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 0x5fa61fc06108009753cd49c11e9d54f531e7516c23d3095869309fe653e4340d. 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/4f70a701-d92c-4718-8d96-95c250c2e35f.json and https://artists.proofprofile.net/proofs/artist/4f70a701-d92c-4718-8d96-95c250c2e35f.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 0xb2a87a97bd34fc609df5c254663a277ebbdf278c4dbc9e8f0702651a94547953. 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/BRUM72301688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa670f7f80b58fa1e53d50069d3f4e7cd3408533791edb5706376dcb3e8c8aebc. 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/BRUM72300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e50c6e4cc4dc19a29e13aadd5c6bd126b7f1fb420c930d93ebf67a48bb2bff. 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/BRUM72201974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e89c51ed34a8ea6023293d8812edf873c08df4462aabbbdc0246969896fabc. 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/DEXO32234750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae483e6fd4e26014f6319b1e6b00a903a214ebd5a392985fbda676c769ba5ec6. 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/BXHBP1901065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f648c4612f70b70b4f5d8966637740740fcd2c340f6a087cc6485dee7d311f7. 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/BXHBP1901021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73aa13ab97244fec5c1f62ba806c285eda8fd814999963f68c8b2d2b641e925a. 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/GBEH42010230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fb43d882108cec5ce7a6baa52061ccd8714cb3b04e52ad0da31431b6500025. 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/BXHBP1900818.
Cira, Regina e Nana (Groove Delight Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4736a09099400e1a9ca132650ffcf2a723d235590ea44718cb51f6af836fb421. 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/BXHBP1900531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbef179cf0275b928b415b73dc3b25eca6ddfe102bede5c0041667f8ca5fc01. 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/GBSMU8096015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9548dc5f18c069d41c075fad4dfb07ac4439b0a95dc7e83cd40d8b3c64a51c1. 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/GBWUL2093688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940b333c30e9494de7023704643f2421115001b34d2947299326b17cebbf1c3c. 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/GBWUL2093697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb237909c5e6c821236313139487b9b3193bf8b70876e853cbc02b2349d8370. 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/GBSMU7585046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf92934ddc7b318e83157b89803c9ba89d39807e1b548a72b24423fd79a8b506. 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/BXHBP1900256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa392e7f3726e6345b10e31456705383095c41f8eff12c56b0acb9248732bdb14. 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/QZGLM1962119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe5b7ecbc6e22d2f0ecd63b74c2f41f179eaa18e3891d1bb2ecacdf99519955. 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/BR7A41800126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b3f9258e452d4b519bbaeaa0b271f072929644eab658c2c39b741fdb9e3167. 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/QZ5FN1948720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b054fa5fc53b09f8260608220b8eb442906c9b173779e7027a32f90ef02dc6c. 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/GBSMU5836714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d181b6d57854fce8bb292c311a70906d2244f71dcdf8199d01a5b5289b56716. 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/QM42K1833198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c958c20521388d26d94e35c327cd6e755ba2b77367ec15c3df3ca8f79851b2. 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/BXHBP1800182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c500392b687f1a6c281436ac9ccae83fe3754a4378f03c2b97359e1c1841446. 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/QZ5FN1765217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45030481c4ab570a2dce8960428ea0a3f3e7d78e99683145edf8576a53ba521c. 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/QZ5FN1765221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd18fe3661c2fc2d3d5fdb711a186f0ed84e9392cd0fc620b971e751653a6d6. 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/QZ5FN1765222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6091ca4176120f4725e616fd47d957cdad5faca489a4b483b9e8dcaff2ca70b. 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/QZ5FN1765223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f7acd90b2cf8b7861dedccfa16383f4f2eba49fbea26d4f9fc5a3a4e2aed36. 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/BXHBP1900255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1561b89681eea89784d92ee781715b57060f56fac0d1536ad85bf823825fac7. 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/BXHBP1900580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121c9d2d542a54acbe71322e94293aa609d4c00692595a2983a909006af82413. 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/BXHBP1900774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667a19b5824396f8fd5441bb9d3e61314ac0d4305855d797bb72b645f94a88b7. 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/BXHBP1900138.