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 0x1242b1ffa815c29cb052857a8eb5fe1d8d370f4bcb1cdbee71ef0836a1922804. 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/cf4807d5-d926-4085-b0e3-fb2106eb2698.json and https://artists.proofprofile.net/proofs/artist/cf4807d5-d926-4085-b0e3-fb2106eb2698.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 0x5188c6302925e01f70bb0f7d4b57b51691b2ef90e54c20ab5623da7f9b3b5f9a. 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/ITWPX2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0eb06081e5c281896c792d922ebc6718c1049e9cf5fd344387f1c05d3b457b. 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/ITWPX2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82cff08788ff47478009df9ee669f2251286205747022cc01ea653f901fe98f. 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/ITWPX2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc190aa3806a7c4d37bcd7bc465a8178e3f6cfa9ba678b8d3715c3278ef4788. 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/ITWPX2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061b02d0f924a92b77fe5287e5eefb3a3a149dbead2238464d6824c80f699642. 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/ITWPX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba0b24a032ae9d33ee94ddc076e10d02adcb53e39d6b39ab7c21f013e46f260. 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/ITWPX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f688f797ca16c13d637208f3a39d13cb1a172e68a678c19ac7662a4e066450. 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/ITWPX2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125a1c721a495d11c0d0b61ba1d63c8ad45cfc51bf6b1ca00964d71bdbaacc74. 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/ITWPX2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7863b53e2cbced8723028b18e3e6208bfbc0ec067568312ffd43994a36fd8ec. 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/ITT371800726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf79e9c79293652eab6bd9e43910a5a3308922e5adf9c94ce71ab9e203fee22c. 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/ITT371800728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330c26d3b68562c5ac629e4dc14f2564b3b7464bf7b38d3e24c7fcf51bb9d4d3. 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/ITT371800729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c78acb34a60fdc6360ed87a330db1bf5a51524605d0657973b5a4aba7f1bee4. 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/ITT371800730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c9f45b371f2848b1236d67762687057c7f0db73780b7e14cf3b1e11f71363b. 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/ITT371800731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c65d91e8a779d6d20e426889f3be11ef3a71216293bd8cb6781b438677ebb6. 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/ITT371800732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3733e98f9cfa8deb0ce44b3bd39b193ea1efd452e1805ed59936e1c8303299cf. 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/ITT371800736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521137b4aeb65cce9091707b94a86b5d56194804b68ed400449d6565cc8182ed. 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/ITT371800734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7721c6b280926c5137edaae2eeeb07975c554b2048e00b39da4bc310c050ea. 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/ITWPX2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0362b87322801f0cf6aa9e253a8d27a1ca9f229353822ff4665c2152994b9bb. 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/ITWPX2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82cff08788ff47478009df9ee669f2251286205747022cc01ea653f901fe98f. 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/ITWPX2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0eb06081e5c281896c792d922ebc6718c1049e9cf5fd344387f1c05d3b457b. 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/ITWPX2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c62d493470b29e43d8c452b0f76bdd5cfbce96d8306636f2198f15c1aad21bd. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ITT371900828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc058cf9b340711521d766f809b062c04adc6efe38f861ffbfef1d26668a460f4. 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/ITT371900807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035be9fb9867f05eceefddcd27c6a569b5d80219126c34a22e3ec54eede1a7ee. 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/ITT371900774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb17414be806df5a94bef151a890476d5995ab1d89c5b6a19253c9bf7a886b3. 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/ITT371900772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3733e98f9cfa8deb0ce44b3bd39b193ea1efd452e1805ed59936e1c8303299cf. 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/ITT371800736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c78acb34a60fdc6360ed87a330db1bf5a51524605d0657973b5a4aba7f1bee4. 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/ITT371800730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7863b53e2cbced8723028b18e3e6208bfbc0ec067568312ffd43994a36fd8ec. 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/ITT371800726.