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 0x8f0c777f5350407b16f285285eb371cc0bc4fb8a9a44ba5fbabba7b98b56576d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e47e6915-7cd6-4a38-89c2-7101621e2190.json and https://artists.proofprofile.net/proofs/artist/e47e6915-7cd6-4a38-89c2-7101621e2190.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 0x238f2e1852ae61908632eccb88f2393ab572ce0de303f205116b49df7cafab33. 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/AEA0Q2256814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08ade99ede742963359a5a68f6bb01d8bc0e3cd58afa977121455e3cebd8e66. 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/AEA0Q2256815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d7a5a36516d1082a3da45862c2e2d198ffcb33ed08355355519c3a5195a9c8. 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/AEA0Q2256817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a48de0aab58815461651653c31d23212061af6c27acd6d521a3082d33f0b17f. 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/AEA0Q2256813.
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 0xcd18fd698734837a151a5756c59926221ba4340580b218ff74151c8ceaaedc39. 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/AEA0Q2256816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c24859c255bed6b7b9b3e1bc6a54e3d04b9b090cf354f4f8faf8182c0fe9f3d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AEA0Q2256818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbe168794a342b9282784bf746d92c0293f011c52dabc2a0b4a9d144ce3cc03. 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/RUA1H2084144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7ea0728681d2e2c52b56acef8791346310bcda0f5bb1b1f466db680cad15a8. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/RUA1H2084143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf307bf9ee4fdaf58f07b6ee351b54b44f3d2e21f846c3aa97e5bb2e6396f6e7. 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/AEA0Q1845213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e034d7a475340feba72d0a1976e35567a158598eb3aa9fada8edc20dab4b0a8. 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/AEA0Q1845215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6572a63a17cfdfa73b41956565ae8f1e6809181185e0c827220745658c86e566. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AEA0Q1845216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc53f95696a68dee57749588b41776f1c9d4323389101418d1c6209cf49ba25. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/AEA0Q1845212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff04c06cb3253e539c5e15efe2b85a87f9a55ffd26aa61c99c30da5447bbaad. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/AEA0Q1845214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245393bec4b6cbb821f8c29e4b257af6f4991fc71a08fb9daa54886cb2ef4745. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/AEA0Q1845217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e3da0795ebaad0ab56d8303de548e3840801f7bc668a1911f71e188559c608. 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/AEA0Q1865301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ae766a44892dae0a5f140a41a0e89426ef1452f0e08ca0b2d5f10c0a172b39. 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/AEA0Q1865302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9761af5bcc0107d88c19e09f47d1de4ed2b30bc4b0a9e05a686c20c6f9d42c. 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/AEA0Q1865304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5b0c4630ffeee8a04656708604d12e3334be4bfcdab4729df2f7acd78c2d74. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:41:08Z), 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/AEA0Q1865300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd611bb1e7de38c1cd8a0d9a06969ecca20745ab0727beb657d8cd1ece46c144. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/AEA0Q1865303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a7340bfde6b1f956668c825d6a51504bf1341720dea383e91180d32e421e47. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/AEA0Q1865305.