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 0x0710bb2143b28aab1cfe9ed2b5e3f44377466e59cf83b21951e32a362a923524. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7daf49d4-359a-4598-9dcc-7fd6d571fb8d.json and https://artists.proofprofile.net/proofs/artist/7daf49d4-359a-4598-9dcc-7fd6d571fb8d.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 0xfd81e14f55bb1935ce20674f8fae32ab558e0e304eaf97c551f6f3f9aa3e550f. 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/MX2832270642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3607dafe8093c7da4fdbd1a083263cfde439baa5472cbdf0fb5d3680b9aeae77. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/MX2832270643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626dba1c092107fa057443dcc2cc0343738709ed0bf0d35c36486d5dd6ef7965. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MX2832270644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63ecda9c4ab7cbb039ea81491db95346c092619b9f6792d72243d786bf4330f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MX2832270645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4f5133f1a0c0ebae31e707254e6c93be11e3c8d31d480ac23563ea6554956e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/MX2832270646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b578157c1f49715848e42066d1cbe163e9418140ae72a8240f93413e4e87af5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MX2832270647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580faee571743634b5ffbd96faaa5c19d7c4c9e03764b5d77ab0e4298a7b0315. 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/MX2832270648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d913b090e93fa83f64d0591a5c53693c8d44346bd6afd2f7d0d59cc41b51d0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:04:42Z), 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/MX2832270649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c7677f5cb78d70197be46976bc5a533aa3c9cc614b40d2ea1e355811b343a3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MX2832270650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9165c30783c39d7505ac12b8ad0f1ecab7cbae97ff0a7bc36ae1a78c69632db3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:15Z), 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/MX2832270651.