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 0x42a69b24d5837942e9c45d4ff938121bf898d9f25740f70705605e3fee145501. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c3a5fbd-e687-4f97-b1d3-2472965a96c3.json and https://artists.proofprofile.net/proofs/artist/2c3a5fbd-e687-4f97-b1d3-2472965a96c3.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 0x14304bd7f4a8aa7d1835979870878e2f6fa44be06374e9243257d7813ac49ef6. 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/ES71G2310659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5a75f60a43bb968e7df068a37149b3a22638f7192a258f1357685f07c91ca1. 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/ES71G2406741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9d3d4bf3af1ecb17b2790097263098c0cc4554130e7157063f8c784a3b13ec. 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/ES71G2400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59da937c1abd9bdce8f35056fd9026c174851cd7bb15af6063420beee1db3a2f. 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/ES71G2403676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1ccb658f78969cb0d0e8cf2ec72b9c0ffef438530664b1c78aedf870aec56c. 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/ES71G2315891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf346cf94fb0f6583ade07b31e278759fda891417f633d3c0865ca68dca5d89df. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2406745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd4feb829709afe0a7fe17dd7d39fd5a53806963af5c40a0d38e194ba5d766c. 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/ES71G2406746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8975ed536a081992e23eac8ba956369131b6b0f5e7e18e14e45795590fa3080. 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/ES71G2406747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a2449e6217c581359a05665fed11b1f81e9132967adf23b9cbba365e54b2e4. 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/ES71G2406748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d304e589c7cb109b85e663ca04be50deb5b53352b3aec0b77f5e13b6547bdba. 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/ES71G2406749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eb2e445d663990ff938d6565e0bb54e89bea516ddd8df8512504cd473dc8e3. 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/QZES81903187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf020f7e568b959a7bcddb52291128a0e08f65819cc45cb20d2688a5812461e. 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/ES71G2053020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3be4060230d17a08eac46cb6b0ee9bd143c8f3f7c55bf4fd0b147b9875e4e8. 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/ES71G2117936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa499ab6250385a897ad06bf31027bee076ece2f8726155d139c4cfc34721f799. 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/QMPKX1897057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fac85bb488b8e3892827876c865a565f16565d1674ef11fb1dc8a6e5b396a3. 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/ES71G2405519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59da937c1abd9bdce8f35056fd9026c174851cd7bb15af6063420beee1db3a2f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ES71G2403676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9d3d4bf3af1ecb17b2790097263098c0cc4554130e7157063f8c784a3b13ec. 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/ES71G2400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14304bd7f4a8aa7d1835979870878e2f6fa44be06374e9243257d7813ac49ef6. 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/ES71G2310659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1ccb658f78969cb0d0e8cf2ec72b9c0ffef438530664b1c78aedf870aec56c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2315891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9d3d4bf3af1ecb17b2790097263098c0cc4554130e7157063f8c784a3b13ec. 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/ES71G2400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14304bd7f4a8aa7d1835979870878e2f6fa44be06374e9243257d7813ac49ef6. 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/ES71G2310659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1ccb658f78969cb0d0e8cf2ec72b9c0ffef438530664b1c78aedf870aec56c. 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/ES71G2315891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1ccb658f78969cb0d0e8cf2ec72b9c0ffef438530664b1c78aedf870aec56c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES71G2315891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14304bd7f4a8aa7d1835979870878e2f6fa44be06374e9243257d7813ac49ef6. 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/ES71G2310659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad8eadbcd93b3bfc39cc374843459754e43da8f9a27ebb94ff4e89a96d82fad. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G2208074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dfe77ca722c3025274ad6739fd82951ce4dc0a13d6f164c364c5e90cbff900. 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/ES71G2040190.