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 0x5e01eb0827b7b72b448d5dd907f929b43e04a0e3997d7d084147947e1eac4b5c. 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/e08cbb49-6de0-4e94-b2fa-a8e1d2927edd.json and https://artists.proofprofile.net/proofs/artist/e08cbb49-6de0-4e94-b2fa-a8e1d2927edd.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 0x5c82c09e239caaf245721c81589cb9124a50b6a5df3d8f77ffce0b8cb1339edc. 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/QMDEX1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb4811a5ba1a9b290fc4804e4eb0ee5d2468ee36c41b4e07611528581b30708. 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/QMDEX1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80f5df809db1d74edb31e8e39bd9833b272c53f666c73bf4604e77ea257cb56. 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/QMDEX1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590d5b371e2a9cf97715932cc797407036ffef15468f5363a47125cfe0f72f3c. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TCACP1662828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080116ccb2df567bbede6d67b0d01ae4c088896bc9dd3c9bdbe2f4cb965be551. 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/QM9AA1438344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76309c86952de8ca08988a63deefdbfbf831cf48fde7dec29b4c8da45f95052. 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/QM9AA1438346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27647ec5ec5e7f1cf7447745cfea80176921480a4314525f4ea74cc5b1349e83. 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/QZHZ62093264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c77d97aa6637a99aeef060e1e14588a7422fabfb68c7daa562e530e8998113. 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/QZHZ62093265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0243d1c24a6f5e200699f2e3c569057dfdaedcbbaddd818f0f897d39ec6196. 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/QZHZ62093266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c735ab472f20eacbc22462120075aab819840ea0b37ae25ad29abcd1282df84. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZHZ62093267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b57c8dfde538508fb7a2c48ebdda0612331eb10485559742d4239f3c47748d. 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/QZHZ62093269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0b2d94fc11cf52b8b5720b13be246e2df9939950bec603354e9372b3c85ae8. 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/QZHZ62093268.
A Simple Record Made with My Friends for My Friends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02292c657f0f47a1f81e18fe058a9d7488122c8c7ae9174168747e5e50d93015. 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/TCAET2096864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd849ecba22531a5d66858a0348a44de16834217d868e0e5ba16d4525f9c8799. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCAET2096868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0dda767c53bed02340f706f3728c9bc6b757878c4e4d21902c6d9de8643b4f. 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/TCAET2096876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9670d863cadbcb067b057ba95a536d487b24f539d91b2df307267b6c0543b39a. 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/TCAET2096883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1389c5164645c7fda65fe06f6f5fd7b085eb1678d87a0f0ae6412e93df897621. 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/TCAET2096890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131fd20644f274f6b1d0b10f86989ed9eab09dd03641f25368c542dbc3d693bd. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMDEX1800009.