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 0xce0977800b438daeaa814d9c47df49b76e68cf3182006383aa7b70d49e167ec3. 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/b01011f8-c2bb-4dcd-a9a1-73c364b806d7.json and https://artists.proofprofile.net/proofs/artist/b01011f8-c2bb-4dcd-a9a1-73c364b806d7.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 0xf9a03f2290433584dfa73cd64e6d426254f0f7bfdc8c72d9b7a3109ebda3c12b. 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/USUYG1123311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eb600e619eb2d1e73800d84d1d4a74c41598bd7baf7cf65422867fc015d51b. 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/QZMEQ2125506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2910c1b82fbc87188320edd95441e195191f60ac7fe9fe41f0e8cc2ebc40867b. 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/QZMEM2143060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc650f0051a2fea6b384d2a3dcc30c2b659b408513f19db1b156fef70c7a3d46. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPLS2158738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f302b7ec0c92893ff567fbf6712a6bdd9ea897ecafc30f96cd2c806b60291f1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTAT2118973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9489245fc7cf03d8403fafbbf020e081cc315f0de13f9f3beaef952a20d5bd4. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZTAT2118975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e3c4b6134dc6344b14ec1fde081fec23e5b556fcd8e49dd847f87eeac731ec. 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/QZWFM2325159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef1ffa69e5c5e675594987c9be9c1b3157595d4493e858ff9ab5cbb6caa9798. 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/QZWFP2338381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8d4cca3ca110bc545bb7810672367a7b698be7374a6abe4c5d522f7f73c6bd. 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/QZWFP2338383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65de074ce9330516e26252f1135a40ed10b7acad5f36671dd7b70eeaee29dabf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN82473899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f045cefaa4180f53ed38da43875f57a2be174d4b8be8a76ade3aaff8e3467f. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZNMZ2475484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6246dfc404802a3bf600705ff25e01795b1987758c3aae521440546d0b6cbe. 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/AUMEV2526543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7c9ece3c19481fd775c6389884bb5267d633ff3396621e27fb81d80f0b6e49. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWDW2574516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b93341c2ce789e50fcbaeabdd18b966c06ff1a1546b17a3a425d27d5a4eed3. 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/QZWDW2594833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab2ed56e7e380adc4a1e9207bae6fed50b48b4235e4a94985a0c254f165e164. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:38Z), 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/QZWDW2577691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290bb64632d979a223960fb05de6323b13b0795c6c4ba5d4e3c327c44de2be87. 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/USAT21702442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290bb64632d979a223960fb05de6323b13b0795c6c4ba5d4e3c327c44de2be87. 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/USAT21702442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319a0149acd4bb8c7c624cc3a8b33f228ac3444f8faab53e58953c47a9dbacf8. 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/QZMER2372274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34c42c5c47e3555b979816b788448a8a2e78e016443ba6b0584416be7fe1801. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:43:46Z), 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/QZMEQ2357679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e079edba3b4cce66cfaf7c15b8b38f3ab9fa7f6d58d32d119cde86b78f5be1. 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/QZMEQ2357680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa204812ace7927a3814e6bfe45c7f84e7ccc201c2ff552193add42090ed6660f. 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/QZMEQ2357681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8de363e5d3e360bdc106cf4996143e21637f5134d3858e9423f471c8ad1221. 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/QZMEQ2357682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa742489fcac19a0b8874177cccda45385645edd8dd4fe574ce689ff9d8542b7a. 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/QZMEQ2357683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f63f5cd0895d0d17943bc129698831aeb18e263e86559be47f481d8fd9d1ad4. 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/USA2P2449137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f63f5cd0895d0d17943bc129698831aeb18e263e86559be47f481d8fd9d1ad4. 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/USA2P2449137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efb009516cb2e5dc805551cff19aec59fd4d8036ef5f1901006b6b2f4b4d271. 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/QMEU32504285.