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 0x38f836fc204c193e10a6fbde85c443a4d46a265f9b8c92e4cf4a7aab36acb8c1. 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/5f0cb02b-f76a-48d9-bc1d-8d092a8fcbac.json and https://artists.proofprofile.net/proofs/artist/5f0cb02b-f76a-48d9-bc1d-8d092a8fcbac.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 0xfe3812b3f0d993c0cb60d0c85be36d9849880366f71c4c9b10d4b85dc891b504. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ESA011579302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef55e94483f0413dc5828da57d8b226857b418a6b25db2c2b5f1a7036023705. 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/ESA011579303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7727462873f46d1f523d694299f2681e0fabdd2a10588c02efaedc355e806709. 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/ESA011579305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf1940d2b865b10d85fadadce1f61c3e236c3a5aa7266b4a95a89039b728440. 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/ESA012256054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e074b951e808fc67beb1dd29065f67a51fe61bd7944cbf5316eeaf0bbf2b5bf. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/ES8022300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3d312dde15cd9a730de04ff90cf84a07f9dfa3ee321bf16f48a2062d6751f1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFME2247835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb67b29eb3296191d702a10b7e2db9970a292da1a9351f53566f0477aa0119a7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES8022300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9da026148f3ad5747489a8a48b48b7aa0ef078b75d20fd6bd4778f9ee80eac. 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/ES8022300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a74768d657094f9ed86580358c4bac8bf53d9f1414db7ca78eaad5a0a3e270. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ES8022300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ea724774414299ae2aab4ad3b99e498b7864d4a99e810413de245e4ed29f5c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES8022300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a67b522f789ef72ee621c015cc3e60eec6e4538230731a4142b1fc8332c76c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/ES8022300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f18ef1c7387741bace74f296527962d749566c7126bc89056e3bee3212f6d4. 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/QMFME2358762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91088587b1a82d51af70cfcf56c92adf9b682a95e5cec37e3b759d27f462e426. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QMFME2358763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2f0e197ee793cde08efac48f2b48cbb15a24f6df0865cf93ef44de4de7c324. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QMFME2358764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e3b905c8ffe19b7b68463e074754a5d7b74d6c2a5db7b01fc9eb66b62bf7ba. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QMFME2358765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cb83d7e4e389899e1d32c74dd2ae4d674192ab650580e94138ac8664f5ae1b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES8022400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f1d5894080cfcbaff755d0d154cbb265dc985b9e3bc910e92eb11c9e8bba3e. 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/ES8022500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43f8171230fd5f05272e210d275457a34bd1b9e16d8d2d615528b9c6dac5eff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES8022500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6264bba25f5611eb49104c66c737512b771e0aa5ffde334a282ed7b4feaffff. 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/ES8022500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00295cdd33969af849ce131bed0734d2dface5ea16332fadc5cbc7f3d22cc091. 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/ES8022500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f05194121bb4b51d0bebb65759c7c4332f9a73277ed0f3548b005a240a06a4. 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/ES8022500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec2ba4900f4c2c7ec897461d8b682eac4e8cef624b61c3b3f6569ca68983b25. 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/ES8022500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c94c223aabeee39f6adf339589b1e1cd2d242d83437e8d911d07cc37c5b4a5c. 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/ES8022500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabae606196acc308b83715f41969f9cc52020332b6765ec75875eaa6abbf7f3. 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/ES8022500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc083433610f3697105d8bb4e3bf1c8d4804d9923683d42e255ba0e5a4aa4280b. 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/ES8022500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e71248733758e91f1f74da31af625cec04f04bb97b5c8d886e598ecd0c9081f. 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/ES8022500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cb5c8f528344e6a4007f2e37cd352b77253d5a0517e22cac50a45c50ae6163. 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/ES8022500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd478967c32621ce69771f3de645f59f916ca831671aaae7a8c4c77d1f05b197. 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/ES8022500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfee1d13e14224751e28bb44db7bf738cdc6553e9af5805a60568d731208be0. 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/ES8022500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0fbdec4f0ed106a470bddb6b0f5223395ab6b089ec699a878576c267749daf. 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/ES8022500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3d312dde15cd9a730de04ff90cf84a07f9dfa3ee321bf16f48a2062d6751f1. 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/QMFME2247835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a4f87e021df54db43757b4627d02b7398e692104770ed71caa503007aa9c64. 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/ES84D2300066.