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 0x01b4bcd02e3c59c7562751eeed774a07c9502001547d645c68b6a3aea187b041. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/284aa05e-c457-41b6-b2ac-91eef44c69bc.json and https://artists.proofprofile.net/proofs/artist/284aa05e-c457-41b6-b2ac-91eef44c69bc.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 0xb7b15ba4dcc934ea95c27d72388f141838af99988705c7ed4fa9b592fe445eb6. 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/QZWDD2215884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd189967224aa9ffdf698b4ed1a40d170728a75b7e42a8a8357dc30af2a03f90. 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/QZWDD2216080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa166dbe2bdbc708b602dfe0652de20d4785974e4bd98fe0281d5eac4324762b4. 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/QZWDD2215893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5a018d2ed49a883e2c6a344de388f6434b116b5940083943ad79b9f9214ae8. 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/QZWDD2216039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4251c430f7e954a9ed78bf414ed1777d49f390a6629204085028d02d6aa8aa24. 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/QZWDD2216041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3eb8f522912b57b508de04880480d89eb839bcc80e93df44a01e565e77f3e1. 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/QZWDD2216043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f98ae0b88b5594136d378377ccc1a06c05c51ae9473bb7a4f4c8d6b8399cfb3. 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/GBWUL2257239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426131590670a6ade21a3a3bb61c649a4383ac631ff95fb4008d7d15706cd834. 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/QZWDD2216048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306a64fe3e5a5986ec2c04265824d74a8f5cde87d28333d240ab4ae481b1d7da. 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/QZWDD2216052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b959d0ea8a68f6052b0abe68901a95bbfb59b275d590978c72bb5fe908c03d8. 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/QZWDD2216054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453b99f5986917a1229dff8329b193dfe0c4c38ba7eab37c3ca5acc5a5aac151. 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/QZWDD2216057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5141b8d1485b9e499a7ecbf0ac50d76e6e39b18e076f45ccc1be201a60bb6954. 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/QZWDD2216059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97de12f966bba33cf931297464619716c2e54b5c3cef48470fef860718a945aa. 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/QZWDD2216062.
Cruel / Se Lembra da Escola / Cara de Ladrão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443f80530f7ed99941291f0050b7a4d6d009d974674b118ef43a17595c46b178. 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/QZWDD2216068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f638db164f0f62de98f1b6b1a88ec1593b863365321a7556a9247b64c380d5c. 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/QZWDD2216070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf211020e79b9157e9ef1ae78f9324502976fcd38af8bd8e483bb2678f7b4e33b. 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/QZWDD2216072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfd98cfdab2e4c360bebd58559c41d06fe6daffec0d390e5b6f3e7d3593a80a. 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/QZWDD2216073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4c73733a5204543d76255f38570c6043dd17b8bfbe6056fca59571102a1cdb. 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/QZWDD2216074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd3a871a676abd508edce0fe47bce8c0428dac8f1167c9d22a346fff69a8a85. 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/QZWDD2216075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2855eac5a839baedc5679647da98cd3323feec54578ef09037ddaf5ac4ff5bb. 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/QZWDD2216078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d77fa50fe23b1e534859075cd2d9fa0dcfc0fab6b7be43d28e33d807c6facb4. 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/BXZSC2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22fe728306283c1cc9f8e55614e3fd67896b2a80bb70ec963e0888fbfb3c3e2. 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/BXIV82004051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f70ac9bb6d935b2fcd71980923fdde940a73d84e08e8c53cfe8a04c16b5782. 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/BXIV82072734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8080ee754354bd453b39212fe6cbc58f19162e79833be72c6dccc23c5a811a. 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/QZTRX2371737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe527f589705172724c3459d86372c79c764b9b0c0a735d907cc0bfb975ec67ec. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BKBFT2400002.
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