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 0xd0de1c41a85221ecc52a21d69a0b2ee4bbb0f97a51c6581a129726beb040ee53. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af9f1b6d-91f9-468c-ae51-e66da96a757b.json and https://artists.proofprofile.net/proofs/artist/af9f1b6d-91f9-468c-ae51-e66da96a757b.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 0xd10d7e1dbd795ae7838d4630879344906fe4fbbb6e6c8638954a2ed1383ac723. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMFME2458549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabac56abfebf0b7cb0edc000d3769d0f6a20a4b546ad7397cc3ad2dbd6d94a18. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMFME2458565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7cd7e02e663ad7dc27d4062d6077499cad9ed91f2174b880f8bdb0e33deaa1. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QMFME2458606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4533784906aaac2841facea3b66f6f5c6761f1b8e77121b91b1a29c0a9a4718c. 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/QMFME2458617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2d2e9ecc36006add727b5184e93d83eb4ef8d3f06623660b84e2b519a6fd09. 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/QMFME2458618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e1d7b569471c64370cbdac6f0c4aeb1132f51795bbc2686e79139ed5c77a3b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMFMF2438899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9a0ba43c282c2599a9e9056393d516542dab4d44b23b9c53ab24c474702b1b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:09:57Z), 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/QMFMF2440126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7ccb869fa850592ee11b7bba5efda5e2a24500b40cc2832f6f953a64f78b52. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFMF2440116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e7c02f22671daa44e49acaa9163a56b4df9a112a1b850feca795bab64ef8ea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMFMF2440121.