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 0x12b9d5b869e181e21b35c27a360370f49495f71ebd4fd1b2b259db0b55ace76a. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6caeb178-787c-45bd-9bb7-91cdd28679b8.json and https://artists.proofprofile.net/proofs/artist/6caeb178-787c-45bd-9bb7-91cdd28679b8.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 0xaa1a48cace6a4b4f9d23c0b5af8cc96525f791b05fe1ad9c2d2730524593ec1c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEE022400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48aa96c0d80a98b770743f2d09be0b56e6731042c40ce53f132cdc60fc901a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:03:33Z), 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/DEE022400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5c02f135767fddd3aaeee52905651bb40843247616ab54e30ec5a0fe461d00. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEE022400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c550a49814573b24a6ddb96dad5e58c0a9dfa2d44ece50c55b308ee20618d7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEE022400313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48aa96c0d80a98b770743f2d09be0b56e6731042c40ce53f132cdc60fc901a5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEE022400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1a48cace6a4b4f9d23c0b5af8cc96525f791b05fe1ad9c2d2730524593ec1c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEE022400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bd5dbcd46746dca144258d5dca9ca1beaf365373bb7e3838747ebfd761331b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITE8Q2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb212d393a0048cea653ad4c75f4cc9c47c3762e780d4dbe7d9f25fe4235f4daa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITE8Q1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b11864255c698fad45395968c8aff23146865962c624980aaad360ed9d2a39. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITE8Q1900005.