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 0x21a0ff5e25119e90409b995764b21d5a436c211e116838fa1b9721cd39eb066b. 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/bc07de8e-f7e6-4ece-8ab6-edcedae74a45.json and https://artists.proofprofile.net/proofs/artist/bc07de8e-f7e6-4ece-8ab6-edcedae74a45.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 0xfd0e8cd6f0457c346c96ae8af80c6f894b306a36d62edb2f8fd5843e5bafc8db. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US3DF1627447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f125b2cfb737e268c45e50e4e9fc47189f7765472a15494df6d7fd719411fc. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:23:11Z), 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/US3DF1627448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26360da2bd0d025be20697f4dcbdd9ea90f4659868265d881aa3d801ec85e68. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US3DF1627449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fda48031626de43828785dd2a2f63f5b7dcf3450bc67c84e81e908caa50cb3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3DF1627450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90975b9ffe29e5743391f42052c8a791df1f08684c13a563530152e7ecab447f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:20Z), 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/US3DF1627452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98677a0f8930bc24867b48ff7f30a7323094bf3cf5bd3f8b929e923a2699c00e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF1627453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0f008e1b332eb180700765a1fd430c226c2c28ded8247b026aeda9f9cbb13b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US3DF1627457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5cc8e104d4c26a7070f275f09de0ea50f67ad50c369daf0b7f253bd1db9eb6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/US3DF1627458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16436d9f5032e70c9c279557f6bfecab5f6f75d0fa10a412ae23a7c5b1d671a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3DF1717481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c38e80df225cb6ededce7a406b8169c9dfc0b4627291ea67d485afd53c8cf05. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/US3DF1719589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f0d63cd802c646309f0fdac81aaa18b4f2ff4b33ab03d7bd48ed0cd0a27c9a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:20:52Z), 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/US3DF1719590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259b39381815de095dcd375b478fffac93c465f4c10f162180fdcf34b7f7860c. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:01:50Z), 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/US3DF1719594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77eb865d48ece4f81e8ca1fddb3b8d3cc33e0cff169fc552cf1c6dc5391e80b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/US3DF1719596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c37b2d7065846920f1ce22e08b06b68ac2924e7ae7cd2d7d37abe2da5b1a71. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF1719597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b06523d9114c37a0a973593ab1c8f16f51a38ada282b0661ff864cde3d6a652. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/US3DF1719598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639a63357c96afed783208cc515976713797dc71df08dadb784f34fe335eb836. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/US3DF1719600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86e4aff6560d35758082664e0b3c5b858fc2f4ee14448d09fe56769b5ae699a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/US3DF1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dc212107ddcf02db664b7eb40ed735920aa53e5922a3c9cf179fa8f02495c0. 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/USANG2114654.