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 0xdf9beb224f65756100b11961fd2e958c7433e2f35105849f14a5b893abf2a54a. 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/96f14fa4-60e6-484a-8955-37aec5036a7b.json and https://artists.proofprofile.net/proofs/artist/96f14fa4-60e6-484a-8955-37aec5036a7b.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 0x92055acf1f723a036c2c11a5c6215c22057f281229836ccb08018712b2bee6b6. 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/FR9W12209492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5498dee1f0faa876fffe2f0bd1914e21d43ca002deb0887cbde47f31704be9b0. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/FR9W12209493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf473a37c428f9aa3801954b9ab42a2c7736e10248069b033ffaedfcd3d5666d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FR9W12204553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92055acf1f723a036c2c11a5c6215c22057f281229836ccb08018712b2bee6b6. 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/FR9W12209492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5498dee1f0faa876fffe2f0bd1914e21d43ca002deb0887cbde47f31704be9b0. 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/FR9W12209493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13542b4fdc1ccbd5f7f526f81a8f92858846f4334388ac9018d7de5d0a3e8c57. 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/FR9W12209495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c84fbea8b4e1d4b64b35d9aaac483a48277250be0e1afdff412cbffae04caba. 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/FR9W12209497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e74eaabdb614940382ee343e75941006fff7bf00a10c1c35caf933820524083. 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/FR9W12209498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe68665a5d8c26b8c5b2b212ca942b26b34f1030e1bb9938ba6cc1f574751e6c. 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/FR9W12209499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413c7ceedc0134a86c0c2a6c9eb1311b6613f5e98afaee7414965ea930e4d758. 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/FR9W12209501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04a0326e9126d7772038fb5446214e3d168c5ec02c6de45fe8a200cf9639f55. 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/FR9W12209502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f75e57c2cb5cbf2f10d1da4e3a0471674b2313ac7440902dbc796ba8784a0d. 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/FR9W12209503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f75e57c2cb5cbf2f10d1da4e3a0471674b2313ac7440902dbc796ba8784a0d. 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/FR9W12209503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe68665a5d8c26b8c5b2b212ca942b26b34f1030e1bb9938ba6cc1f574751e6c. 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/FR9W12209499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04a0326e9126d7772038fb5446214e3d168c5ec02c6de45fe8a200cf9639f55. 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/FR9W12209502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413c7ceedc0134a86c0c2a6c9eb1311b6613f5e98afaee7414965ea930e4d758. 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/FR9W12209501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf473a37c428f9aa3801954b9ab42a2c7736e10248069b033ffaedfcd3d5666d. 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/FR9W12204553.