603d694. 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/ES6062062604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0765afe409f91559e131c7baa1fe922eba60c6df78a52423907f2aafa5853f0. 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/ESA011890013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1651e31718f995ef0a37c8f82f49eca24123ffdebd6b07087635c4adffce4d2b. 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/QMBZ92501848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4150100676436bd0db3c5c7dc57964abe49c660b5cbc358ffdb9a0d5354074b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6P42584296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13013ede13e4e11b6e75390f9cc3f7787168b02949d1e17ed0ac4fb8e6e144c8. 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/ES71G2510911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4150100676436bd0db3c5c7dc57964abe49c660b5cbc358ffdb9a0d5354074b2. 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/QM6P42584296.