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 0x54a41799d9a222bfdc72d8843ee165636c75833b536ca323c75e4df2b7372e9c. 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/5ef64541-f40a-489b-9441-f30291d990ed.json and https://artists.proofprofile.net/proofs/artist/5ef64541-f40a-489b-9441-f30291d990ed.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 0xcec0325e6753b652423721a7abbd9fe2493ec07938a92839904d39996647a6bf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BCNHP2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeb68940cde09c7bc7cf75127daf92455020385b43747d89d9ffde1056ee22c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BCNHP2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1625137574df5f09e920b8ebf8214f059981a40dcab2a890c8f43bd7227002c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BXKXM2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7028b48287c0f8216d89f0474c3c19d8dfd8d064a12ad865081b5bb6841bb8e6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:51:42Z), 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/BX14D2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a415ae53d2a512a18f0b9e9937c487946011afe1c45a17208f07e0c635481ca. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:50:30Z), 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/BCNHP2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f912619b031aa63b2b8f0bea91a9a5322cff564c6aebf15f09beebd4df6af02. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCNHP2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce2d6d9a0bee82f8a67b5a4c44ab07a31c3d1cd233966cf7da771fb6ea0ed42. 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/BCNHP2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cecaa5426dfca31167995d9a1bcd01d44b5567ca3d4e93f533cb534597f1d8. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/BCNHP2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f5d2871b3a71023265b1d6958142d1d5455d5b643429327ee94add8e8c0485. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:23:09Z), 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/BCNHP2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42ead674902b31a6bd0fa160249fdd2e12858b077e97d818c7672efc3e94f44. 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/BKMSD2500001.