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 0xda95065066caa6e07caaff04262033ff254165006a63436aa67824c7d77c0b4d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70c77f62-7882-48ed-a812-6df6da36525f.json and https://artists.proofprofile.net/proofs/artist/70c77f62-7882-48ed-a812-6df6da36525f.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 0xb1ac2f801a87c72af10852df3dd55cfe172b7fe97166b1b234641269a080af34. 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/UK6822213337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c74d4e4e2b29ddfb38b85693a10285997437e389dae8589f695bd6cff32e0e. 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/UK6822213353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ba7fe1db5ef1cf3251cd03a58d395fddf90848b54b131bf828280b310e212d. 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/UK6822213767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62b19bdec08b15b6032d589dc4843abd191eff64cb464a55f0053df8c8205e7. 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/UK6822213540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5462def6644a73267f09ac75dfbef97ba1018918b60eb3ea2a9e5553727dff. 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/UK6822213233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d4d3518c50e150548ca71bbf5fe9ccc4d82d115653d325987139a35e486724. 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/UK6822213974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ae5c3f91b5c9bb958c244a59e4ca794c1ae1eea57affcdcbb8cd22b3bc42a5. 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/UK6822213322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e53acb09581d629194fe09c4b468112636ac927d65f65b3343ca6e932d14cf. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/UK6822213263.
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 0x09ca2582f6d353c20f84b06f27a09d3446ee5040fa18764341f38080a4f62023. 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/UK6822213340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa502d613bc8fbf5076fa587e804edc9427f831bb8705986c3a2d992e0aa17def. 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/LTC761900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d5980a22be3c015d0f374c0bf3f8227b2af990a7ffec58cf457dfbc0ae9ba4. 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/LTC761900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e46c19be8678b8bca4d3adc869d4728e63f95ed55baf50aae047f8d6fcf947e. 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/LTC761900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01348cd4163deb7a2657659c99294e93c2505d3386681d7ed3ded977e5e173cc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/LTC761900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa19d5e0125ad316a0d9aeb30c389f74292a4e315bf729c29ba0831a9cf8a00e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/LTC761900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96afdf440995dd08b5eec60c22b2ab6c7c9128872afcf7f3590684436c204a3e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/LTC761900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576168d24aaed134afbfe137184546d37b3b9d07bbef95d0773687fa228d6a28. 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/LTC761900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcaec985b659a818bc6ad55f6e64728268ca36ef5f8fed519acbc249f780d03. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGH1611820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c2efd5173c4411e833b450498bc472e5847cab5a9e2f5f590ebd364f21cce6. 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/USCGH1611822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5fdc4cd1c40b392210e241e7e6d6dc0810ea95875dd138ea6d8acf6b1ed6e1. 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/USCGH1611825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ea91ffbb091baf122da6ffd5c1e4b3033dd22e9bfa7ba3171a53ac161f3c97. 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/USCGH1611826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211561e2033dbd094dd60ac2d2eab25de8abf001ecf091f264ef11a26a839da8. 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/USCGH1611821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64902f4bd16adf1dc6c575a860143eb265110c9552b6534e1a23d1df29573ea. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USCGH1611823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dc21359c6c52fe41d3cedc270650156723552df20830873004d3d668150552. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USCGH1611824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dbb17aef8c9e724b349445508f3bd0a4c07ac661126e196638e87851995991. 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/UK6821400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093548e89a5803072c754479d8bc4db1ca66d28bffdee39ee8d01b860ac5e300. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UK6821400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadddd8d061b5bfad8836bf6f2f3253a657aa2cd8ec55b0d49cce398f48f401c6. 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/USCGJ1465306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cae0cdbd1e6c70d25b3bab0e80c6bea4d35883317c6f5aa97e4b481a09198a. 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/USCGJ1465308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048ba89acc5fa3dbaf4b1539d5e7f97961678265271a26a3aa25ec9bdab7ac56. 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/USCGJ1465311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae52accf7d209ff7660b4991ea8135ca3cc3bcb353b86948fd96b6963d93a32. 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/USCGJ1465313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af790ec17c1984310558b2b6275842682354fb6b84bbd3c004f985b31cc3153. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USCGJ1465307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30841d3650e752b181d97da48825bb9fe89e15381aa9869e3cc5c23c6688b283. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USCGJ1465309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2392467f8ab0106645f9ab7098bab06eed64a6ab453c0906fc944e1637e857. 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/USCGJ1465310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd609357c8af744a8bc5ef48d520235f0d5795b2d35fcdf5cc9866d5afb7b9fee. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USCGJ1465312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac980f66ce769ccf533996bd2fa8f8f5786942d269159655d16d46ed63ebe9e. 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/USCGJ1465315.