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 0x0c817ace730f6fce9cccd4ffe3e1447852effa9ae752d5c4692005a5dadb8e09. 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/319d2b23-a896-4c57-a00b-b9d84f05bf72.json and https://artists.proofprofile.net/proofs/artist/319d2b23-a896-4c57-a00b-b9d84f05bf72.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 0x8a18ec0536619c8f1f0e6555011a0fd1f3f62955761c92028c394705be4d984b. 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/USUYG1391466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dea6df3edc0f462ee3bed171afcb6dfa9c63e4d109c319f13d05e2c552e002. 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/USUYG1295391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b27e9948cc1e4ca281abfaecedd80e0594c4ef33f2f5d5c7163048a23495a58. 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/USUYG1295401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364e8bb84095df73df58718b0792a13cce4dd2c809e5c6ba174c9cac0e040eb2. 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/USUYG1277050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d04f9b8dd252fad28db25c58e5fcfdb2bacc7a17ddc0437360980cc707d6a4. 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/USUYG1252349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2facfd201c4c33d33e9fa907ba7756681a8f5c8c40d487f96b3d621c31da4724. 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/USUYG1252351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cef506abb82c83d17e8273d06edf3ae2b9dd775bf46855097a1b859250a465. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:26:35Z), 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/USUYG1252352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bcff5cb8a7822a53448f4829fcd68c002f77bb728bcd95cccdf635512b612c. 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/USUYG1252353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1035257307847a6d99bd78862f605f3105b063eaded485dc50636d1a6c6b35f. 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/USUYG1252354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7294c42bc6efc87359ab6a92771a8c2f23ddfc8a5e59b7d4f5b5bffb6cc584b4. 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/USUYG1470634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1fe506acb6af6ac1575e0208b4132e9800423ab55458ac0fefad73924343b7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:37:46Z), 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/USUYG1422044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccb858d5d5307163b604653eef7cd43bc4c48b388e0f4ede0bcd9e028634971. 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/USUYG1380078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3624cada1e556e2e5f1f464ad0840c37438b7be71c243fd7db6a87cd06d148. 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/USUYG1373695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fa6c105adea88f0853c4ae71fb91097b4c4b890e924b73712b37a6f67f0f31. 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/QZNMT2047787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1154fa9c37d2b830de47cacd4558702c941a2529eac7dd75d82fb3fc04da09f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:54:53Z), 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/QZNMU2016176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846b02867c8ccd9a412a262b3de0cd5ecf684904603db61cf93619fe5b639d4b. 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/USUYG1285945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364e8bb84095df73df58718b0792a13cce4dd2c809e5c6ba174c9cac0e040eb2. 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/USUYG1277050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1223856b71fdaced9511eb88ba15dd0c5afff60f51bcfece2e0abde8f34b70f5. 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/USUYG1274653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0807bab2b3f756d8add8f74ae54f58ace50efb857dc3e2c98b3dc9dc0fddf6. 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/TCADU1839988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0837cb4410a593ccf2b12ec1b7cba54b1a98dc49869fd4d5685c19fba3d2d6bf. 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/USUYG1286224.