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 0x1dddb73bf4a9415f4e03eae1bb64f43dfce1c98ec2632cfc2b94282d6228d1ae. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f8d9130-483b-4473-aa05-18fde2446591.json and https://artists.proofprofile.net/proofs/artist/2f8d9130-483b-4473-aa05-18fde2446591.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 0x77e2bd3305a03c6c3d53eb556c64d867cf98efe0496c928555a77273f9f37636. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWS2259858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dc1722faaae939a1f812c5589fb0a80eb4cf5e6d3dbcfe4353013d7acf1de7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZNWS2259859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c2ef37d1554fdf7f626d1391ee312fd0c7f3967e0d0b62f28b0b2fd6df721b. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZNWS2259860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dac9afb720a950d0f920a08482e1ba204ad45d9b16b3a6aa4b7de984190999. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:50:03Z), 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/QZNWS2259861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446af25acde6bc8c3acede710cf5b4aee85d7174fc4e59697658c86727878228. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZMEM2297635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b5b4cc051e2eb0d8b8f5b19f115907b3e059be1297833f259c3fb436ecfe36. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZNWS2259862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7378458499e296c60b2cb3db471d6bd75aeeedd72fc3365168cfa8613e6bbe22. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:35:36Z), 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/TCAGG2240605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fc0c95f1f13f954755d9aa54ea004035093512ace14c68ba63b95e7f3f6429. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZMEM2501956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062a2eff9c7f2f934486c925a4bc2326a57a980c8950c300507cb8de935114b9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMEM2501958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3a9027a83c186087bd29239d5c1a0ecf1b17ac54eb28d6319aa56fb7400692. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZMEM2501959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194d501a605fe1bec3b23c38aa95d3ffabded2ccda9f8a1f3d0caa803c01eef8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMEM2501960.