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 0x23306066828a580d7e351d3561760bfcbf644e9b05e9ec4ae8d22335565f2511. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57622c68-a8ca-467c-a3e7-c74743fc474b.json and https://artists.proofprofile.net/proofs/artist/57622c68-a8ca-467c-a3e7-c74743fc474b.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 0x04703e007ca5f9686fd82218c7e64f0755d948a75d41741ef6c9b09acff56182. 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/FXQ732100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f2fa70e0c68e5b78daf033a6d2feafbec9020fc6d6a5600943e22dc95ad95b. 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/FXQ732100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038beab75ae13dd184e9578fd90bbb4eafd5e5b0da6deb60e6e4d2ff9e44698b. 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/FXQ732100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebd807d1571adba9f254416021a683cada2f3f2044e2865cdde7a51e50178c8. 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/FXQ732100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b93d0fc7b0a1a723ad314e79ea8a2428a3c1e2c7cb41959efb35b18238387d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FXQ732100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdead1fbda2f48b65022b464f86510290324d469f0522bbafbbb475e05d3d0763. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/FXQ732100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46644d3bd23fd84db7f819582090b191d5f333555fb4086ec23c659508e1a7d. 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/FXQ732100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a87f395f29c0d4cee123c7d93d5d066dddeb5bb61b65dc4adff49dae9aeef06. 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/FXQ732100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5801d965a2104138797336362393a5a7ba05901caffa5dbcd2ff492b76d3a17. 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/FXQ732100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe846a3377b361f2c6b51e81333ce16e52cde85a8a349535f2d85bf1d42b589f6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QMEZE1716625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9007228fdcaf5dc68a14d36bc0d9e35ed95e02700c6873b3b93c61c9319086b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMEZE1716622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef606a30453e8b115c69f11027aec8be59108e8e532fe7a66d0bb963a03be7e1. 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/QMEZE1716624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be9b05d776427a8d52163f330f66abf9176f66c422e0a16856fae9a36e53040. 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/QMEZE1716623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db437e8e73ad5c5e73a0f8c02b1624a96c30ab040a07d318d0fc97715420e76. 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/QMEZE1716626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c69f894af65263bff223faeb347101cf207b52af4e8f627ee7a6359f02cf5c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMEZE1716628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0696e22a9c70d42b7e98c984e6c7ef898162c23759f39f36819bb71ff27722. 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/QMEZE1716627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f37b106ae4bb90502cbc2fa3f3ccae37bce00ce6567f11ced52e3f9da18d6b4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMEZE1716629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a23b882921cd53068f68287a4aed330cca2f8d08ce02cde35fba63bcacd12e8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMEZE1716631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab4e180e377b3b0041f64018813979750b5906d374750a61ec7b0594aac0ab5. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QMEZE1716630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34796162f8015252f8a06e9d9d0af6e009330a191db89ab3f4365c0ea2878e87. 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/QMEZE1716632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c67e67e4e914322c8c904321b43574fc74607142e2c0ce4c4bf298dd114a49. 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/TCAGK2231631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0187fd981bf7e236eb585ff86a3c90a12d556b5cba864231601c5a66a87aa21. 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/TCAGK2231651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bfe6f9bec37281111a2e8ec3de34e3256b9e320bf66cec06dfa9c7e318ad7b. 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/TCAGK2231653.