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 0x5a947578fd64596b3df0694b1f9874d9b7a3d5aa95070c8740cdd1e54d4a847a. 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/f8f42d00-5958-422a-8806-4a249fd53124.json and https://artists.proofprofile.net/proofs/artist/f8f42d00-5958-422a-8806-4a249fd53124.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 0xbdf3ec5028fba3ebe3bbd51ec53c98c455b2c0c6e2ac0adcd4584eae12c02d5c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAEZ2012366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1494d888d153a3792f1498845d8e65f16ff113ec07b6ec2e8c4c15d426cfa3. 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/FRX872193986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af38814f9d6546147dcfd7957a93913bc4237ffae465bd309ca18417ee0b457. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:41:59Z), 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/QZZ7L2468366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbe611e68f4012c988266819d46a2b14814d386eb6b56145eb25e63e6b25752. 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/UKXN21997409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1398df1fda6f0a97a8974982b3823f72aef0891fd9cd1f361293e9c24f2b4ed. 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/USUYG1313821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec8b2fbfeb1100eedf03e1a708159155a545829987f7baaed89f85ac25fae85. 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/UKXN21997410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a7164193a4d270e560a12b3f13419405ae3fe3ee6260e819d0c7084b652c42. 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/UKXN21997403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce275de6f577ecacc9c84398bb20ac39b6d6e8879fdf73d97e5103e25f4dc0b3. 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/GBLFP1990660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0a18c7d7928fd31fd4a8cd1a25d2953dfb66bf5c782b6deac6c5ff4038a701. 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/TCAEO1960867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8027f301b320cdeb6e4eae5e5c24122618f0c770b1c966fa11b70c867f1932. 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/GBLFP1779414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228da4221d0e8af2462d53372f9007ae51cd837f37b37112d0f7ed258e69b655. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:20:08Z), 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/GBLFP1797261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8f5ea937f75d7819126fca316386aa86c37b0633c1cdd436d36dcb95f29404. 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/GX3Q92033507.