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 0xaaa2aa510dd52e66d805354ee15ba1036c0e529276246395c32ed5a71320b806. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30f462bb-46ba-48be-a25d-0f63e2a8ded9.json and https://artists.proofprofile.net/proofs/artist/30f462bb-46ba-48be-a25d-0f63e2a8ded9.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 0x594341388ddc18a596fbb8fca24bb675d6d27dc939df7ef477f87f103e05874a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAIL2445596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70e5190ce0e68a682800ad2713916951f8c02718b4064ccd6e70377f8c562b6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIN2445614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4fb76108cf4f40527d1634654033e7c7031c35329ebf57c4a24dee9eee81f5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAIL2445622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756e917cf1f56ab2433818fea66fc1560a1a11d12ac7b65e045ca0923e2fc305. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAIM2445633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad39463e0b0ffc559d8d7d8994c5136e515c1ef5ee9ab117ed1ba97447a64e8. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAIL2445635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad020dea18da113887e39d2d8f5689f6ae805a161d79b245fdabf263c70f650. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAIM2445638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d2796e68779a0b0a7f0d5dd1e4409dc618e7a8cb23a8f4c52c2cf2ed99f159. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIM2445647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c517c8dc942d620867edfff5af6eae57737dc9cec5828268d6f88c2d9925d7a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIM2445653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0016fc823c1f64429695220cda761bfc8d0682f82e63cf2bf6d28f8b4845f4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIM2445660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d13da880d8e8b62b8893fd3fbb710a7b383d46a2b3603ed66e2e4d41d5897f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIL2445321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bae88e88623f8fc5bb3972c4eab9bd2c4080e9db9231591be00d5cc03d783bc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIM2445347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2114566d37c7cfdaee1a1e790b65ef848588ccb01521e467894ed34d657b5c97. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAIM2445376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1092526870beb85125ae440de9b58298e0533ffaa27e8bd8a5a592315c95cc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIM2445432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bed90b661e067d1e45ca4856be8d5884955f4001ecf10ab1df0335f2dd4c5bc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAIL2445444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d39d117ade87b3e113c994d6a260d49d210d535f4d99e426fa521f4ee8b909f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAIL2445450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286c9a77502c9b1eabaa4cadbbe11ffa58eb97cd0c820fc3fd1925f5783e7e9e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:44Z), 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/TCAIL2445459.