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 0x8b229a6fb1b82294b6cef4227811be23918ba1392abc7e345f9eccb9ae3f3509. 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/f4f03e6e-caeb-458e-bafb-4f0395a20d90.json and https://artists.proofprofile.net/proofs/artist/f4f03e6e-caeb-458e-bafb-4f0395a20d90.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 0x3aa303d364edf4ff4c03fc9e655ab21d23b97b85f85053f0f4f56d67105f501a. 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/QZRP52376600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885cf64c801c6a92f77ed840f0ef72124c0efba90c369f84a5a8b7626f863b3a. 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/QZQ4X2200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203e4f0d5c32159fd1f99dbdd38cd6f35ed2c6656e8bbaced09cbe206efc6f19. 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/NGA602100546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970d6bbe1e33ee9e1df5cd11fe75cd2f0261cd6bb46d78badf54f603bf15ee13. 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/NGA602100547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa5df93b99c30aa09b4331d1e7464e665892c1f49edd8cc6fc97977685dcbaf. 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/NGA602100551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b88b03c897c2af334c825d622258afa74acdb3754a5f36895ab88778bc5d0d. 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/NGA602100552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f3720c0d72154d9d87b7037e940b2849188cbf836f49da56022c08df7c6145. 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/QZGLS2065804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5db513de5b7d16f30bdff966ca664dc8aab136a9236b5a4de1126d87ddba12. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZGLS2065809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cbb51202e538cc2929e5c96f7b29be7c4d730a40fcaaf04d88ec1f8bfadb9e. 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/NGA602000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed494679bd72ddda9429d1a8f54fbbff75babc99819d219ffaea55c12bafb46d. 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/NGA602000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60778132a8628c276dd06032b01ee6e20c1f4a750bf76d7f8df18b7e46d68100. 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/SE5752482283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d0e6813ae113829a5b613fcd6e870a16ba0e4073a070c495920742bb7ea4cb. 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/QZHN42417052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e6f5ed21c1c14effe9171cf9b82871370c2cfefb07dc7553dc550eae33af2d. 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/QZDA72483941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615e9d0663c89c2d7da8bef97767d8bd49031a108af53ce1a68bcc7b58ec18b5. 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/SE6QE2390119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35314593ca199bf2d9ab87eca5fae72b7fa82f4f52813ee8b515d5efbb83cffd. 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/QZK6H2315713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09343e426e02ac19f45aa8b147978ffb0607a42a2d0a51300cea17192874d2df. 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/GBWUL2397778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0033b7174d82f77dc035570cfeb42a4ad054d7e9f43c87dd2a7d77402844bd. 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/QZK6Q2306569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b8332385f9ea4ababb8c7801013bd8a2bfab6cbf3b07de252f451211dbd296. 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/QZQ4X2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7627921f98e097fd994a2516c880b6177a734b4dd67d0b34b9d571bdc26b580. 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/QZQ4X2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008f1900cb3b319672d695f60e5888ac69ab3a4da8297a23b5b8dadd3d07d73b. 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/ZAA6R2100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f0adc9187fdf143ae2abd143c78662cac9ecb669b82f1e34600cf26466a48c. 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/QZHZ62145636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9fdaed66dd0fb1a86b8c8a5e3c62fea29a3efb4ac3fab18ddea16de6aff6c2. 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/NGA601800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebec7dc117c950ddc56e02e7a5044bd74fb9700e10eab072416ca5156c6b406. 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/QZS7J2319757.