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 0xbee6d713e45f844ab205aeeb89654a5c8fba7c8cd87da66bb4404b84bdcb4d8b. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73194e82-96a6-4492-88ff-e6fd34cd81c6.json and https://artists.proofprofile.net/proofs/artist/73194e82-96a6-4492-88ff-e6fd34cd81c6.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 0x7a39de8961dcd5260088a38931f17561520c83800184e1a0262d97c3e053b31e. 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/BK26F2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2226e9ab5fea42cd7fa4b7b8f4ca42e96a93a70ab70a14915a6db9fd0ca45595. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BK26F2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67cae8e395191989f989460fe56f842bfe4742b57152da27df6c11ef2515635. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BK26F2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaa58f91654858fe4fe9f4ec2e3c24910e0312ca6677d45f79614ebbc8b69c0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:45Z), 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/QZNJW2556591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007b7e2b87f0f4f3928491df222f2b06d34faf1ec0d11d05489ffa74d86abd9d. 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/BK26F2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09a9cd3591f21bd5365712d3ee36ef24aff8f316f2be33fce9d856f849da6f4. 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/BK26F2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bab37daa587ce98e5b9c33b1d0636d79eafdeb6c1197cc50f40ae2d4f97b8fd. 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/BK26F2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76d54c7657d38cf15121062e019f256ca2c7c9516e87b96d19b5f50d60898de. 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/BK26F2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7688f8296b9f54c1e607d3c8a42c0364713e04c00e35fed3ca0bb4ccbf855e2f. 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/BXIKW2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab62a565103ac73e0dbff3a12f016d6e9b567cf2a085c41016aa4c87dd2dddf. 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/BXY8J2000047.