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 0xbe7a5b7fb1c53325e6ad6ce0e40590fe1743bc10ba0de8b0b1daf423893115a1. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e155a37b-1233-4a33-9c6f-030158111647.json and https://artists.proofprofile.net/proofs/artist/e155a37b-1233-4a33-9c6f-030158111647.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 0xb805d9aacc8530467249ebff347cae7c4720cb58f7230584174c2797e4dee75f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:37:57Z), 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/QZHN52143938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f63697ec019500a92b0ce90a333e04297a44c6c54b98c5dcff18b92f11de3b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFZ62513597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77397015622ddf7830a63021ca87afaf88cd960b92014d2850a583ad345b6774. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEM2540652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7312d6007621aa97c1863e143d9ff6f866f55af85cb729a96a8bbd2f9b9569. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6M2470282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc61842ad54cdf24e3ae42dad2af565b199a00f3cee092dc7c359bf63e0d83. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZNWS2583685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f63697ec019500a92b0ce90a333e04297a44c6c54b98c5dcff18b92f11de3b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:34Z), 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/QZFZ62513597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9836d7d1cb908d667b3c7e5e85a37741786856f743a0683ebb1820e55c10b86. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWS2583686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baba3cfce217e19ddd552769388fdb238b5967bc7a7b78b4ddc53694f6739b8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNWS2583687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304d15257afde338139d482bf05917f727be6e833f677c16c2689887d22338b4. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:32:49Z), 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/QZES62400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a66a563bb10ffaf81adb39557ba8c9ee90e9cd29647654848a535cf18d50a6. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWS2583688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb256ee700c5557c4f4966200bde0ccbb728afafb7f8d9d993c2d3c124f979d3. 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/QZNWS2583689.