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 0x6b351647909e5f6bd84074d32dfa950e8350acc891fdce2ff478971054ade288. 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/d8dafacf-1a09-4b8c-b647-18cfd8da1010.json and https://artists.proofprofile.net/proofs/artist/d8dafacf-1a09-4b8c-b647-18cfd8da1010.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 0xe02303624b664755cb7bfc2379b17fac0c537b009885aacf6ee9237187282893. 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/QM4TW1749697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eaef693acde7400cc357d55edb1f53e2fc9f30772155e24bb3e7135186248a. 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/QM4TW1749698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6132e22e0dc4cb3d7f1856aa22cc1065698e7a8cf2020304ccdab0a94c236cbf. 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/QM4TW1749699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45e8d811352bc7abf09e95ad31102aa88f3e5a57c0e780267d2d34a7843ad74. 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/QM4TW1749700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c343950da01dfdd4cca0b5a413be805aada3bd4f7c48139e00148c68ca7b3e7. 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/QM4TW1749701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6b7c73cc6474d4abfb11196189f4fae207cf7c96931186daf4538fb6029d7f. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:41:16Z), 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/AUBEC2488905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68d23d7f2d3f2114ec4231fd06becc6a48cc5aca6342fbb5852ef874254149b. 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/QZNW72354554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8516339be9f7d869e61228d673c04a4c0f51d23d28a07ef2929465f75b8636. 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/QZK6Q2144232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b42f16b7264b81f3aa0ed7ec7295143a67af7a2d4c35381809be0df7c6a43cc. 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/AUBEC2138440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6158aa3041937d97becf1600449be1d40ef5f228bd0de43cf2dcc9dcab1a8. 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/QMBZ92066532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a7ed21c4f6da3ba4a89088a03fe4c94b8067226e8cc04ba47bf95f1ef99fc8. 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/QMBZ92065990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8a8902efdcf977ab2e157f9d6e0b83ef7c9c44e1f3aa34659cdc09fec0c68b. 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/QMBZ92065992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe036bd004c61979474e3f2a5de73e81462b23d390c6658ad266412886b862be1. 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/AUBEC2047228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50e384460d97e163281be0955721cd731f7146f7063c5a197a2b0e83aa7ad2b. 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/AUBEC2047211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64741f307ae295e82608af6a9d9aa5bcbe5a71b572324cc4075086cb63cbc18d. 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/AUBEC2047212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44769cb317f08baebb613478c45a42ac6ef92d26e1ef793eb3561770648178b1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UKQBR1801339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4be631b69643234359ed0f6f82e89b2f2b77493a65467e8390a8e804616673. 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/UKQBR1801340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5e3bfba43a54755e16005b4175b111dce623a1daa7ca9e8e80fd86d780f23e. 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/UKQBR1801342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038b5609de0a10ab4d4977646e9dda34e3d56e7bd131cf3e8a169a17464cd129. 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/QM4TW1749690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce88503b0f9e15b7fbc2e1ae8fde7fc2a706dd00657235fadc62f7f9b3425aba. 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/QM4TW1749691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96af36265185e7bd60acaeb269fceb55ed05be85578ea8b29f4c97677031f85b. 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/QM4TW1749692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5aa7836125d5dfa677d46207d4aaa76202587d38c0f5fdda865374ec5e765a. 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/QM4TW1749693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee30b65591cad9b7254dce0da39264bcba5b4a564f4419fdb27ebdad39c8f001. 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/QM4TW1748384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda246a5d525b343cea3af0c856b614c20d77b2d897da2661822da58b1cfe5bd. 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/QM4TW1748385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b406face1168ac46d7c2ecb928b3ae156c3ccaf669d0b86001650ab0f6c393. 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/QM4TW1748386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba8e7e8b093b5da329c01100408ea3248f8ae2ea9a9d33c507c5dedbc11c4c6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM4TW1748387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943ec0045056ca393fa2372c8e43d5bcd7341ab7c51fdc8a1098c1b7e6c3b41b. 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/QM6N21417005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba3200d46f9344259dbdc4f3d4b9161515b853096eb7da456bdd947632e8b9f. 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/QMFMG1386204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eb609e22d9455393be66d4c321698036579eb6ce054381641fe8aa84449279. 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/QMFMG1386206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c89d51938f874187a834b8e4b5de2e72029708d17e825de2deec6f0151655b. 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/QMFMG1386207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab89a4f4a9a4fef928039d1d2588c4335b7c3c06a42b4aa82f088d931d241f3a. 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/QMFMG1386208.
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