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 0xa983a78ae96786bb25bb8616a03c6f005a66bf5967f88021dc733c26d40b188b. Chain 2 (Bitcoin): anchored in block 953988 (2026-06-16T18:23:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e1826b4-25db-4aee-94bc-aad590e3588a.json and https://artists.proofprofile.net/proofs/artist/2e1826b4-25db-4aee-94bc-aad590e3588a.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 0x3a14046a142c765edd72ba2fbf51ea1a2554c7e2648e95fd121185685a04f31c. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCAIF2450014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c74cb41dd236c13ecff078f4fc8ca151a06a3105e9345f845a6eecb42c8fe27. 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/TCAIG2450046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7962ba72bf325cbdb75830c66f4d9068ccc949e9988269dbf99de649bdeb81a. 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/TCAIF2450054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d773b2165ed801c03a3525152a019673f207793d724b775fe4862dc24cc695f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAIF2450061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324f7d2aeda82fd8466accefb36fadac5a1ac61b4b5f3db9b1f07d7c518f571e. 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/TCAIG2450076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e2b3dedb2e6fdf8c069c2da2f4a59c9c70dd85e746af5a7a5aa50f3077a98b. 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/TCAIF2450090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d059617c3b84ece54cc312f3b635e5fd69e2f5699c0059614fe5a6d26e5866. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAIF2450109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13cb0947b4b854ec3ed903ac7fcc887066f3d07049cf786d9bb81c7d1f96acf. 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/TCAIF2450115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0945e9495c89d64980b8b2418e1ed7e51f2d005da81376a0ba3ee8286afbb1c. 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/TCAIF2450122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d8fe7de04bdc45b230b5c978f0d8ec8006d68c7a028a30b8d1d2af5128d4d9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCAIF2450129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1c37806bcf8a1a76617e94565f7cf9f2eae3b0eeb3b4bdd49eda5c48bd47de. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCAIG2450137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc7c9f1a5fd84365b245c9a763930a90a2399f34e41bc03af2341b713a75afb. 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/TCAIF2450160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5ad30c68cc0dd3a9576c5b77f6f9fe857c336a6a5afa8e83e27eef7d78f827. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAIG2450164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8191bce8506b9bda9703d3615f02d9c81acb1d310eac31c81f7b5570dee1378a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZFZ62315912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87368a596f64c69b5fae71cd77be5fe5d5745783a4520f6bf1bb1a186199721f. 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/QZFZ62315913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bc80723de4045b0a0a2470781342e8f6319fd9a6978e8c639a8a73f202562b. 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/QZTB42237785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebfb937f4a1afb685ca574f60a2a353d223d4d1a3ff1c13331710653a7b4800. 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/QZFZ62315915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28940dfedfe76107f9c4e01fae415da5f51c966e6d6c976005c859dfde09b47c. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZRP52290525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14472d80c8d58b7a4bc323fb547c2b8c36970b775d717b2105fc6ca531b88210. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZFZ62315916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f25c28cc7defab8673f020f0e141139d8fe0c11c0815f54dd0bcd2b742a0f5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZFZ62315918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87000fd073d96ab02f4b01911b37d75bf4a6baca04a025243a2ffa578f35f06c. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DGA0P2428514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc7d3e4be27684aca6372dfc523085d3d9d147d557e4f157fc1236b0521b973. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DGA0P2428517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ba4e72421a8b6b8a4e81e1a9cea66695b4f94da7f3395949ec7d5741cfb1e7. 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/FRX452424221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6930e5251b7a3730e94517ef226426df503aad73e1cfed26c97bb62abf119a0d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWX2497781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dfa756637b8af8862282c19ede93df14085b4167f1c3493e2aea52e3d7f018. 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/QZNWX2497782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9257d8883a8c277ed761d0b8b81d3d6c5e55e3c55ecf6d98d0ac83ddd4f8a452. 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/QZNWX2497783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96f3be35d1db2530a8c66f3b0b9e24f49a7e56793d44d5780779129fee850c1. 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/QZNWX2497784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4b1cd2ea09c64f9aaee296200af3d709b2e535da0222ef263e93e360bdb578. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZNWX2497786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2421ab771f877fdd349d919c4a6f872d488361113b27df4f1fad79524dc946ad. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZNWX2497788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abd2f69f39c83a45f9072912a044823f325e510f9e267ef6bd285fe8b287fc2. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZHN72545190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03851aa5e78fc17d2b5445f8133efc94ad26dca1dab52beebb6c9d6cc6aaeeae. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFZ22517628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293844d338f91d928953d36cba5725b785c7254e164ce5a9a9a48cf59d5fe44c. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZFZ22517629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c79809f8f42727af145b87e00944420aeaa2c08a041ffd0dd1b0f6269ac304. 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/QZFZ22517630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce20f30acd971b8ee4410140050ffe1219a8a079e825b7d7eda924f8f67598c0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZFZ22517631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50da2a71b2c89ada6ed9a29a82cd0210c46b53b772eb7e8499a206eafdc9acc7. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZFZ22517632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a12c6ea46d6e4b77e8abf590f67d38b81711f65e9f051e722a8e704217bdff. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZZ7S2464001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd84170c76010197b3f6e6e9667c14106d8874af1cbbddc05be188452e4e811. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZZ7S2464003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a014060ba6da41c7fcdb9a8c4ea129d7d45a66e28f08bd720aae53d322eb03. 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/QZZ7S2464005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40428261d6bfe2aacadcac2ed09cb61fcfc2b2b05588539d2e8a7ed0fc8e699. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTAW2366383.