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 0x0e034c973611ee771d23ac0167f9d72ce95acd46cb26ce0d0758220cac956e06. 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/b06ca64a-dbdd-41ab-b315-07229e3e8d32.json and https://artists.proofprofile.net/proofs/artist/b06ca64a-dbdd-41ab-b315-07229e3e8d32.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 0x34e2caf7b731000517ac59ca4bca426f06c06553b033fdad6e9f3ef6a4c63ea8. 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/QM4TW2326766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0eb631d5d51d47bdb8f7a4524a427ee96da3716069c58f879eb9726d63b9f8. 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/MXUM62300639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc169e102d61f492db543dd9c6927653de87370f6b11d8752471c339e55dfa15. 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/MXUM62400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b80a1ddd03928e5459fb3e438f9980b97325ab0a0e94882f732b103cffbef7. 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/MXUM62300463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c443534296ace7322006ae72a66aed85331394c93e3ac870b9d02b968bde33e. 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/MXUM62300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fe1e409e137956717632ab9fc1757b8defd4383319ed382560143e6f0067bd. 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/QZK6K2397856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8debfc8059aca4dbda2553a41c2b38429b813f35166875d66c2841a98bfec4d. 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/QZHN72365515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fc270256d9f9094900c27cc84e55545352bbe30ebf770db5516d8f4038e549. 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/QZTB42232519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2e2bbbd90c2375a64fd96c4763c45c2f4fdcc9bb4ae19d8e30061df6655262. 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/QZTAT2220243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd450d95af8a4c3d9801404a5cb65480f339c460af8d6b70fb19c5ffb1c267c. 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/QZNWU2283236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b24b6c7dba3a6e14d2039a84048f5a19e06c2444e29357d5f3f4b09736cd9c. 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/QZDA62296036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af76481aeef532b8c04133c404f15d4343eb508de3cd605896ccf62a210c602. 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/QZNWX2155810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02350b1352641dbc25216f9844a3ec47200465159ea5297c431a11b811acdc73. 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/QZES92189070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c90a6e73d0deed41b585d6e8a1f553ba496f4cd590a2b5b49c8fdf6b5b681c1. 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/QZNWR2099256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39b4177274c1727a584509176f34483b81416120390d142e66554ccf477c559. 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/QZHNA2048172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a78e05372b0c47f98ddf125a60c44e77527ceef94e7c064b816151b822051c. 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/QZES72002662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9abec0177936e5748cc057ed0b8eb1d35efa69a739715d5916b3f985b7885a7. 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/QZFYW2005506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08cb65767c8c0626bf4e6b93e8800b13f0cae00f44bb25c23d92df5014315d6. 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/QMFME2319838.