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 0xd5ad3507046efb8cf6ecdbae3d4bc64faaf0538c0944fd17a63cf5988b78eabd. 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/dbf5b03b-01c6-4f4a-874b-dcc662476c73.json and https://artists.proofprofile.net/proofs/artist/dbf5b03b-01c6-4f4a-874b-dcc662476c73.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 0x9015f034b1ee1a8b5a2574cb432f81d4894d04fd5fb1dbbb8e878b4c5f45afce. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:05Z), 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/TR4021102632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f43908f189fe1762cec5255ca92699546b4d7ccba8d3d8d757a73a83be0251. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:09:52Z), 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/DEAR41432475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0179e50cd890eb7a8c26bdb36965af1836972251ef1eb003c616a63f7f958e3. 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/DEAR41426569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa626250f1bf9b27f62730ab0991aea97e789a9ea997782cf54c439cdfd91062c. 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/DEKU31400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cddd8a5d7b1cfb60b8489c59d5886256fb24253c16919bbefff84c925199681. 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/DEKU31400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfff1737145c5fb76d98f94677312dbc61e50324a20da2a5bf94b38912f10d81. 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/DEKU31500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed8038c7da85c3b75efea90b71705d5b55fdd2d3ee0b7a2fa3e364bd1414abf. 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/DEKU31400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3154ef3851392e249061d55b623564d453ae189781956e9ae8ab3e7c0c88dc. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEKU31400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5a0d87e137f25d611910a466fce7094044911e293742ff4fffae3370a11da7. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEAR41623423.
Istanbul (Consul Trainin & Jayworx Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a4dfbf26dc6c911d4a1e19bc9b77012306ff814527a97ed566bb2e04e2434c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEKU31700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca0d4f9565181f75609797de1eafefb7e09ba0b642afd99c7f09dbfc771555a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEAR42521752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a58e4e6ecffaa0246f389d95ac58c0ddc250d5f2aaabaabb3cb712beed40af. 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/FR6F31716910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef673d90cec3b51d4342a76b8234cb870220c5e489a76777e9d1a3d80f329a93. 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/US83Z2354748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ddfff4f353b0d8188af7af394d1a0a336bd77e95f9bab01fab30e21bc5f656. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US83Z2348530.
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