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 0x9d8ec923cd55685fb1ae5ba0754d3784e6b612f177482705ebb7908604d9a56c. 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/e3a3d6fa-2b4f-40c7-a185-ce56f3529776.json and https://artists.proofprofile.net/proofs/artist/e3a3d6fa-2b4f-40c7-a185-ce56f3529776.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 0x228dfc7330cf7e648e1a70de8d37f1b38697a7f7f182dafed1344b88a7966c6c. 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/QZTAY2278456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee81cf690d5913927ff946551a159c6bb11988329086cca907df783c01581bd1. 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/QZHNC2417293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c6284d71015a304af14195e400138a412c769fcf6affa1754d39568e8df99f. 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/QZHNC2417294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f1d2239efc4ee7a43e13611407528276bdc3dc83c7b0f8719f3048229663bc. 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/QZHNC2417295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27cd6be32ce87e799c4044ecc0245ae9745a8e3443f0aeda1ed5624c443f6b4. 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/QZHNC2417297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbd312ef010d719bbe4fad3edd4589ee9696ac75ce33ec1819c3ac1e8c739c4. 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/QZES82472552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c7c20239e0f856b1a8a74a40901d88c19010bb6acea32ea311237c896ee75f. 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/GBLFP2475603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d56ee7269be254c6fa1d396cf70052de5bce2fdfcbd7acd80dfb11289421c3. 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/QZTBE2369854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f33e73ff9c94c737b2aaf4c87819e98aa72c9380a7c3f02f428b004cd3684e. 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/GXA9J2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b6f6bcfd59b0d908e13e266ec6c533c40a06878510063c04d18594f6f112bd. 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/QZTB42243303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2acfa5d8c67cc15c74001054d91f59c9f3754fc57b8a8fff5b268da7db5ebb. 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/QZTB52259828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5999e7d385f4773496630c47d9fd85bb79985cb7336fa392dfa2077a63303b. 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/QZES92255630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b564fa105b6314aad6c850e6c665f8f584b217c72716166b5fe3b881771d87. 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/QZFZ42218070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cc31f3ff432abcb2e0327e703ba90c0bafa55227d9ea5c61fdbac11bfd2248. 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/QZHN72125069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf6271fbc8cbc658c2ea56bfe1d4597e4102d8c664af5a6fb5a41ef55273526. 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/QZHN72125070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2f266ba244aef14f50a820ab2c8d17eb25cd171b3874710b8865358bee26dd. 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/QZHN72125071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b46b9cfc9801dd67f8bf05ef5d00cfb2237f5e89e2d2d127e03b105ecbc63f6. 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/QZHN72125072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fa06af46ecc0fd712282990309a37a25bd413d625dfff096a1a793ed12b62f. 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/QZK6N2064882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db905a07ff5c60074fdbd8d123ac673b073c70b598a9c31c979c91a2826a424. 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/QZK6Q1904256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eb10eae5720a565057dd5dccc8424921c97b4864b0998f6ecab72ff9c22a30. 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/UKXN22435421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c7c20239e0f856b1a8a74a40901d88c19010bb6acea32ea311237c896ee75f. 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/GBLFP2475603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac5d4f2f89904dd9acb21c86521c7b79d86e3573bedc95e40488a253f9da119. 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/GBLFP2373603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b384ee904428b7180afe8f92c675cf31411d04a53e8198771b89e09552aac9. 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/GBLFP2498614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3522922d8d40c6f9e622fde3b2a6037dbcbe2459d368d3d8ad8f31d3ca513a. 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/UKXN22435420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd788a065a5db9ff4e1500f360a6bf7537a8e6ead99c0767b673292514ea23a. 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/GBLFP2438532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51a9bd8a130d4ddeec2b93e5e4503c17cc3474888ea3e608ab11f8f6382d080. 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/UKXN22407019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3d6ebbe4cf62c2afde1d322ed25c0892e8ce4fca6717e601e01f42503302cc. 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/GBLFP2419859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a4a8914c8ee99f990e7dde8e24bc506439d6d6d9619c11c00532416f5070f6. 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/UKXN22435422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6629f369f9208e953b9d4bf26127a472266c88bb2fd631bd4f350a79030ccc57. 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/GBMA22349534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b21d5873cf23d6a6165a889e329eb68157c489d5bc5cdc533848186ee1e87bc. 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/UKXN22435419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe784591afc553ef60534b67053299142784279989a3faeff34de8fc245bb9803. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBLFP2498910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3549571d02a70a05e8d82500a32b1ad648268f3497173e8cde69ae16af84bcc2. 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/GBLFP2498911.