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 0x83894344e6a1181cf9e8111c0c7d7401ec12f892b517be6de1601ab4bd6efbb9. 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/7a82c8ec-fd2c-4882-b82c-0e5fae09ef08.json and https://artists.proofprofile.net/proofs/artist/7a82c8ec-fd2c-4882-b82c-0e5fae09ef08.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 0x9efc2b698de0f828e983aebe4602786b5c75003b2b1440a5079adbec315c63ac. 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/CH6542084764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab53e4113d27d1183fe2b85b104a9f9df829548c5678cff90903341763990d7b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6I32197267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faa13cf96fdb92def7757fc6d7329b816b0485f745d624e9aab4d2760b857b4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/SE6QE2104244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5186449c974cf45363d6e67b56a93ea8b215fb2b77687768e4a9ff77e0bd3e58. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/SE6QE2159589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e047839b5676c680bac1e111cbfdb222d11cdfdcd66172c7040b635ac6bf1c6. 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/SE6SA2207256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1732fcb6c21a0bb38a2eaf45d540537847a4aaad41764a1ebf8767e3363d4665. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/SE5BU2490476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee8955c36ba7bcefe1fe30e927a7f9aa72168300dada61d69bca6ea7773a157. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SE5752492794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403487bb97a041594796dc4754647ceac6b1276b23f8c5bb6a6c7b64f3193ef4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/SE6QE2488657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0770c643990b3434776a9f7dbb8d380b88d6a5fc5b840f9186335290e3a684. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/SE6QE2488658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebd4ef6a995848cd7ec9fdd7d3e5170d64082fd02766bf2c6be08c357592715. 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/SE6QE2488659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aecba903b9d3b3b7add75d9d69f84f1902fc3ef89828a448bef098203c3c27. 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/SE6QE2488660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8afca0d0d81ff901fed8e99b5db595f52463ccbcc656fa5613fc8e6f561347b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/SE6QE2488661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71b90e08beeaf77fe48f44246e1b4af01544c49a67f121e5a7fe2859648a2f1. 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/SE6QE2488662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59c9fdc3454577c84192ebc6ab9b805e044b05d200b51d571f4bc5909a6e027. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE6QE2488663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54fdf0ca2cc40c2f6ae48a456863d54dc9a47a3de1a4e5bbfec2102e546b1e6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SE6QE2488665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe290b3b0ca897663aca75d8987948e55d415d558a43b535d3394641bde63925b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE6QE2488667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755da3fa9a4c1442ca8bfb0aaceb090d8ba44f2865b3556ba394d404d7dcba49. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/SE6SA2428735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b68d58b0369afe7d70bb78bbf76bfc1b8f65dd507caa6880048f0394d895c9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SE6XW2414018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c0c8063eb0d400cc3d70602e071ebe357e45a3eac319dbc0a2575c41dc3b88. 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/SE5BU2528829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2d3d10d689e56247df84c6ce772592fda9a5982908994294a401cf05a5857c. 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/TCAIV2450427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d7801a79e8101d31299f63af4afdf890145f6a65ccedabfcf23047d14b058b. 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/TCAJY2551127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea662289719e32ce83292056fe09f0be8b4e7cbdfcaca5ab6bf776b98fd0961a. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCAJY2549188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b27937e5e22876790f7decb2f58418e0a25fc803396a3101d6fbfff1854830. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT65Z2554008.