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 0xa653c6b8226fddc5efb1c3d576fcd25d35e6c494cbf996ca00dad1f0fd7c5f85. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46fe37eb-a643-4a92-a331-fc2e53b4ca5d.json and https://artists.proofprofile.net/proofs/artist/46fe37eb-a643-4a92-a331-fc2e53b4ca5d.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 0x3252ccd662c0484420c6df2bee09fff483f3be1f61627e923f5890ee8829aad5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BK2242400361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde730ee2334325ffea9509f8ffc2cd0987cb2b1bdbdda037a04704d9ad3c303. 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/BC3PG2402290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c76acc2abeb3f77856d3a9519e87b1bce4cfb5fb6779474b9e06ea3485f09. 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/BC3PG2402795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ae1ea4ad575f6d5e345941280113f548c3903f8ef0c986a2cf5ba45bf959e6. 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/BCGQT2200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf828bf7f28d0c3885de87f1a1a44ca7899fa400aed4451b6e7c37704d4eca40. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZW9L2271513.
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 0x7ce6786e6bedacc93d0fe1b52f7eb51f9752f3d8cfc21a4d7e22f235e76094b7. 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/BC3PG2501090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5227b90f2c7b7c6006a061bf7a6885e5d909354bfbb5db553a6512cbb4b01d2f. 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/BC3PG2501006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a9257480ba9219cac1ebe4e5d0f056dfa79847f95bc9b2a5a00932a49d79d8. 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/BC3PG2500707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd39ff5f7049a428be8aa1bf9a224846453910229341b675331f6c4bb0bbac3. 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/BC3PG2500723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3007fa5fb4c777551dd76d658fa9a4952673035d0729328327320c594163083c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BC3PG2500721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76159e857bf94ebaf45287d67db8f8c3cfbf0f3f58e4c53d424f4cd2c0eac725. 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/BC3PG2500327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd367cb7b174af59e46b9a2f9a6a186542699aa60a44bd8f7edc225956f1d021. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BC3PG2500702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5810c885f6ebb8fd5cbf2ee72d4c23c9c71776b8bff703bf99c124779fb35fc. 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/BC3PG2500550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8e44a61d94cd5f35660cb030a7795ae4ced0444bf163ac5fef6f176a9d338d. 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/BC3PG2500265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94271010ce3774e42ec1e69a652a221eceb829d09acdbf23da94c18445838e87. 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/BC3PG2500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44712c5050f964250a5be9cf0f287dc4a548c3f363716c404f299e5f7e30d755. 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/BC3PG2500137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71839f4e446d9f2dee32cc52fcc4dfd34663f1e0b3bbec28681dc81050dc3a66. 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/BC3PG2404026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529f3805c179017e3a3fdbf539577c302c9c4e875c8a5066a9e11f6479c02f9b. 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/BC3PG2403544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3031c2a844640943b7d4ce6f741915b97e43b9752217ffd1e520f9f6bf889d17. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BK2242400746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d5394f0324450963d97701ff3de2eae668585f1aae1bf9be2f7107a66887e0. 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/BK2242400742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e440079b61d69e9648ff3689894c9c96e5bde3de61f56197ca773905e254d5. 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/BK2242400660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90356e6129120993e10862926669d8b8f3f09bca01a6e9613a9158720204f86. 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/BC3PG2401404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84bef1ee27edd265f221450531c182f20891355809d196bc11afc9286e355ec. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BC3PG2401037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17da0b5f731c85f361c2b18f80d22d22e678e535bd25f9969ecba78e42fcb99e. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZNJV2408881.