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 0xd704d5ecfbd889d77d5114567d0f8ea5e93178e71865cf1271c28d7bcef96efe. 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/5e1f4f42-d695-491f-b19d-e4c1efeec4dd.json and https://artists.proofprofile.net/proofs/artist/5e1f4f42-d695-491f-b19d-e4c1efeec4dd.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 0x16b62134801241fc471d41c42c41eab8b22561dc7c213ad978efeb4cf53a3f62. 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/QMFME2366210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6634294340037ac2919a952795eae529e383a66f195e650b1f209f238855c531. 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/CLA472300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3400ba9a20775d5a8aa5ddad36db2a9eb0ef33dc8f5fcdfdbca88c8a002b7d. 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/QZ5AB2309030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fd4d31457390e20486ec7f4cb2beeb41d98c3d9dd177a594fb5be9c5bf6884. 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/QM4TW2402397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868cff77be6c2b3ba5fce19f13b74f41c01c08a489a61af023b65c4854ad9be5. 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/CLPP22300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab69e99aa33fc453625f03bd9c5b6c472c019d5b5c8cbb1ccd116f857fe6522. 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/QM6MZ2430682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868cff77be6c2b3ba5fce19f13b74f41c01c08a489a61af023b65c4854ad9be5. 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/CLPP22300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ea27f1c0d2c876c427b87eff109755c96046489b89381e693022d27cd1c2e6. 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/QZMZ92377138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89ef7c23c261d9f239c8b68687c5914354e9e88040e6dd3ebbbe9ba89fefaca. 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/QM4TW2498904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46f592b1794804d656c320127331d117757fd41e269202d4d847ea8cb3977eb. 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/QM6MZ2472258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46f592b1794804d656c320127331d117757fd41e269202d4d847ea8cb3977eb. 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/QM6MZ2472258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5a71777217b4bee8ec9e0aec269efb87efb7d0d121c5510aff6a73a4d36cdd. 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/QM4TW2498891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a58fe14de7b7eacc42522cf81d3b2434af34c9396499fabbdfbdb2d4fa53c7c. 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/QZGLM2417959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97dac5eca0135432cbf3485c928a89bf742ddf1eadea0e40f44339045dc1629. 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/CLAA22300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e8e792c82f069f37662b419467a992cc9016e021d05cfe438e5d680cccf07f. 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/US7VG2490569.