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 0xea871c8ab5a4b00066b22b9cb4f13c4c41427ceef813397f46d7de83368f7475. 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/4526239e-21ed-4fd7-bddd-05dbff889b2f.json and https://artists.proofprofile.net/proofs/artist/4526239e-21ed-4fd7-bddd-05dbff889b2f.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 0x66e3ed5c4d9a9de495e8244d514df72f670f74be545abc7d07a7848ee9befb70. 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/NLM5S2402228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1b4ccf7efa60fd57d5c24f16fc3153342ea4a53e8520695e95dadcdc9ce70b. 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/GBJAJ2300841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa058313964a8fcacbc5d191aa1d6842baaf68f23d59b768b1327906a09fcee1c. 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/USLD91738428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ceb70a7f40373c8bf9d9f94ce8f14698dbd6bd6fb9fa0b25fa52b73a4f4cd8. 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/USA2P2140021.
Push It Real Good (LOUD ABOUT US! Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc51225cbdda42f3edf64513bd71f528d605c8159620f3f0c0e4bc7309a46ba. 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/GB2LD2010277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92abb25f632f8867e072816a9f40350eb80dfcc733713b6e4a5725d750453579. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2022574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf4a2ef47c4981ec31b809235dbb2c87a551dc40b489ddef340e6b07e943b8a. 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/TCADN1852445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95319065297f6a3d647a2741b4450394a1456b9ba30bf8bdbedf0576b42c3912. 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/NLZ541700747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663e69a08c3f47e515a8ec53a284eab14870a8f68dcb085486066be4407f7552. 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/GBKQU2011802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9469452bd09c4f6643c4e8719f96dd52dc239907370c763bd3fddb5fc1403d48. 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/GBKQU2018785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04c68d9c985d274f054cff763ca064a77934f273896d54c9c1e3dfe93ec847b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:25:19Z), 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/GBKQU2018787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7d3f32d82aec1f470edc680e91a84a6ab17f8de627547a25ce2d7bb3be4181. 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/GBKQU2018789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e697dc6837d1fa38948854ed7f1f7b7f957a081258f81f15c2aeda1cc2cfaed. 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/GBLV61905668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd439e7ac0d79046cec7a9193b50f59e29607d1929f08133f4edc977247a411f7. 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/CA5KR2001325.
Toolroom Radio EP696 - Presented by ESSEL
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc6d16d83f0d078b80adcd612e43cd03abcf9909e3371fdca809efcc4bfc799. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLUM72400538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097da83042835d3bed1810398af7057f8a1a39df1fd549cd48819251ddc7db2a. 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/PL2DY2400998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00948e37a04f5ce0f7acfaae35fbf1fcf1bb7ee84ec0a23b36368f4ef16e886. 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/PL2DY2401032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5a19e93386e543090f5a14f52f2d14b98ce43f65e503559e5d8b4d598935f9. 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/PLUM72400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb0c7481cdb75fb362122f36fe476c078c3c43bd39399f79bd73608406b6187. 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/PLUM72400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463b6d864da8e00c2a2cc7d5e3ca394d8ff30df6bd6cd1d0c2773e569b9e59f2. 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/PLUM72400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010d66b11c6c7c9d825183b36b956af68f25ee3413e4e7a801f35641de9f556a. 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/PLUM72400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a4d1ec54404c83b03aa80023b49fa5f25510b698ef1aa9711057986b8c051. 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/PLUM72400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36db4d56205219747e6627dfce625d7726d6084000ef2e116d73ebe5cfe16851. 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/PLUM72400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34c54e0ebdd4e315929964ef29981e7e83a39844beb9667bd7061a39933684b. 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/GBKQU1983838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffff1ff2db08e7667fa8a12b5686bff921ce42100b0ad3780b0395f80b191dd1. 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/NLZ541800196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91dc95889d901833ef1522e6792aa9997e14c70a9d1afc0f81c411d9b9c174f. 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/NLZ541800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a389bf8d727eb609d8f5f82e12e00d0856a9d77639f7ea9a687f1786f9b36f. 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/NLZ541800218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54581f4706c67b5a3960f38f26049c265e4360692464668abd695fa473b02528. 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/NLZ541800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92db031ebc6e12206f21d2adbfbefa263b877871c1859ab0920d8d580a453ce9. 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/PLB382400904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0413b5e4d66a0ec4d834bff18229e68c83db47b4da52d8c54487e2917b64ee5. 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/PLB382400815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0413b5e4d66a0ec4d834bff18229e68c83db47b4da52d8c54487e2917b64ee5. 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/PLB382400815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee439f595461fa48b14acdabc95da9feb327d8c96f92abe8371d0452b8d2a61. 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/NLZ8W1900030.