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 0xfd1e01a28d142c4a6956cbd50b0eb4001f3331cdfc8d40c30b2607504fd20a02. 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/eba4bf49-78b0-459c-8d28-b07a707fd6ca.json and https://artists.proofprofile.net/proofs/artist/eba4bf49-78b0-459c-8d28-b07a707fd6ca.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 0x8fedf632ec599e6a06ff7ebcc84082d91af62194af822446e13c0340d863d0b3. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QM24S1838177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f25632c119c00384237ada5a8179663729b7c48f48220a2b8b552aeba46487c. 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/GB8KE2208472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbc9b0703d8ac69afdc8ab0586216c5a2298bdd15ee55e70546778596cd7490. 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/GBLFP2511991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2243d6f799b43d31138e96a4ad444a774845482ced248c106d119a42e7e3ab. 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/UKXN22341040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0196785f23e368f125828c2db7e2b5bc64027bc39c122d887f30928ca03bb5. 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/GBLFP2511992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83c32cfe227118d4ee783921a7775be68f7bde9206c763978f0b7bf38ff863e. 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/GBLFP2511993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21637f34a400acb9853b7ea20ecafa1d7d1de23d896b4ff809d16779cbddcd8c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBLFP2511994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36687d86661f394bdcc8679a2069b32500123d8f7e64a3ad3ca239088a1ee0a. 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/GBLFP2511995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b56742b7408d3c4e1309abc3691600752cb4efd5999e0ea2a30f66782f394b. 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/GBLFP2511996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0147f973ff77d2986fc09390f2925a594c007b450997b2ea863370f026e1d8. 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/GBLFP2511997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976d1febe118f96da35f210aae50e3a4ea42c15333e65aa8c67df7dbf84604c0. 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/GBLFP2511998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b085bcc3ceaf88de85ad15927fdaf5b60a9c18d078a6b28921159be419e9c6. 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/GBLFP2511999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4392f90b59abb51374a8106dd01cb770f1b398fb7223bde467aa04d8e02f635. 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/GBLFP2512000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4ec7fd7a76bbdd9a7f345df579533748a2e1e5eddd19052ef1b5f37189d975. 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/GBLFP2512001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04d2d2656c94d4c5b5a61bc4b042297a89bd6f89648d2becf2ccdfb3324a23b. 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/GBLFP2512002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5cf0fabdec700159432a44db422374f292ffe367308d1cf70885f468323991. 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/GBLFP2512003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7aa92a358adddac037df401e7695e066eb556cc330b76ed4d5ee42d9c4fcff. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLFP2512004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b45dcdaa515d3742a976c9e5812a23b2b225e79d9d67f728500220c3d44b8f. 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/GBLFP2512005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f2a9867307856e2e768919eafe4df7cca9dc90251d9fe219c2b2f01e0aa800. 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/GBLFP2512006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54474dec737635b3bc4df743ecfec8aae52ce693a1d69efda90ec310ea24e59c. 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/GBLFP2512008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fe11c07f2685e982bb89121a7aebd80e3623c839ab2babd9e51b81f9f8ddd9. 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/GBLFP2512009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa90ca405360c29e395fa11ab791ced91177bc0cea909cb341452bfb09c2681d. 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/GBLFP2512010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aae3b03231fdc9af03603ebd7a920b93aa452634e84284f1b7bf228b268861f. 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/GBLFP2512011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e5fb4c82eefed148b2da6b64ac21e45bfe4653782f566f4134c95a1819716e. 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/GBLFP2512012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa010937954eefd57735d6dff7f2ea0ac65273060b2b773d54c8331842e6336d4. 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/GBLFP2512013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77786886a761d1447a3dbcdefd4943f51acf1aa502d311e268de51ac62708d7e. 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/GBLFP2512014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95415a58d48623bcee7783c3bdca1065865a62f95abaf08a33dfc112ce8cb7a4. 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/GBLFP2512015.