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 0xe195ba0cbc19e09bb51147a88091282f875a046f05436fa8037b1793218d6e84. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abbf7909-fa33-4ef5-b25f-b8325d3bb2ce.json and https://artists.proofprofile.net/proofs/artist/abbf7909-fa33-4ef5-b25f-b8325d3bb2ce.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 0x715c675e146f1bfd8e16a43add3ee980cc787cbf318fcd4cc416b7d2506f7f9f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBLLT1823902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5cdba67adae4e423368de95a8b79d9fe92c359eb82b0f21bf9705688aa71d9. 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/GBLLT1823906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4914472972050f4837e4d0bb529ee228f94e14063d703b1616126d81f66c2c3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/UKJ8H2203163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f380f4a57f1368bcf8e9e57da0e95d088c43b423840ecb95632eeb877aadaa. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKJ8H2203174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7c57238aae76eaf6026a463194694f5ca26817c0937c2239bef1de878f04c3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKJ8H2203366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05362dcf4bfddd2f6522eb42ab7dfa25ae0f02e0ef6443cb2400f6d5326153fa. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:52:32Z), 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/UKJ8H2203368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0abe4c721dc5f24609412a226b2d55493767906de04dd95d3731064fe89727b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKJ8H2303465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3429d980c88f80bc506adc50530a80fd04298948281383503ed8912e90ae84. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:36:56Z), 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/UKJ8H2303466.