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 0x15893e04d62b4e05e7949cf1e3a4e80589e3ba14e6004eb26bd12ef47b50246a. 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/c67d8475-23d9-40bc-ad0b-b8549bdb24ba.json and https://artists.proofprofile.net/proofs/artist/c67d8475-23d9-40bc-ad0b-b8549bdb24ba.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 0x14a41a8d924fb2564da961a33a208d7a83fab596554dfd1841a97fc6e2c1e981. 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/USYBL2301303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b46c1660eb2cbd5608135c6de0dbea82bb06d195052704714bfcbf7cfc776d. 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/USYBL2301304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1734b2e402052474149e207409b05903063a91675e68fcf9d127626ba373f984. 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/USYBL2301305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99692b993f4493430edc483c8a26d22173d4778ad0ff275e60cf843b72cf91f4. 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/USYBL2301306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5749f20f16c8f3215b5ad85add83e52fc308d27ccd220b3962c3fab758e8ec. 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/USYBL2301307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56891614e92a4f10a6af3dd19127430a147d2c0b1df3ad4232c206754d988de8. 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/USYBL2301308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef240e4544459ed48769b96849e716a1a161770403455e64b0bce0c7031a1b66. 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/USYBL1501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb181c5da55d8f1541c794d8e8d0bd0ad47c594d77412b48f11ade4653c9f6f0c. 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/USYBL1501011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae5cc35c7aa6606837195a1b16b90ee0426deb593a0cd3ec4356ee726c0131d. 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/USYBL1501012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7288e04fd2a0f09774a0f63a0d2a95d6ebe2a72e1ec535124d7fefc2a29dcd90. 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/USYBL1501013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c143815f201b8d21766da9c325f4cdaaa18062a1454ae10c5b1105f48d6499. 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/USYBL1501014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad137eb3ff05494d4de30c3575e752bc9fca9132f9d4d25a6285e33318810d9. 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/USYBL1501015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8ff78e340a392683b1bfcafaaa3cb3e88778c8fbe001e3580ac087b17e9dec. 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/USYBL1501016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1434f53ea991928be3e83f267aff70580cd1fb042e8dc443e13bba4d32be3ee7. 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/USYBL1500267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3cce47bce70a38e38435e80f4d9338a4bb10b45697788bac7c96cf1da7c30e. 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/USYBL1500268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aadcc63c0071a5314014d8162c79c2f670b376f2476d5d5108f070820b805d7. 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/USYBL1500269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacea32ed183f76a77a99eee9cc4938e75f3cd0ba6557bc7e5cdd43d0231c9b85. 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/USYBL1500270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ab672a3611e4bd0cdb4bf5537a35ff700660b2139df12a8f93c16286cc1d3. 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/USYBL1500271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3ffaa6f3bcc25cf1b0167f01d947a7d12bac9a8c61a7e12f81437a960e961f. 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/USYBL1500272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9922f0c46668bf61aabd083ffc9438e63696a3c389f319e5a7dca849d2af2149. 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/USYBL1500273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1314692f1dc35f3e28771fca83aec2c6318b5c83347637c1fea665703228211. 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/USA2B1019101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9c533143e3b94a908af174c57d1044f24d5d4a659f0f22431b874d0dc53371. 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/USA2B1019102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac79e0713f9ab33648b384e45040b9b8a48fd7019edf2324ee1f62acbdc041b9. 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/USA2B1019103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11015aaca46ccc72a2c3b13f7ab3a55ab67171fd4d4f52703e947e264b690691. 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/USA2B1019104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b21ac424bf809f680458dc9b48f57991d094db9c80f30a09d0fb8b61ce3a3dc. 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/USA2B1019105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd433cbdeb6100d79b3d515bb7e98fbe1ee8e1c9aa8161ad2c49f448becc775ae. 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/USA2B1019106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2874c09bd50492d74fdbf3ae20a605c09ab4d29e57fef747e2f4fcd1ebd851. 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/USA2B1019107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa05035c8a92fde71c7edd7a33acdf4317c8c801ad137f3f7358f0de4ffa7bb3. 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/USA2B1019108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf1cc087610a5f3869c2efd31186d4aa29c17e04e6867cc3aa6d166b8638447. 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/USA2B1019109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b6da02074f88b7a4272b2e70ec70e257674fb5684f4577dd89ac7f4b5a2be0. 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/USA2B1019110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3ebc376a2a3522abe6ecb76db2a5f0d5d0bdc6a70eaa3be6b715a8acd62530. 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/USA2B1019111.