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 0x100634e115965ea5f3514c85ef0de6d3b0e9d69631519603ff5621f3778b7e7a. 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/29c29081-db56-4c73-8b93-a11151414954.json and https://artists.proofprofile.net/proofs/artist/29c29081-db56-4c73-8b93-a11151414954.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 0x938df9cf0971346e2a1194000b3a6f6d509e99259ede1e36b80d0a13f4198718. 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/QM24S1704721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec7edc9e83146495b0b4e82e55b3e3949fc30686a07f89c9beef227090dfbc6. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USYBL1800533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938df9cf0971346e2a1194000b3a6f6d509e99259ede1e36b80d0a13f4198718. 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/QM24S1704721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be613b5224b722e93d0c7014f6ed66a1a64094b79c4b6f7c3208a18fa55aeb9. 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/QM24S1841718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171cf55fd2f13d224e71551a00a41a366690b35598e615cd5a16e2e15ac1a683. 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/QM24S1841719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec27596603befdfbccc86f11b465b0604fc79cd49f5df061921e463f78e3d8e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM24S1841720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c442690b276409ac0c858aa0f2449ac2efdc34c230423f7d1c948f1e55231b. 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/QM24S1841721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29aff620e19d3aec1cc8ba296cd732b266cb2447a5b0c886e795769fd07c67e8. 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/QZFZ21936877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e59e104429203de0ea2560869010ac6a1c439d8ca9eb92123880267a0f8a73e. 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/QZNWT2039836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e59e268d77656295754f1075e09c345e79c4cb61d14560b1229cf836103d81. 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/QZNWQ2135972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223e4a71f8ee9389eea0356c4dc95959d8da3e6042cbecacda6a4273bc04b415. 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/QZFZ32236976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d0126433a90446bb31252498b69d06cc641a5ad02e4458f600901525389061. 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/QZFZ32236977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3693ace650109c68dfb5a02b552d751618ccf43f274715b8fea65343852dd7. 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/QZFZ32236979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c62763cfdfb9aea7695ef6ac59e17fa85ff40a170b61a102cdc80a4da1d667d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZFZ32236980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf00bcbde9a7af08bb8fdb3b6b5fc19c1a0320431b7c5a8493cb4f24ff5f90d. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZFZ32229626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5976ef86c16ff479a7ca9d1a0f3a11a0eaf0551b2ae188c787324fb1b57f10b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ32230269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d60a8fe722c156acb6210ba94714a809e04ddcd9e90e519ff8e3f3f3f3091a5. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZTB72282222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f5b05c31bb84c3c6bfc898f85439d4a70567252d14e3ef75101f7ace9ce7ce. 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/QZHCR2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4ecf195c98e28c78e8065f665a221c01690e585dfc6761dde6aaeba505cd14. 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/USUS11800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9697b0118d796137f974cb8d248ea3c159ff90778775c9dca5388eda04bae797. 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/CA5KR2333619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088ce0d918f707d32a0206d82434f67b7d03c5a535539feb03b127d67b1e8852. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CADUT2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e29eba4eb74e549de9420070f8ed4b35d124a7ad47348320bc25a0e7033ddc. 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/CADUT1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbe8282d072772478b3f75f6cf0c381158302c55d8400fc27384dcc7877a6d1. 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/TCAEX2067958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e59e268d77656295754f1075e09c345e79c4cb61d14560b1229cf836103d81. 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/QZNWQ2135972.