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 0x96206a78b01186e661893422263b9f7926ae45b3be9571883808ec0f7566c8e4. 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/02b0a9e1-f834-4e61-800b-14f75c41dbec.json and https://artists.proofprofile.net/proofs/artist/02b0a9e1-f834-4e61-800b-14f75c41dbec.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 0xb5d105d0886baa4e34a0cd5b48a354c881bd94c13bd7236b6c92ec4525e35d57. 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/QZ5AB1899536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4c8a48f57d466e7ddf8f2ef0f99442d52843d43741716c64829a86139af549. 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/QZ5AB1899546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b7c3bdf7e3db10a3e732be795289350ffc2be5920773d6c112a597e4f7680c. 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/QZ5AB1899548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe192f3d1b856976a2ea049981296266dccad92e6ffca5343c48ce8d3eb81e641. 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/TCACQ1616845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624f93edf2b3b55a5d874b7610a27809f478c6f746ac4b181e2548d0a55de4f1. 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/TCABX1459138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b33eed5290f91a1fc1dddbf157bfa606d765393b28bf831df89d6389e48fd5. 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/TCACB1472067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb80fda48e52ef8adb8c5e5ed355915821cbde6dd8f4d10e86106367771fcb7. 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/TCACG1558523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a4e4d568702796147d975d53fa995858554b6bda7b3679bf18a04ba4f71f1b. 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/TCACJ1590752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43f564ddb34933e7bb91775e028180cbb0e3e502c3abf7943a8e1b0fa44ddfa. 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/TCADC1708977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8934c90378fec83fc3b95bfb007e22871f45210a339d89ae51b0846c5a59f983. 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/TCADC1708978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3194653a0b6048450833b7eca08c2f5cdad27effa5c8323432288c42601fcd5. 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/TCAHJ2386058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a1e8f8d8d6003c460f60cc83a0b1cdfa1bb335ad69570872bbc1295aa994e3. 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/QZFYW2131731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74623092a906d1667ecc296b7fb5f69ac756e4a56d2eb4eb48b9a21696627349. 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/QZFYW2131732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b1db5cc973134cefbacbb4e296bf9f0f9ca1881a311e1de034269d750c5539. 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/QZFYW2131733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9a8c0b4c55e24ac7e58fc173113d3a3dbd4e210ab7c9cce61e42a64056739b. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZFYW2131734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e31f06c0d439cc5fb9323156afd0d82a75270ce374e44aa52aff9e4d13e8a5b. 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/USLZJ2031985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8f5e6a27607d2692eca7f27031bce09ca2f50886afaa8008d35ccc4edabce8. 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/USLZJ1983826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3141a53af71f0d615935a5f9934326243b8e05862bec1100e335d651b8507e7. 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/GBWUL2082319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b16a2b8c55407b3b46a0e009905662d5eddae02d1d924909b05cc937f4d7e1a. 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/USLZJ1989702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3a95d050a54c7e3b1a662d76857b1b419bfef1108363aff60ee3f2c91d3942. 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/GBWUL2082322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29f44b99bba87ea5cf456c1207716d9bed865e72ccd4e9203b6724cf93e882a. 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/GBWUL2003100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb2c6f43022b3c4ab6935f11218eb1f6d4d6ff1fb3566aa83a92161935103e1. 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/QMAAK1723930.