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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b8a9504c30f38a8d5631bbd1198d8398081eb5274e52c7d1b79e5e55b75e6b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f815c502-0e81-4f58-b806-b96871dbf8bd.json and https://artists.proofprofile.net/proofs/artist/f815c502-0e81-4f58-b806-b96871dbf8bd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecd4444742045518217be9466eefce1f04babac9ee30a0cf5559ad2cfae7914. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNC2294469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d81862a946937f62b3089ec5dc6cb0a860669497eb934060a9a6e1b5f13b8d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNC2294470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78eb4c94804a4b4d4bdc67e5525e8bef8936ea24e83e6a916d17c0e236df4ce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNC2294471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde384bac0e151cb9845dd698a5d745f97ce329c1cd9029f1ddac9d169b7e2f19. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHNC2294472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664edbd47fabe5c0e8bacb32f310ad9b966d98705e418bbf01a137c0cf9595b6. 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/QZHNC2294474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e84396a2a8e8ca00c2b1f75f09e89760ed5c24d0f274bfefdbfe02eb1d5d15. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZHNC2294475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ba7999fe72f3d70eec811ceff523de8d8d69f1594ffc4e3cd2f214554ca842. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNC2294476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f8385dddd6505a178e17c3a0d897ed80bd15a5007781b3b557a27b0954a64e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHNC2294473.
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 0x9bb26f877d0b3dcae9ed56e798f7942f187ba1895ff98a0821fa94624fcb9b92. 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/QZNWQ2490242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4fda4bb54a5faa496c97fef7492a1e43f8712b1578890d7ca551efa1873549. 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/QZNWQ2490238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25df9f676def9057af003ee53c824c63add314ff89b85c613f3c0d29618ff8f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNWQ2490239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf077c2bd85cbd68fe43d92270f4b9117c911c000594587de0a83a2ce521cc7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWQ2490240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288a79cdef8a4aa2d849d875c959ecd4864f678d4860db5e732f24e23e8ee95. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZNWQ2490241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f5cf29d374a0d9adb3fdc8aa80fe8f260b760e7b073a409ce37d9d9757c06f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWQ2490243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38aebb4777d98367036830607190034633ac7913866946f368fdbf9e0fc2bb6. 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/QZTB92379793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96de35b3017fca77a903a5f8a82bc1ef0000f7b9ba9ac7669c1c1fa5e9b4e7e9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZRP52388880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813ea44db7c1793b992f3367d65976d71f04f9bd0330447718852a232dd0b44d. 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/QZRP52388881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20245dd7615fb7f77f0108019268f0e09fa8193b647b347af7097d6ad4e7508a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZRP52388879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b5db17422ddd1f614759c3999bcca046e03e97f2ac3ba853f2d8b092c7a00a. 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/QZRP42350825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef373936c97f819ac99cebfa0a8e3e7159aa644968b5d67f0fe3d8befa6b027f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN72368151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c1f5b450619c1950874f1814790a15513a65af697875d80cf5f6e76bcef93e. 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/BK4DA2300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb39f495931e72f827781328007236deaae549af6b4125c9f8b4878eab9ac93f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX38U2294668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43462e0abae8732530b73a10a81d95cb7cf9c0745377632ae6740cc8d079593c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX38U2270853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932ccd739df394f879e96671e663aeb3ae00347a475abc07646bd58230e65cb6. 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/GX38U2241993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6df7a459b7cf8a692cb01d3adff3018cbdd7dcb432a168f69c2e17a84952bd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX5MY2110685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c24ebc3b1c529079ffafaeedffb8b5ff95da8ff171cfbf6ed976d28774cb3c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU0056203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9c5b355354b4ac9f7632ccd7abee2d672b97c81866bf7af70889e999ce4e6c. 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/GBSMU0056214.