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 0x8dbb5212d73a9f4b65c61fda70ff4b2cdb2461636bcad4cad14ce338ff6c1766. 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/e77ff830-32f2-4151-81ba-a3dd09eca002.json and https://artists.proofprofile.net/proofs/artist/e77ff830-32f2-4151-81ba-a3dd09eca002.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 0xbd5dd5228ed8db41d61c35c93705302df373148f2594507167178878357d72c8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/VNA092106995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a2f77dd12b9f8e1c286a88968fbba6f71bd532c1c259d99efe8dd1c6ba6873. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/VNA092107009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315c3381c4505dd66e81bc32598d1ce5639b0f7f1b05b51e6c7c1cb0a1006493. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/VNA092107006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcbb080807644c64de34a9f2d314203428398a9444c9740ffce2da8efc3fdd1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA092107014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4734cf7c3088379eb206f5f5f9b79a7ab586d27383d19a646614f2b1d7744a2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/VNA092106982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7319c0fbf6485d426f40ce07b569054111887d343394173652e3dd7261fdce85. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/VNA092107462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0938669c81a1e46cb7311e294cc555ead3a935bdb96699de7fe7e0d54314c5d0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/VNA092107885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603131a6ee21ec86aa09b9f4b6c9d7efc44ecefe04230747c1df3436b2d106b0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/VNA092108587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5e164ab53aba950c26cbcdd67e71916373c6a74340863ec06411f02052c3f2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/VNA092107884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e180f99817e7e9a7b1e083f60f7911faa48d535ab0cb8dedb6ccac4d8ee00b2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/VNA092107879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b3e72c4cf5437512ee740409a81a3feee9fef0c6d06ef039b068ff52c0d237. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/VNA092107460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb59fe97b84199e26d8320f63eba7a53673a4342976807fc987743a85f79b29. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/VNA092107005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89417d41ffe37044769fd82e17baa7f6f86e0f690fa237172e8c95654d7015b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/VNA092107880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe148d946267c1af7c18b941a327d3bf9f63e53345307b34b13b557f5803b5f81. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/VNA092107878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf275281d359cd523edd812941e3c1c32add5aecafd3ad15c66dc507b28bbe649. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/VNA092106985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a89e7f0d780d5e5921d869de81d7f3efbf75599dd165655bf8bc8a2acdcf63. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/VNA092107466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a57cfc9dbdda5e9873f6812d2730d559196177c9fc969ca0d75074eeab991c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/VNA092108571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd161860ed5f751c83545b950572d05ca647a93270282e5c350ca55691471a7ec. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/VNA092107461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47cc39cfff8130331c677120ffb64cebc3de6010709f3bd9df01f568f2af5de. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/VNA092003475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99fd1c511b084343b1d11a44e6af6c046902bdffee8c38be28b948faac66634. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/VNA092107464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e4a5c71c83a56b60e575dc8e1204b39b38fcd57997c84cff39723949448420. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/VNA092107465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1958f745700a72746ce894c0c4bbda0baaec3a1e107616718dabb363436471cf. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/VNA092108581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a52e093de0ec1b316ae87e536162abfbd0e4b785fd63a00f3fd247fe1d6535. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/VNA092108590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366bfd66ea06cb3c783530d6b6e1abc5d57c8ee5115f8b67d1bbf159587d4c4f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/VNA092108569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c334cc49e167f9dbab4237a19d349c6848adf981e1c34650d78a9ab712f160. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/VNA092108591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878cfd42a2ebaf317f12b820556261492adfb3a3abfc55fb0154ce47fe0ca926. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/VNA092107882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7879b9d03cbec514e0bcea4873f963b2b80cb229d7363a0540ce04db48b64fea. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/VNA092108582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dacfed8173ef60144e5ae411e98ef02eec17afc350f2e77ae366903a264e37. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/VNA092107457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8b1647c0a3e0166497eec354a293334e7a67d619444258b19232af9443a967. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/VNA092107877.