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 0xd0ce4211e2b80dadae97a49ad833a730118592904e4f21af5ca9ca4d6c444a67. 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/9d127ebf-76be-45bc-8b18-63f7b8de9ffe.json and https://artists.proofprofile.net/proofs/artist/9d127ebf-76be-45bc-8b18-63f7b8de9ffe.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 0x4b10b200e09a2dec97e1396f9fef17070af1b1064bdde4c0275b836b6825b4b4. 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/US83Z2049517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc35efbb5dbbdf4d8e18addf8beeaa1254165f3be57182b678ac56d8511a72fc. 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/US83Z2049518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3045a90accc1217167482aa7a7b4d70cb495144a1bf8bee5af60e0ad0986cd. 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/US83Z2049520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bba8cd4b3cb99109873031dbd6d8fea7f7e076526351568e6726c9d409db5f. 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/QZTBF2422403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f799f052b1b8fa2bc6d05e1398c5ff1282463d626d2bff41b77fe0dd1e7fff. 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/US83Z2499012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2293533e4212e6d52c793ba6c9801d6bb65c5c5bade1d14e6bc2bfaae7079316. 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/US3DF2496039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eec9f2be3270b645c1b949fdf5dff127b5a9d3f0c75711540ec135907c71184. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US83Z2484530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a313f234a4e27ba18e88dcf1253055f4084b06be475e4bd45a6196392e729e4. 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/US83Z2478769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225c1d4539c755430b798d16071009094149b3f5e22b99cf14418b98cf103581. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:10Z), 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/US83Z2461461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502f0b880acfa3cf038c2d07aa9e0e83d35933d47de6a0e69bb9a8040e92ba75. 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/US83Z2461457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9dce056e9d035d6ec7c5a4c128e7f27cd14f1d212ed982e6deb5617a6558c1. 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/US83Z2462867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a629366992e774a4c8e136166c853bac2938cc09e1bf02006b8d41c14ef0b2. 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/US83Z2462868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f3a5dd763513cce29057e175703a38db023db6bf27cd4de927fdabe6d34fb6. 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/US83Z2457473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209c83f0fc3fb9854373b8f3fae69e1cfd65a94eab2a559da6f5c19847ef4930. 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/US83Z2457472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5783fe23c431bbfc1b280b407bc2ce149dabfb61d3d623ad4e04b14433262ac. 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/US83Z2341923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12d0a7420573fe533e7972e74bad4ab665a1eedd42ce3fbbb6fa2b14ba1a37d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:35:11Z), 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/US83Z2350262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff42102cec5fe2f723fb2bfffbd1f659e2f930bf9c1841ef9e452652f4809258. 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/US83Z2350264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5d72c0fb9b56734d10c9fbe2284b93eb172f699b5ab04c8dc68dcf69abac37. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/US83Z2350265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16ad31b6cd6d95d0e38913c9adf155bbbf767dd0c8543eae303f48e15afd9e6. 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/BE6IP2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662af1d53c496344c4566ad066c00cde8da35f04e9ac591b130c40f74f473fe9. 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/BE6IP2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd252a10e5ecb471867bd1ea679eddb6171c2b4dc4a50d9d60af9b8c4cbc993c2. 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/BE6IP2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe369222be2d68ab4f44ffbbcf755e55b22d3d0d95781d1928ce275ea645c6821. 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/GBKQU2396350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a8124dc67ab7c47b339dd122a86887cca7f3c6b78742169570c2416ff24049. 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/US83Z2335860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b5b6c969a3ac210ab94d303cc5476d3a269a725e256727be91b8f0c7e58488. 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/US83Z2309656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4000b09849efc16791af5c4e46fbe33b94e9ce4974be21804821954ec89efe18. 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/BE6IP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea81987eb9aeb0e0fdad0555b6e941a6ecda3d557fa363dc29e469e0b3b11278. 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/US83Z2239560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df3af7c9ceb95201f762c9ab4aeeb72167a0a8ef938a956580be5f2430c4dd2. 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/US83Z2228709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54a96f480665a182195b9a75b704c0f6b61fe3bafcca09bbd9a1c0994bb7129. 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/US83Z2217882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a02cdbc280dd6d1d0131bde25db514ef9ebb074772085fee01568570ecd70f. 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/US83Z2214997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b3c6c6debf95fd49feb7dbacbb55409f059688b0e893ae0ea8bd3041fabcc7. 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/US83Z2210053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d25abc264f9b7e91c08e6badce36dcc098a20f0938176b376715474f4f6aa3e. 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/GBLV62126019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cf01bfe3bf592b5e11c69ea33c0d11d9bf9a3efcaaacd9c5acacc392f810d9. 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/GBLV62126021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2115a63af40bf2877697084e0b87b83403589e5a31f8f598f385448b2170b9. 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/US83Z2146555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697a808c1c6f5285694e9e055b2656d3057360329626e4f59caeb75b6a416595. 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/DEPQ62101112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1400b82f204d385796cc8779f95b49b8396bb51f9a9768e61fefe6e930066481. 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/US83Z2126517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a089baaabbfe1a383f22d867257a39637fc0aff32aa85337c1972ba09afde0e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:31:28Z), 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/DEPQ62101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad05b7362581954095c3c2a047c5e48947b8f956787105ec97f344936b9b6a38. 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/DEBE72100303.