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 0xe80e974ce9f130e34dc35b93152c56c81e91406ad636487b17b5f84452eee145. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c6e25d2-3455-48a5-9eb3-f04bdc5e7370.json and https://artists.proofprofile.net/proofs/artist/3c6e25d2-3455-48a5-9eb3-f04bdc5e7370.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 0xed929e20bcdbea4b2ce7689ed956801f9c88eda0d9f72bcc7e8b577dee56f98f. 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/PHW012100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddbbddf5711dfef05791e867d73fe137cdaee4bb8067839c50803e7ee0843c2. 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/PHW012000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8c2557ee9e077a8ac3609f3aff2a06dcea6d36fe1799863acc3f75c2072ba2. 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/PHW012100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7746f8b7bc87a804e733ecb295e5351e0bbec565548217f2081720e6f24ead14. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PHS112400430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c78fc8dc41f172d07559b054c92f5c4409b3a95836274e5ad3eb3ee32be2e4. 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/PHS112400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8c2557ee9e077a8ac3609f3aff2a06dcea6d36fe1799863acc3f75c2072ba2. 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/PHW012100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddbbddf5711dfef05791e867d73fe137cdaee4bb8067839c50803e7ee0843c2. 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/PHW012000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d59298c4e252fb9ce2bba839d94f302dcd529e4f4602f88e5234b2858a50067. 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/PHW011900522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab27ad1bde8bcc51d8d9e0e9bdb12b4b6839f66d2334124ed5c8bf22f340597. 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/PHW011900422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b62bcf8dc57dffe86e7b02ad76d7267485eef226f0e26915cdb86e8af2c74bb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PHW011900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aff3d77302e5a5dba5b0c4916749f1e51c1def31a2284b60131acfa6cbc160. 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/PHW011800570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d66cf076a3c02e097c445977941ff50a50a2f83e2fe7f34f948d5db91ab0af. 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/PHW011800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd4ff5042252898fbd3ee69b091bdc50d471d1881eb799161e648194b287d8b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/UST8K1747550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b1dd89112927876b7ff8de85989e5e8b8c259fb3059672b78b374302fbfdfd. 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/UST8K1747551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961e31c84e5ac519fa61d98a45bd6d34b10a3d4185af15b638fb2b3485fab8fc. 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/UST8K1747552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6082f4d02acd579bf74a74b0c214120d693de6527b9c4fd59b8bc48059c8e2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:28:58Z), 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/UST8K1747554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17469a964cd5a4b53fcfca4510f70c4296894db75a21a5d62257505e14464ee6. 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/UST8K1747555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc579e9fbc7fc52dbdee430d4696f8e10ff18b22b49709ee3bbeafebd963d6b7f. 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/QMPKX1790459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d87b3110c7ee6606c9d7a4e936a646478c32ff73db99fd9412005c556ae3d2. 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/UST8K1672158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf5c0c69c2ae2d4dff381b89a91d57add6757cc72b7482f1a5dee8f24a45ebd. 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/UST8K1656642.