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 0xca0924d6273e2ff040fbaad3759ca030061e969ff5d3bef6e4baab7e40903968. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8671709-cd95-4a47-9c76-0539c4bf4a37.json and https://artists.proofprofile.net/proofs/artist/d8671709-cd95-4a47-9c76-0539c4bf4a37.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 0x173ad1703615a892956d6a59e6515895388863c97eb29d166b8a34ef1e250cf4. 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/QZFZ71900587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c713fe82fa13dbc0ac872db6435304302e7b9b4af133bd9ab65de3fd010cc8. 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/QZTB82254743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc211e4ef937d91a6b33d0fdb7578a2b5f76e33435893d453a15fdc44bb8ad0d7. 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/USHM81786644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0f9c698f172bdba4280c3c8b9f3b89e89b241c30dad620d09f339ceacc906b. 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/USHM81786645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa4be52fba054376d69708de4e548574dc42ee8953d486ab8a684701ed6c69f. 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/USHM81786646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2215393f17c5bce0d386dda907a861b0d1964f639fab716f77376ad7fd3080. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USHM81786647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5496c27121e3d907d55cb4fe9f27cb28466615974f01f1e49f97208e6fbd9a3. 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/USHM81786648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebb134c0962b8ee313af42508f7b35288f2eb280778cf163629b163dbc337af. 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/USHM81786651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1cbafdc7fd1e1f450b5846759996bef5f6643b531a68daadc17fdaa464b258. 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/USHM81786655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd463fae4fd5773a97742ea72a2751b24eec9342bfd0ee528c4f959ca43f84672. 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/USHM81786656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824db46f8b073025e7b9457c880e8642af1695ef8b6718757148e7bd5013ab08. 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/USHM81786658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f69b2a6e80b979c9281fa6c13bda1b506d1013eed0fd0e3db2b48405bf63ae. 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/USHM81786659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bbf0fecb6342cd21c527dbde73b8adf748e97b475c2d5efc092dfadef42f36. 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/USHM81786660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ee3e651fa75692dc5985d4833bdd294259d92c5cafb189f1fa64d0ee90e3c9. 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/USHM81723667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf70d80752381fa92bc2f9a415318b5ae5fdae9c0adce4c7a4e36c4a74f8434. 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/USHM81723668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9501390a4835cc939498b65a3390b6710f18473ebbb8e29b857a04d38637ec2. 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/USHM81723669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726cdc9505f386c71c77ee7f2129d9034077d22a95320f879d7a20619cb90379. 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/USHM81723674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06f0422d00b767aacb4b0b28c9c22559624e73f78d523a78f57a332a5433668. 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/USHM81723676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751d01f6319b367af80bdd9d16499a0af30c14bdca6c1b6e5de2c9a363fc6f55. 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/USHM81723677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c35aa91fc2eafaea27134e7cb8f668b5863cf63b8ed4df9314d8daee4e99c03. 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/USHM81723678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11af2ae8fd4601449b795806c3c8ff6acd4cd2ea074e97fb163cd6d3e6239079. 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/USHM81723679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c14d44f4936da839ac9359800292e7e6437907dda67ad540322d876c7519fdf. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM81723675.
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 0xf7bd4c7d495e07614ea890ceb92e35ae63ce35d7ec247a1b8f60314abb0d1ca1. 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/QM24S1822462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8bc80acfd44ee59f76133247c2db89aee611b5ee8344220988b5f9ea9d9cf3. 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/QM24S1822479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a85642a0d3b6d08cffb84ab29b3f0d2518f8772728a9eb205c97a183be92ae7. 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/QMWZB1710592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fa46e2ff62f2066c7f9b0286257f35698e6fe17d122e3d28addb125addc0da. 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/TCADK1710853.