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 0x225f21d43684f0bc799d9f5fc403818cf11af4ab6ed8043d0d279272f799ef00. 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/88262072-e916-49c2-9a46-2f67f2486ecb.json and https://artists.proofprofile.net/proofs/artist/88262072-e916-49c2-9a46-2f67f2486ecb.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 0x4140fd1867b74c903c8833b737dbc7f3adc44ba522a79eaf7e07040ae158f262. 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/US3DF2245735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3f0aff851ab2dc52de5a800b0f68a445546b789fa0fdf60c721cf730bd6e16. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF2259761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ea228992ac2b8024d8c322377849a512f0fd13785cc4ddfb670906d04a2c99. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US3DF2259756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b344ebe5728760d1be8721b57189a709ebdeda9a65f1a69631c62f7e5d12170. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3DF2259757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1d8385569e122a4ac37a5e14ab3f8b0d150f2e485a12b3b15117d1283f7f81. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/US3DF2259758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025e19ba20572c0c859330797fde9b9682910a10ad367eec51b71e099bcb940c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:45:17Z), 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/US3DF2259759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea3636f46932055e161b8a1a4d3c4f565b677a12fcd122a3cff05415a98de14. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:51:09Z), 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/US3DF2259763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaf049eef27cb2500e513765317a0f2e290a4a62b1834a0b1e76f3d6e9f0d19. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US3DF2245730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408d4c412b53710072c4742c183e44c653f17a7d6359c6d44b4f7904e8b6445d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US3DF2245733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6ba6f41a260ee5da2daad8ae522fd00c8b3754fa4004d7deb59f2d7e957c86. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:39Z), 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/US3DF2245734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b967bec8dc8f43b53e356d9a08d4d6995364fe663d3af277c1f555072ca2227. 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/IDB832305710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3b1a919a788642c84dd7f1e6b60ce852d511fc3407b1c4268858a3dea7b5e6. 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/IDB832305713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e414a5cdd466e78c41a4275fe1f1f0aef42a98a9944833407ab6c5a0ca7945. 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/IDB832305714.